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19-1396; Rev 0; 10/98
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
General Description
The MAX4578/MAX4579 are high-voltage, 8-channel CMOS multiplexers. The MAX4578 and dual 4-channel MAX4579 are ideal for precision ADC calibration and system self-monitoring applications. These calibration multiplexers (cal-muxes) have precision resistordividers to generate accurate voltage ratios from an input reference voltage. The reference ratios include 15/4096 and 4081/4096 of the external reference voltage, accurate to 15 bits, and 1/2(V+) and 5/8(V+ - V-), accurate to 8 bits. The external reference voltage as well as ground can also be switched to the output. The MAX4578/MAX4579 have enable inputs and address latching. All digital inputs have 0.8V and 2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using a single +12V or dual 15V supplies. Protection diodes at all inputs provide >2kV ESD rating. The MAX4578/MAX4579 operate from a single +4.5V to +36V supply or from dual supplies of 4.5V to 20V. On-resistance (350 max) is matched between switches to 15 max. Each switch can handle Rail-to-Rail(R) analog signals. The off-leakage current is 20pA at TA = +25C and 1.25nA at TA = +85C. The MAX4578/MAX4579 are available in small 20-pin SSOP, SO, and DIP packages.
Features
o On-Chip Gain and Offset Divider Networks Provide 15-Bit Accurate Output Ratios o On-Chip V+ to GND and V+ to V- Divider Networks Provide 8-Bit Accurate Output Ratios o 350 (max) RON o 12 (max) RON Matching Between Channels o 10pC (max) Charge Injection o Guaranteed 20pA Off-Leakage Current o Rail-to-Rail Signal Handling o Small 20-Pin SSOP, SO, DIP Packages
MAX4578/MAX4579
Ordering Information
PART MAX4578CAP MAX4578CWP MAX4578CPP MAX4578EAP MAX4578EWP MAX4578EPP TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 20 SSOP 20 Wide SO 20 Plastic DIP 20 SSOP 20 Wide SO 20 Plastic DIP
Ordering Information continued at end of data sheet.
Applications
Data-Acquisition Systems Test Equipment Avionics Audio Signal Routing Networking
V+ GND VREFHI 1 2 3 4
Pin Configurations/ Functional Diagrams
MAX4579
20 19 18 17 16 15R 4081R LATCH EN CAL A0 A1
LOGIC DECODER
4081R
15R
REFLO COMA NO1A NO2A NO3A NO4A
5 6 7 8 9 10
15 14 13 12 11
COMB NO4B NO3B NO2B NO1B
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4578 appears at end of data sheet.
1
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
ABSOLUTE MAXIMUM RATINGS
(Voltage Referenced to GND) V+ ...........................................................................-0.3V to +44V V- ............................................................................-44V to +0.3V V+ to V-...................................................................-0.3V to +44V CAL, LATCH A_, EN, NO_, COM_, REFHI, REFLO (Note 1) ................................(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal)....................................30mA Peak Current, NO_ or COM_ (pulsed at 1ms, 10% duty cycle max) .........................100mA Continuous Power Dissipation (TA = +70C) SSOP (derate 8mW/C above +70C) ..........................640mW Wide SO (derate 8mW/C above +70C)......................800mW Plastic DIP (derate 10.53mW/C above +70C) ...........842mW Operating Temperature Ranges MAX4578C_P/MAX4579C_P................................0C to +70C MAX4578E_P/MAX4579E_P .............................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on NO_, COM_, EN, LATCH, CAL, A_ exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--Dual 15V Supplies
(V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) -0.05PARAMETER 0.05 0.005 SWITCH Analog Signal Range On-Resistance On-Resistance Matching Between Channels (Note 4) NO Off-Leakage Current (Note 5) VCOM_, VNO_ RDS(ON) RON (Note 3) ICOM_ = 0.2mA, VNO_ = 10V, V+ = 13.5V, V- = -13.5V ICOM_ = 0.2mA, VNO_ = 10V, V+ = 13.5V, V- = -13.5V - VNO_ = +14V, VCOM_ = 14V, V+ = 16.5V, V- = -16.5V MAX4578 MAX4579 MAX4578 MAX4579 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.02 -1.25 -0.05 -6.5 -0.05 -3.25 -0.05 -6.5 -0.05 -3.25 0.008 0.006 0.005 0.005 0.001 4 V220 V+ 350 475 12 15 0.02 1.25 0.05 6.5 0.05 3.25 0.05 6.5 0.05 3.25 nA nA nA V SYMBOL CONDITIONS MIN TYP MAX UNITS
INO_(OFF)
COM Off-Leakage Current (Note 5)
VCOM_ = 14V, - VNO_ = +14V, ICOM_(OFF) V+ = 16.5V, V- = -16.5V VCOM_ = 14V, VNO_ = 14V, ICOM_(ON) V+ = 16.5V, V- = -16.5V
COM On-Leakage Current (Note 5)
2
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued)
(V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER LOGIC INPUTS Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range Positive Supply Current I+ VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -1 -5 50 0.001 4.5 50 20 80 A 120 1 A 5 80 A 120 V VIH VIL IIH IIL VEN = VA_ = VLATCH = VCAL = V+ VEN = VA_ = VLATCH = VCAL = 0 -1 -1 2.4 1.9 1.9 0.001 0.001 0.8 1 1 V V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4578/MAX4579
Negative Supply Current
I-
GND Supply Current
IGND
DYNAMIC CHARACTERISTICS Transition Time Break-Before-Make Interval (Note 3) Enable Turn-On Time Enable Turn-Off Time Charge Injection (Note 3) Off-Isolation Crosstalk Between Channels (Note 8) Logic Input Capacitance NO Off-Capacitance COM Off-Capacitance COM On-Capacitance tTRANS tOPEN tON tOFF VCTE VISO VCT CIN COFF CCOM_(OFF) CCOM_(ON) Figure 1 Figure 2 Figure 3 Figure 3 CL = 1nF, VNO_ = 0, RS = 0, Figure 4 VEN = 0, RL = 50, Figure 5 VEN = 2.4V, f = 1MHz, VGEN = 1Vp-p, Figure 5 f = 1MHz f = 1MHz, VEN = 0, Figure 6 f = 1MHz, VEN = 0, Figure 6 f = 1MHz, VEN = 2.4V, Figure 6 TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C 3.5 -75 -70 3 3 14 20 130 50 180 260 400 500 220 300 0 320 450 600 ns ns ns ns pC dB dB pF pF pF pF
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3
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued)
(V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER LATCH TIMING (Note 3) Setup Time Hold Time Enable Setup Time Pulse Width, LATCH Enable INTERNAL DIVIDERS VREFHI = 10V, REFLO = GND TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C (V+ / 2) Divider Output Referenced to GND TA = TMIN to TMAX TA = +25C (V+ - V-) Divider Output Referenced to VTA = TMIN to TMAX Output Resistance Offset Divider Output Resistance Gain Divider Output Resistance (V+ / 2) Divider Output Resistance (V+ - V-) Divider Output Resistance (REFHI, REFLO, GND) Additional Positive Supply Current (Note 3) (Note 3) (Note 3) (Note 3) (Note 3) (Note 3) (V+ / 2) divider active, VIH = V+, VIL = 0 TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C 2544 / 4096 2560 / 4096 400 400 6 6 400 V+ / 24k 2576 / 4096 800 800 9 9 800 V+ / 13k k k mA 2032 / 4096 2544 / 4096 2048 / 4096 2560 / 4096 2064 / 4096 2576 / 4096 LSB 14.9 / 4096 14.9 / 4096 4080.9 / 4096 4080.9 / 4096 2032 / 4096 15 / 4096 15 / 4096 4081 / 4096 4081 / 4096 2048 / 4096 15.1 / 4096 LSB 15.1 / 4096 4081.1 / 4096 LSB 4081.1 / 4096 2064 / 4096 LSB tS tH tES tMPW Figure 7 Figure 7 Figure 8 Figure 7 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 120 180 72 -10 -10 22 40 60 0 70 200 250 ns ns ns ns SYMBOL CONDITIONS MIN TYP MAX UNITS
Offset Divider Output
Gain Divider Output
VREFHI = 10V, REFLO = GND
4
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued)
(V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER Additional Positive Supply Current (Note 3) Additional Negative Supply Current (Note 3) REFHI, REFLO Input Range (Note 3) Input Resistance (REFHI, REFLO) (Note 3) Offset divider active, gain divider active TA = +25C SYMBOL CONDITIONS (V+ - V-) divider active, VIH = V+, VIL = 0 (V+ - V-) divider active, VIH = V+, VIL = 0 TA = +25C TA = +25C V- 0.3 17 32 MIN TYP MAX UNITS mA mA V k
MAX4578/MAX4579
(V+ - V-) / (V+ - V-) / 24k 13k (V+ - V-) / (V+ - V-) / 24k 13k V+ + 0.3
ELECTRICAL CHARACTERISTICS--Dual 5V Supplies
(V+ = +5V 10%, V- = -5V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SWITCH Analog Signal Range On-Resistance On-Resistance Matching Between Channels (Note 4) NO Off-Leakage Current (Note 5) COM Off-Leakage Current (Note 5) VNO_, VCOM_ RDS(ON) (Note 3) ICOM_ = 0.2mA, VNO_ = 3V, V+ = 4.5V, V- = -4.5V ICOM_ = 0.2mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V - VNO_ = +4.5V, VCOM_ = 4.5V, V+ = 5.5V, V- = -5.5V MAX4578 MAX4579 MAX4578 MAX4579 TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.02 -1.25 -0.05 -6.5 -0.5 -6.5 -0.05 -6.5 -0.05 -3.25 0.008 0.005 0.005 10 0.001 0.02 1.25 0.05 6.5 0.5 6.5 0.05 6.5 0.05 3.25 nA nA V660 V+ 900 1100 V SYMBOL CONDITIONS MIN TYP MAX UNITS
RDS(ON)
INO(OFF)
nA
VCOM_ = 4.5V, - 1V; VNO_ = +4.5V, ICOM_(OFF) V+ = 5.5V, V- = -5.5V VCOM_ = 4.5V, VNO_ = 4.5V or ICOM_(ON) floating, V+ = 5.5V, V- = -5.5V
COM On-Leakage Current (Note 5)
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5
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
ELECTRICAL CHARACTERISTICS--Dual 5V Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, logic levels = 2.4V and 0.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER LOGIC INPUTS (Note 3) Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low VIH VIL IIH IIL VEN = VA_ = VLATCH = VCAL = V+ VEN = VA_ = VLATCH = VCAL = 0 -1.0 -1.0 2.4 1.4 1.4 0.001 0.001 0.5 1.0 1.0 V V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
DYNAMIC CHARACTERISTICS (Note 3) Transition Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time tTRANS tOPEN tON tOFF VNO1 = 3V, VNO8 = 0, Figure 1 Figure 2 VNO1 = 3V, Figure 3 VNO1 = 3V, Figure 3 TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 0.5 200 440 0.675 1.2 1.5 1.0 1.3 1.0 1.8 2.2 s ns s s
ELECTRICAL CHARACTERISTICS--Single +12V Supply
(V+ = +12V, V- = 0, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at T A = +25C.) (Note 2) PARAMETER SWITCH Analog Signal Range On-Resistance On-Resistance Matching Between Channels (Note 4) NO Off-Leakage Current (Notes 5, 9) VNO_, VCOM_ RDS(ON) (Note 3) ICOM_ = 0.2mA, VNO_ = 3V, 10V TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX -0.02 -1.25 8 0.001 0.02 1.25 0 470 V+ 750 850 V SYMBOL CONDITIONS MIN TYP MAX UNITS
R(ON)
ICOM_ = 0.2mA, VNO_ = 3V, 10V VCOM_ = 1V, 11V; VNO_ = 11V, 1V
INO(OFF)
nA
6
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued)
(V+ = +12V, V- = 0, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SWITCH (continued) MAX4578 COM Off-Leakage Current (Notes 5, 9) VCOM_ = 11V, 1V; ICOM_(OFF) VNO_ = 1V, 11V MAX4579 MAX4578 MAX4579 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.05 -6.5 -0.05 -3.25 -0.05 -6.5 -0.05 -3.25 2.4 1.8 1.8 VEN = VA_ = VLATCH = VCAL = V+ VEN = VA_ = VLATCH = VCAL = 0 -1 -1 0.001 0.001 0.8 1 1 0.006 0.005 0.005 0.05 6.5 0.05 3.25 0.05 6.5 0.05 3.25 V V A A nA nA SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4578/MAX4579
COM On-Leakage Current (Notes 5, 9) LOGIC INPUTS Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low
VCOM_ = 11V, 1V; ICOM_(ON) VNO_ = 11V, 1V, or floating
VIH VIL IIH IIL
DYNAMIC CHARACTERISTICS (Note 3) Transition Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time tTRANS tOPEN tON tOFF VNO1 = 8V, VNO8 = 0, Figure 1 Figure 2 Figure 3 Figure 3 TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 150 120 400 540 800 1100 315 450 600 850 1100 ns ns ns ns
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: Guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at TA = +25C. Note 6: If the logic inputs can float during power-on, connect a 1M pull-up from LATCH to V+. See Applications Information section. Note 7: Off-Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch. Note 8: Between any two switches. Note 9: Leakage parameters testing at single supply are guaranteed by correlation with dual supplies.
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7
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX4578/79 toc 01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (15V DUAL SUPPLIES)
MAX4578/79 toc 02
ON-RESISTANCE vs. VCOM AND TEMPERATURE (5V DUAL SUPPLIES)
700 600 RON () 500 TA = +25C 400 300 TA = -40C V+ = +5V V- = -5V
MAX4578/79 toc 03
750 650 550 RON () 4.5V
400 350 300 RON () 250 200 150 100 50
V+ = +15V V- = -15V TA = +85C TA = +70C TA = +25C TA = -40C
800
TA = +85C TA = +70C
450 350 250 15V 150 -15 -10 -5 0 VCOM (V) 5 10 15 12V 7.5V 10V
200 100 0
0 -15 -10 -5 0 VCOM (V) 5 10 15
-5
-4
-3
-2
-1
0
1
2
3
4
5
VCOM (V)
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
MAX4578/79 toc 04
ON-RESISTANCE vs. VCOM AND TEMPERATURE (5V SINGLE SUPPLY)
1800 1600 1400 RON () 1200 1000 800 TA = -40C TA = +70C TA = +25C RON () TA = +85C
MAX4578/79 toc 05
ON-RESISTANCE vs. VCOM AND TEMPERATURE (12V SINGLE SUPPLY)
MAX4578/79 toc 06
2100 1900 +4.5V 1700 1500 RON () 1300 1100 900 700 500 300 0 2.5 5.0 7.5 10 +7.5V +10V +12V
2000
700 600 TA = +85C 500 TA = +70C 400 TA = +25C 300 200 100 TA = -40C
600 400 200 0 12.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V) V+ = +5V
V+ = +12V 0 0 2 4 6 VCOM (V) 8 10 12
VCOM (V)
LEAKAGE CURRENT vs. TEMPERATURE
MAX4578/79 toc 07
SUPPLY CURRENT vs. TEMPERATURE
MAX4578/79 toc 08
TURN-ON/TURN-OFF TIME vs. SUPPLY
MAX4578/79 TOC 09
1000 100 LEAKAGE CURRENT (nA) 10 1 0.1 ICOM (ON) 0.01 0.001 0.0001 -55 -35 -15 5 25 45 65 INO (OFF) ICOM (OFF) V+ = +15V V- = -15V
1m 100 10 I+, I- (A) 1 100n 10n 1n II+
700 600 500 tON, tOFF (ns) 400 300 200 100 0 tON
tOFF
85 105 125
-40
-20
0
20
40
60
80
100
5
6
7
8
9
10 11 12 13 14 15
TEMPERATURE (C)
TEMPERATURE (C)
V+, V- (V)
8
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
MAX4578/MAX4579
TURN-ON/TURN-OFF TIME vs. TEMPERATURE (15V)
MAX4578/79 toc 10
TURN-ON/TURN-OFF TIME vs. TEMPERATURE (5V)
MAX4578/79 toc 11
TURN-ON/TURN-OFF TIME vs. TEMPERATURE (12V)
700 600 tON, tOFF (ns) 500 400 300 200 100 0 tOFF tON V+ = +12V V- = 0
MAX4578/79 toc 12
400 350 300 tON, tOFF (ns) 250 200 150 100 50 0 -40 -20 0 20 40 60 80 tOFF V+ = +15V V- = -15V tON
900 800 700 tON, tOFF (ns) 600 500 400 300 200 100 0 tOFF tON V+ = +5V V- = -5V
800
100
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
CHARGE INJECTION vs. VCOM
MAX4578/79 toc 13
OFFSET DIVIDER OUTPUT vs. VREFHI
MAX4578/79 toc 14
OFFSET DIVIDER OUTPUT vs. TEMPERATURE
15.080 15.060 OUTPUT RATIO (LSB) 15.040 15.020 15.000 14.980 14.960 14.940 14.920 14.900 VREFHI = 10V VREFLO = 0 V+ = +15V V- = -15V
MAX4578/79 toc 15
10 8 6 Q (pC) 4 2 0 5V -2 -4 -15 -10 -5 0 VCOM (V) 5 10 12V 15V
15.100 15.080 15.060 OUTPUT RATIO (LSB) 15.040 15.020 15.000 14.980 14.960 14.940 14.920 14.900 5V 15V VREFLO = 0
15.100
15
1234
5 6 7 8 9 10 11 12 13 14 15 VREFHI (V)
-40
-20
0
20
60
80
100
TEMPERATURE (C)
GAIN DIVIDER OUTPUT vs. VREFHI
MAX4578/79 toc 16
GAIN DIVIDER OUTPUT vs. TEMPERATURE
MAX4578/79 toc 17
(V+ / 2) DIVIDER OUTPUT vs. SUPPLY VOLTAGE
2058.00 2056.00 OUTPUT RATIO (LSB) 2054.00 2052.00 2050.00 2048.00 2046.00 2044.00 2042.00 2040.00
MAX4578/79 toc 18
4081.100 4081.080 4081.060 OUTPUT RATIO (LSB) 4081.040 4081.020 4081.000 4080.980 4080.960 4080.940 4080.920 4080.900 1234 5V 15V VREFLO = 0
4081.100 4081.080 4081.060 OUTPUT RATIO (LSB) 4081.040 4081.020 4081.000 4080.980 4080.960 4080.940 4080.920 4080.900 VREFHI = 10V VREFLO = 0 V+ = +15V V- = -15V
2060.00
5 6 7 8 9 10 11 12 13 14 15 VREFHI (V)
-40
-20
0
20
60
80
100
5
6
7
8
9
10 11 12 13 14 15
TEMPERATURE (C)
V+, V- (V)
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9
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
(V+ / 2) DIVIDER OUTPUT vs. TEMPERATURE
MAX4578/79 toc 19
(V+ - V-) DIVIDER OUTPUT vs. SUPPLY VOLTAGE
MAX4578/79 toc 20
(V+ - V-) DIVIDER OUTPUT vs. TEMPERATURE
2568 2566 OUTPUT RATIO (LSB) 2564 2562 2560 2558 2556 2554 15V 5V
MAX4578/79 toc 21
2055 2054 2053 OUTPUT RATIO (LSB) 2052 2051 2050 2049 2048 2047 2046 2045 -40 -20 0 20 60 80 15V 5V
2570
2570
2565 OUTPUT RATIO (LSB)
2560
2555
2550
2545 100 5 6 7 8 9 10 11 12 13 14 15 TEMPERATURE (C) V+, V- (V)
2552 -40 -20 0 20 60 80 100 TEMPERATURE (C)
ROUT vs. TEMPERATURE (OFFSET DIVIDER AND GAIN DIVIDER)
MAX4578/79 toc 22
ROUT vs. TEMPERATURE (V+ / 2 DIVIDER AND V+ - V- DIVIDER)
MAX4578/79 toc 23
FREQUENCY RESPONSE
0dB
MAX4578/79 toc 24
500 V+ = +15V V- = -15V 450
6100 5900 5700 ROUT () 5500 5300 5100 (V+ / 2) DIVIDER V+ = +15V V- = -15V
INSERTION LOSS 40/div
ROUT ()
400
GAIN DIVIDER
ON-PHASE 10dB/ div (V+ - V-) DIVIDER OFF-ISOLATION
350 OFFSET DIVIDER 300
4900 4700
250 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
4500 -40 -20 0 20 40 60 80 100 100k 1M 10M 100M TEMPERATURE (C) FREQUENCY (Hz)
10
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
Pin Descriptions
MAX4578 (Single 8-to-1 Cal-Mux)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME V+ GND VREFHI REFLO COM NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 A2 A1 A0 CAL EN LATCH Ground Negative Supply Voltage Reference High Voltage Input Reference Low Voltage Input Output Channel Input 1 Channel Input 2 Channel Input 3 Channel Input 4 Channel Input 5 Channel Input 6 Channel Input 7 Channel Input 8 Address Bit 2 Address Bit 1 Address Bit 0 Calibration Control Input Multiplexer Enable Address Latch Control Input FUNCTION Positive Supply Voltage
MAX4578/MAX4579
MAX4579 (Dual 4-to-1 Cal-Mux)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME V+ GND VREFHI REFLO COMA NO1A NO2A NO3A NO4A NO1B NO2B NO3B NO4B COMB A1 A0 CAL EN LATCH Ground Negative Supply Voltage Reference High Voltage Input Reference Low Voltage Input Multiplexer Output A Channel Input 1A Channel Input 2A Channel Input 3A Channel Input 4A Channel Input 1B Channel Input 2B Channel Input 3B Channel Input 4B Multiplexer Output B Address Bit 1 Address Bit 0 Calibration Control Input Multiplexer Enable Address Latch Control Input FUNCTION Positive Supply Voltage
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11
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
Truth Tables
MAX4578 (Single 8-to-1 Cal-Mux)
CAL x x 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 x x 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A1 x x 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 x x 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 EN 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 LATCH x 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 COM All switches and dividers open. COM is high-Z. Latch contents set to all 1s. State is latched when LATCH is high. NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 (V+ / 2) Divider, VCOM = 2048 / 4096 (V+) REFHI REFLO (V+ - V-) Divider, VCOM= 2560 / 4096 (V+ - V-) GND Gain Divider Mode VCOM = (4081 / 4096) (VREFHI - VREFLO) Offset Divider Mode VCOM = (15 / 4096) (VREFHI - VREFLO) All switches and dividers open. COM is high-Z.
x = Don't Care
MAX4579 (Dual 4-to-1 Cal-Mux)
CAL x x 0 0 0 0 1 1 1 1 A1 x x 0 0 1 1 0 0 1 1 A0 x x 0 1 0 1 0 1 0 1 EN 0 1 1 1 1 1 1 1 1 1 LATCH x 1 0 0 0 0 0 0 0 0 COMA All switches and dividers open. COMA is high-Z. State is latched NO1A NO2A NO3A NO4A GND Gain Divider Mode Offset Divider Mode All switches and dividers open. COMA is high-Z. COMB All switches and dividers open. COMB is high-Z. State is latched NO1B NO2B NO3B NO4B GND REFLO REFLO All switches and dividers open. COMB is high-Z.
x = Don't Care
12
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
Detailed Description
The MAX4578/MAX4579 are multiplexers with additional calibration features. Internal resistor-dividers generate accurate voltage ratios from an external voltage reference, allowing zero and full-scale calibration of ADC systems, as well as facilitation of system self-monitoring. To access the resistor-dividers, assert the CAL pin. When CAL and ENABLE are asserted, the three address pins select one of the various resistor-divider or external reference outputs. The MAX4578/ MAX4579 also contain a LATCH input that allows the state of the CAL and address signals to be captured. they are reverse-biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakage varies as the signal varies. The difference in the two-diode leakage from the signal path to the V+ and V- pins constitutes the analog signal-path leakage current. All analog-leakage current flows to the supply terminals, not to the other switch terminal, which explains how both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog-signal paths and GND. The analog-signal paths consist of an N-channel and P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase with V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators and set the input-logic thresholds. The logiclevel translators convert the logic levels to switched V+ and V- signals to drive the gates of the analog switches. This drive signal is the only connection between the logic supplies and the analog supplies. All pins have ESD protection to V+ and to V-. Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the P-channel switches, which reduces their on-resistance. V- also sets the negative limit of the analog-signal voltage. The logic-level thresholds are CMOS- and TTLcompatible when V+ is greater than +4.5V.
MAX4578/MAX4579
Calibration Functions
The gain-divider, offset-divider, REFHI, and REFLO modes allow calibration of offset and gain errors in ADC systems. The gain-divider mode outputs a voltage ratio that is 4081/4096 of VREFHI - VREFLO, accurate to 0.1/4096 or better than 15 bits. The offset-divider mode outputs a voltage ratio that is 15/4096 of V REFHI VREFLO, also accurate to 0.1/4096. The REFHI mode allows the voltage on the REFHI pin to be switched to the output. The REFLO mode allows the voltage on the REFLO pin to be switched to the output.
Self-Monitoring Functions
The self-monitoring functions are intended to allow an ADC to measure its own supply voltage. The MAX4578 has an internal divide-by-two resistor string between V+ and GND that is accurate to 8 bits. It also has a 5/8 resistor string between V+ and V- that is accurate to 8 bits. This divider string allows measurement of the negative supply with a unipolar ADC. GND can also be switched to the output, eliminating the need for an additional multiplexer channel.
Bipolar-Supply Operation
The MAX4578/MAX4579 operate with bipolar supplies between 4.5V and 20V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 44V. Note: Do not connect the MAX4578/MAX4579 V+ pin to +3V AND connect logic-level input pins to TTL logic-level signals. TTL logic-level outputs can exceed the absolute maximum ratings, which will cause damage to the part and/or external circuits.
__________ Applications Information
The MAX4578/MAX4579's construction is typical of most CMOS analog switches. There are three supply pins: V+, V-, and GND. The positive and negative power supplies provide drive to the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse-biased ESD protection diodes are internally connected between each analog signal pin and both V+ and V-. If the voltage on any pin exceeds V+ or V-, one of these diodes will conduct. During normal operation, these reverse-biased ESD diodes leak, forming the only current drawn from V-. Virtually all the analog leakage current is through the ESD diodes. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced,
Single-Supply Operation
The MAX4578/MAX4579 operate from a single supply between +4.5V and +36V when V- is connected to GND. All of the bipolar precautions must be observed (see Bipolar Supply Operation section). However these parts are optimized for 15V operation, and most AC and DC characteristics are degraded significantly when departing from 15V. As the overall supply voltage (V+ to V-) is lowered, switching speed, on-resistance, off-isolation, and distortion will degrade, and supply current will decrease (see the Typical Operating Characteristics section).
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13
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
Single-supply operation also limits signal levels and interferes with ground referenced signals. When V- = 0, AC signals are limited to -0.3V. Voltages below -0.3V can be clipped by the internal ESD-protection diodes, and the parts can be damaged if excessive current flows.
Power Off
When power to the MAX4578/MAX4579 is off (i.e., V+ = V- = 0), the Absolute Maximum Ratings still apply. This means that neither logic-level inputs on NO_ nor signals on COM_ can exceed 0.3V. Voltages beyond 0.3V cause the internal ESD-protection diodes to conduct, and the parts can be damaged if excessive current flows.
Power Up
During power up, on-chip latches will strobe whatever addresses are present if EN goes high before LATCH reaches a logic high. When this condition occurs, one of the internal dividers connected between the supplies may immediately turn on, causing higher supply current (1.4mA) when the enable input is toggled. Avoid this condition by ensuring that EN stays low until the remaining logic inputs are valid. To accomplish this, connect a resistor from EN to ground or apply a low voltage to EN before the other logic inputs go high.
______________________________________________Test Circuits/Timing Diagrams
+15V V+ V+ EN LATCH CAL A0 A1 A2 50 -15V NO1 NO2-NO7 +5V
MAX4578
GND V-
NO8 COM
-5V VCOM 10pF 1k LOGIC -15V INPUT VEN 0V VNO1, VNO1B SWITCH OUTPUT VCOM 50% 50% tR < 20ns tF < 20ns
90%
+15V V+ V+ EN LATCH CAL A0 A1 GND 50 -15V NO1B NO2B-NO3B NO1A-NO2A +5V
0V 90%
VNO8, VNO4B
tTRANS -5V VCOM 1k 10pF
tTRANS
MAX4579 NO4B
COMB V-
Figure 1. Transition Time
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
Test Circuits/Timing Diagrams (continued)
+15V V+ EN LATCH CAL A0 VA A1 A2 50 GND V1k +15V V+ EN LATCH CAL A0 VA A1 50 GND V+ NO1A-NO4B NO1B-NO4B LOGIC +5V INPUT 0V VA 0.8VNO_ COMA V1k -15V 90% VCOM 10pF SWITCH OUTPUT VCOM 0V 90% 50% -15V 10pF NO1-NO8 +5V V+ LOGIC INPUT VA +5V 50% 0V 50% tR < 20ns tF < 20ns
MAX4578/MAX4579
MAX4578
COM VCOM
0.8VNO_ 90% SWITCH OUTPUT VCOM 0V
tOPEN
tR < 20ns t < 20ns 50% F
+5V
MAX4579
tOPEN
Figure 2. Break-Before-Make Interval
+15V VEN EN LATCH CAL A0 50 V+ NO1 NO2-NO8 VEN +5V 50% 0V VCOM 1k +15V VEN EN LATCH CAL A0 A1 50 GND V+ -15V 10pF 0.8(VNO1, VNO1B) VCOM 90% 90% NO1B +5V 50% +5V tR < 20ns tF < 20ns
MAX4578
COM V-
A1 A2 GND
NO2B-NO4B NO1A-NO4A
MAX4579
COMB V1k -15V VCOM 10pF
0V tON
tOFF
Figure 3. Enable Switching Time
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
_________________________________Test Circuits/Timing Diagrams (continued)
+15V RS NO_ EN VS CHANNEL SELECT A0 A1 A2 V+ LOGIC INPUT VEN COM VCOM VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT * CL +15V RS NO_ EN VS CHANNEL SELECT A0 A1 CAL LATCH GND CL = 100pF V-15V Q = VOUT * CL VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. V+ LOGIC INPUT VEN COMA VCOM +5V ON 0V OFF ON +5V ON 0V OFF ON
MAX4578
CAL LATCH GND
CL = 100pF V-15V
MAX4579
Figure 4. Charge Injection
16
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
_________________________________Test Circuits/Timing Diagrams (continued)
+15V 10nF NETWORK ANALYZER 50 50 VOUT VIN VOUT VIN
MAX4578/MAX4579
V+
EN
V+ NO_
VIN
OFF-ISOLATION = 20log
V+ A
MAX4578 MAX4579
COM_ LATCH CAL V- GND 10nF
CROSSTALK = 20log VCOM MEAS. REF
50
50
-15V
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" TERMINAL ON EACH SWITCH. ON LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH.
Figure 5. Off-Isolation/Crosstalk
+15V V+ A2 CHANNEL SELECT A1 A0 CAL, LATCH, GND EN VNO1 1MHz CAPACITANCE ANALYZER f = 1MHz
+15V V+ NO1A A1 A0 CAL, LATCH, GND EN 1MHz CAPACITANCE ANALYZER f = 1MHz V-
MAX4578
NO8 COM
CHANNEL SELECT
MAX4579 NO4A
COMA
-15V
-15V
Figure 6. NO_/COM_ Capacitance
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17
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
_________________________________Test Circuits/Timing Diagrams (continued)
+15V +15V
EN +5V NO2
V+
LATCH +5V
EN NO2
V+
LATCH
MAX4578
NO1, NO3-NO8 A1 A2 CAL GND VCOM A0 NO1, NO3-NO8 A1 A2 CAL
MAX4578
A0
GND
V-
COM
-15V
-15V
LATCH 50% tS ADDRESS (A_) VIN VIL
tMPW 50% tH
LATCH 50%
50% EN VIH - VIL 2 tES
NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS
Figure 7. Setup Time, Hold Time, Latch Pulse Width
Figure 8. Enable Setup Time
18
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High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
Pin Configurations/ Functional Diagrams (continued)
MAX4578/MAX4579
V+
1 3R
MAX4578
R2 LOGIC DECODER
20 19 18 17 16 15
LATCH EN CAL A0 A1 A2
5R GND VREFHI 2 3 4 15R1
R2
4081R1
15R1 4081R1 REFLO COM NO1 NO2 NO3 NO4 5 6 7 8 9 10 14 13 12 11
NO8 NO7 NO6 NO5
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19
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/MAX4579
Ordering Information (continued)
PART MAX4579CAP MAX4579CWP MAX4579CPP MAX4579EAP MAX4579EWP MAX4579EPP TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 20 SSOP 20 SO Wide 20 Plastic DIP 20 SSOP 20 SO Wide 20 Plastic DIP
___________________Chip Information
TRANSISTOR COUNT: 520
Package Information
SSOP.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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