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Isolated, Precision Half-Bridge Driver, 0.1 A Output ADUM1234
FEATURES
Isolated high-side and low-side outputs High side or low side relative to input: 700 VPEAK High-side/low-side differential: 700 VPEAK 0.1 A peak output current CMOS input threshold levels High frequency operation: 5 MHz maximum High common-mode transient immunity: >75 kV/s High temperature operation: 105C Wide body, RoHS compliant, 16-lead SOIC UL1577 2500 V rms input-to-output withstand voltage
GENERAL DESCRIPTION
The ADUM12341 is an isolated, half-bridge gate driver that employs the Analog Devices, Inc. iCoupler(R) technology to provide independent and isolated high-side and low-side outputs. Combining high speed CMOS and monolithic transformer technology, this isolation component provides outstanding performance characteristics superior to optocoupler-based solutions. By avoiding the use of LEDs and photodiodes, this iCoupler gate drive device is able to provide precision timing characteristics not possible with optocouplers. Furthermore, the reliability and performance stability problems associated with optocoupler LEDs are avoided. In comparison to gate drivers employing high voltage level translation methodologies, the ADUM1234 offers the benefit of true, galvanic isolation between the input and each output. Each output can be operated up to 700 VPEAK relative to the input, thereby supporting low-side switching to negative voltages. The differential voltage between the high side and low side can be as high as 700 VPEAK. As a result, the ADUM1234 provides reliable control over the switching characteristics of IGBT/MOSFET configurations over a wide range of positive or negative switching voltages.
APPLICATIONS
Isolated IGBT/MOSFET gate drives Plasma displays Industrial inverters Switching power supplies
FUNCTIONAL BLOCK DIAGRAM
VIA 1 VIB 2 VDD1 3 GND1 4 DISABLE 5 NC 6 NC 7 VDD1 8 NC = NO CONNECT ENCODE DECODE
ADUM1234
ENCODE DECODE
16 15 14 13 12 11 10 9
VDDA VOA GNDA NC NC VDDB VOB GNDB
06920-001
Figure 1.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329. Other patents pending.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 (c)2007 Analog Devices, Inc. All rights reserved.
ADUM1234 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics ............................................................. 3 Package Characteristics ............................................................... 4 Regulatory Information ............................................................... 4 Insulation and Safety-Related Specifications ............................ 4 Recommended Operating Conditions .......................................4 Absolute Maximum Ratings ............................................................5 ESD Caution...................................................................................5 Pin Configuration and Function Descriptions..............................6 Typical Perfomance Characteristics ................................................7 Application Notes ..............................................................................8 Common-Mode Transient Immunity ........................................8 Insulation Lifetime ........................................................................9 Outline Dimensions ....................................................................... 10 Ordering Guide .......................................................................... 10
REVISION HISTORY
7/07--Revision 0: Initial Version
Rev. 0 | Page 2 of 12
ADUM1234 SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
4.5 V VDD1 5.5 V, 12 V VDDA 18 V, 12 V VDDB 18 V. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are at TA = 25C, VDD1 = 5 V, VDDA = 15 V, VDDB = 15 V. All voltages are relative to their respective grounds. Table 1.
Parameter DC SPECIFICATIONS Input Supply Current, Quiescent Output Supply Current A or Output Supply Current B, Quiescent Input Supply Current, 10 Mbps Output Supply Current A or Output Supply Current B, 10 Mbps Input Currents Logic High Input Threshold Logic Low Input Threshold Logic High Output Voltages Logic Low Output Voltages Output Short-Circuit Pulsed Current 1 SWITCHING SPECIFICATIONS Minimum Pulse Width 2 Maximum Switching Frequency 3 Propagation Delay 4 Change vs. Temperature Pulse Width Distortion, |tPLH - tPHL| Channel-to-Channel Matching, Rising or Falling Edges 5 Channel-to-Channel Matching, Rising vs. Falling Edges 6 Part-to-Part Matching, Rising or Falling Edges 7 Part-to-Part Matching, Rising vs. Falling Edges 8 Output Rise/Fall Time (10% to 90%)
1 2 3
Symbol IDDI(Q) IDDA(Q), IDDB(Q) IDDI(10) IDDA(10), IDDB(10) IIA, IIB, IDISABLE VIH VIL VOAH,VOBH VOAL,VOBL IOA(SC), IOB(SC) PW tPHL, tPLH PWD
Min
Typ 3.0 0.3 6.0 16
Max 4.2 1.2 9.0 22 +10
Unit mA mA mA mA A V V V V mA ns Mbps ns ps/C ns ns ns ns ns ns
Test Conditions
CL = 200 pF 0 V VIA, VIB, VDISABLE VDD1
-10 0.7 x VDD1
+0.01
0.3 x VDD1 VDDA - 0.1, VDDB - 0.1 100 100 10 97 124 100 160 8 5 13 55 63 VDDA, VDDB 0.1
IOA, IOB = -1 mA IOA, IOB = +1 mA
CL = 200 pF CL = 200 pF CL = 200 pF CL = 200 pF CL = 200 pF CL = 200 pF CL = 200 pF CL = 200 pF, Input tR = 3 ns CL = 200 pF, Input tR = 3 ns CL = 200 pF
tR/tF
25
Short-circuit duration less than 1 second. The minimum pulse width is the shortest pulse width at which the specified timing parameters are guaranteed. The maximum switching frequency is the maximum signal frequency at which the specified timing parameters are guaranteed. 4 tPHL propagation delay is measured from the 50% level of the falling edge of the VIx signal to the 50% level of the falling edge of the VOx signal. tPLH propagation delay is measured from the 50% level of the rising edge of the VIx signal to the 50% level of the rising edge of the VOx signal. 5 Channel-to-channel matching, rising or falling edges, is the magnitude of the propagation delay difference between two channels of the same part when the inputs are either both rising or falling edges. The supply voltages and the loads on each channel are equal. 6 Channel-to-channel matching, rising vs. falling edges, is the magnitude of the propagation delay difference between two channels of the same part when one input is a rising edge and the other input is a falling edge. The supply voltages and loads on each channel are equal. 7 Part-to-part matching, rising or falling edges, is the magnitude of the propagation delay difference between the same channels of two different parts when the inputs are either both rising or falling edges. The supply voltages, temperatures, and loads of each part are equal. 8 Part-to-part matching, rising vs. falling edges, is the magnitude of the propagation delay difference between the same channels of two different parts when one input is a rising edge and the other input is a falling edge. The supply voltages, temperatures, and loads of each part are equal.
Rev. 0 | Page 3 of 12
ADUM1234
PACKAGE CHARACTERISTICS
Table 2.
Parameter Resistance (Input-to-Output) 1 Capacitance (Input-to-Output)1 Input Capacitance IC Junction-to-Ambient Thermal Resistance
1
Symbol RI-O CI-O CI JA
Min
Typ 1012 2.0 4.0 76
Max
Unit pF pF C/W
Test Conditions f = 1 MHz
The device is considered a 2-terminal device: Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together.
REGULATORY INFORMATION
The ADUM1234 has been approved by the organization listed in Table 3. Refer to Table 7 and the Insulation Lifetime section for details regarding recommended maximum working voltages for specific cross-isolation waveforms and insulation levels. Table 3.
UL Recognized under the 1577 component recognition program 1 Single/basic insulation, 2500 V rms isolation voltage
1
In accordance with UL1577, each ADUM1234 is proof tested by applying an insulation test voltage 3000 V rms for 1 second (current leakage detection limit = 5 A).
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 4.
Parameter Rated Dielectric Insulation Voltage Minimum External Air Gap (Clearance) Minimum External Tracking (Creepage) Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group Symbol L(I01) L(I02) Value 2500 7.7 min 8.1 min 0.017 min >175 IIIa Unit V rms mm mm mm V Conditions 1 minute duration Measured from input terminals to output terminals, shortest distance through air Measured from input terminals to output terminals, shortest distance path along body Insulation distance through insulation DIN IEC 112/VDE 0303 Part 1 Material Group (DIN VDE 0110, 1/89, Table 1)
CTI
RECOMMENDED OPERATING CONDITIONS
Table 5.
Parameter Operating Temperature Input Supply Voltage 1 Output Supply Voltages1 Input Signal Rise and Fall Times Common-Mode Transient Immunity, Input-to-Output 2 Common-Mode Transient Immunity, Between Outputs2 Transient Immunity, Supply Voltages2
1 2
Symbol TA VDD1 VDDA, VDDB
Min -40 4.5 12 -75 -75 -75
Max +105 5.5 18 100 +75 +75 +75
Unit C V ns kV/s kV/s kV/s
All voltages are relative to their respective ground. See the Common-Mode Transient Immunity section for additional data.
Rev. 0 | Page 4 of 12
ADUM1234 ABSOLUTE MAXIMUM RATINGS
Ambient temperature = 25C, unless otherwise noted. Table 6.
Parameter Storage Temperature (TST) Ambient Operating Temperature (TA) Input Supply Voltage (VDD1) 1 Output Supply Voltage1 (VDDA, VDDB) Input Voltage1 (VIA, VIB) Output Voltage1 VOA VOB Input-to-Output Voltage 2 Output Differential Voltage 3 Output DC Current (IOA, IOB) Common-Mode Transients 4
1 2 3
Rating -55C to +150C -40C to +105C -0.5 V to +7.0 V -0.5 V to +27 V -0.5 V to VDDI + 0.5 V -0.5 V to VDDA + 0.5 V -0.5 V to VDDB + 0.5 V -700 VPEAK to +700 VPEAK 700 VPEAK -20 mA to +20 mA -100 kV/s to +100 kV/s
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ESD CAUTION
All voltages are relative to their respective ground. Input-to-output voltage is defined as GNDA - GND1 or GNDB - GND1. Output differential voltage is defined as GNDA - GNDB. 4 Refers to common-mode transients across any insulation barrier. Common-mode transients exceeding the absolute maximum ratings may cause latch-up or permanent damage.
Table 7. Maximum Continuous Working Voltage1
Parameter AC Voltage, Bipolar Waveform AC Voltage, Unipolar Waveform Basic Insulation DC Voltage Basic Insulation
1
Max 565 700 700
Unit V peak V peak V peak V peak
Constraint 50-year minimum lifetime Analog Devices recommended maximum working voltage Analog Devices recommended maximum working voltage
Refers to continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more details.
Rev. 0 | Page 5 of 12
ADUM1234 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VIA 1 VIB 2 VDD1 3 GND1 4 DISABLE 5 NC 6 NC 7 VDD1 8
16 15
VDDA VOA GNDA
ADUM1234
14 13
NC TOP VIEW (Not to Scale) 12 NC
11 10 9
VDDB VOB
06920-002
GNDB
NC = NO CONNECT
Figure 2. Pin Configuration
Table 8. ADUM1234 Pin Function Descriptions
Pin No. 1 2 3 1 , 81 4 5 6, 7, 12 2 , 132 9 10 11 14 15 16
1
Mnemonic VIA VIB VDD1 GND1 DISABLE NC GNDB VOB VDDB GNDA VOA VDDA
Description Logic Input A. Logic Input B. Input Supply Voltage, 4.5 V to 5.5 V. Ground Reference for Input Logic Signals. Input Disable. Disables the isolator inputs and refresh circuits. Outputs take on default low state. No Connect. Ground Reference for Output B. Output B. Output B Supply Voltage, 12 V to 18 V. Ground Reference for Output A. Output A. Output A Supply Voltage, 12 V to 18 V.
2
Pin 3 and Pin 8 are internally connected. Connecting both pins to VDD1 is recommended. Pin 12 and Pin 13 are floating and should be left unconnected.
Table 9. Truth Table (Positive Logic)
VIA/VIB Input H L X X VDD1 State Powered Powered Unpowered Powered DISABLE L L X H VOA/VOB Output H L L L Notes
Output returns to input state within 1 s of VDD1 power restoration.
Rev. 0 | Page 6 of 12
ADUM1234 TYPICAL PERFOMANCE CHARACTERISTICS
7 6 5 4 3 2 1 0
PROPAGATION DELAY (ns)
115
114 CH. B, FALLING EDGE
INPUT CURRENT (mA)
113
112 CH. A, FALLING EDGE 111 CH. A, RISING EDGE CH. B, RISING EDGE
110
06920-006
0
2
4 6 DATA RATE (Mbps)
8
10
15 OUTPUT SUPPLY VOLTAGE (V)
18
Figure 3. Typical Input Supply Current Variation with Data Rate
18 16
Figure 6. Typical Propagation Delay Variation with Output Supply Voltage (Input Supply Voltage = 5.0 V)
115
114 14 12 10 8 6 4 2
06920-007
PROPAGATION DELAY (ns)
OUTPUT CURRENT (mA)
113
CH. B, FALLING EDGE
112
CH. A, FALLING EDGE
111 CH. A, RISING EDGE 110 CH. B, RISING EDGE
06920-010
0
0
2
4 6 DATA RATE (Mbps)
8
10
109 4.5
5.0 INPUT SUPPLY VOLTAGE (V)
5.5
Figure 4. Typical Output Supply Current Variation with Data Rate
120
Figure 7. Typical Propagation Delay Variation with Input Supply Voltage (Output Supply Voltage = 15.0 V)
PROPAGATION DELAY (ns)
115
110
105
-20
0
20 40 60 TEMPERATURE (C)
80
100
120
Figure 5. Typical Propagation Delay Variation with Temperature
06920-008
100 -40
Rev. 0 | Page 7 of 12
06920-009
109 12
ADUM1234 APPLICATION NOTES
COMMON-MODE TRANSIENT IMMUNITY
TRANSIENT IMMUNITY (kV/s)
300
In general, common-mode transients consist of linear and sinusoidal components. The linear component of a commonmode transient is given by VCM, linear = (V/t)t where V/t is the slope of the transient shown in Figure 11 and Figure 12. The transient of the linear component is given by dVCM/dt = V/t Figure 8 characterizes the ability of the ADUM1234 to operate correctly in the presence of linear transients. The data is based on design simulation and is the maximum linear transient magnitude that the ADUM1234 can tolerate without an operational error. This data shows a higher level of robustness than what is listed in Table 5 because the transient immunity values obtained in Table 5 use measured data and apply allowances for measurement error and margin.
400 350
250 BEST-CASE PROCESS VARIATION 200
150
100
50 WORST-CASE PROCESS VARIATION 0 250 500 750 1000 1250 FREQUENCY (MHz) 1500 1750 2000
06920-012
0
Figure 9. Transient Immunity (Sinusoidal Transients), 27C Ambient Temperature
250
200
TRANSIENT IMMUNITY (kV/s)
BEST-CASE PROCESS VARIATION 150
TRANSIENT IMMUNITY (kV/s)
300 250 200 150 100 50
BEST-CASE PROCESS VARIATION
100
50
0
250
500
750 1000 1250 FREQUENCY (MHz)
1500
1750
2000
Figure 10. Transient Immunity (Sinusoidal Transients), 100C Ambient Temperature
-20 0 20 40 TEMPERATURE (C) 60 80 100
06920-011
0 -40
15V
VDD1 GND1 VDDA AND VDDB
5V
Figure 8. Transient Immunity (Linear Transients) vs. Temperature
15V
The sinusoidal component (at a given frequency) is given by VCM, sinusoidal = V0sin(2ft) where: V0 is the magnitude of the sinusoidal. f is the frequency of the sinusoidal. The transient magnitude of the sinusoidal component is given by dVCM/dt = 2f V0 Figure 9 and Figure 10 characterize the ability of the ADUM1234 to operate correctly in the presence of sinusoidal transients. The data is based on design simulation and is the maximum sinusoidal transient magnitude (2f V0) that the ADUM1234 can tolerate without an operational error. Values for immunity against sinusoidal transients are not included in Table 5 because measurements to obtain such values have not been possible.
15V VDDA /VDDB GNDA/GNDB VDDB /VDDA GNDA/GNDB
VDDA AND VDDB GNDA AND GNDB VDD1 GND1
15V
V t
GNDA AND GND B
5V
V t
15V
06920-003
Figure 11. Common-Mode Transient Immunity Waveforms, Input to Output
15V VDDA /VDDB GNDA/GNDB VDDB /VDDA V t GNDB/GNDA 15V 15V
V 15V t 15V
06920-004
Figure 12. Common-Mode Transient Immunity Waveforms, Between Outputs
Rev. 0 | Page 8 of 12
06920-013
WORST-CASE PROCESS VARIATION
0
WORST-CASE PROCESS VARIATION
ADUM1234
VDDA /VDDB VDD t
06920-005
determines the maximum working voltage recommended by Analog Devices. In the case of unipolar ac or dc voltage, the stress on the insulation is significantly lower. This allows operation at higher working voltages while still achieving a 50-year service life. The working voltages listed in Table 7 can be applied while maintaining the 50-year minimum lifetime provided the voltage conforms to either the unipolar ac or dc voltage cases. Any cross insulation voltage waveform that does not conform to Figure 15 or Figure 16 should be treated as a bipolar ac waveform and its peak voltage should be limited to the 50-year lifetime voltage value listed in Table 7. Note that the voltage presented in Figure 15 is shown as sinusoidal for illustration purposes only. It is meant to represent any voltage waveform varying between 0 V and some limiting value. The limiting value can be positive or negative, but the voltage cannot cross 0 V.
RATED PEAK VOLTAGE 0V
06920-014
VDDA /VDDB GNDA/GNDB GNDA/GNDB
Figure 13. Transient Immunity Waveforms, Output Supplies
INSULATION LIFETIME
All insulation structures eventually break down when subjected to voltage stress over a sufficiently long period. The rate of insulation degradation depends on the characteristics of the voltage waveform applied across the insulation. In addition to the testing performed by the regulatory agencies, Analog Devices conducts an extensive set of evaluations to determine the lifetime of the insulation structure within the ADUM1234. Analog Devices performs accelerated life testing using voltage levels higher than the rated continuous working voltage. Acceleration factors for several operating conditions are determined. These factors allow calculation of the time to failure at the actual working voltage. Table 7 summarizes the peak voltages for 50 years of service life for a bipolar ac operating condition and the maximum Analog Devices recommended working voltages. In many cases, the approved working voltage is higher than the 50-year service life voltage. Operation at these high working voltages can lead to shortened insulation life in some cases. The insulation lifetime of the ADUM1234 depends on the voltage waveform type imposed across the isolation barrier. The iCoupler insulation structure degrades at different rates depending on whether the waveform is bipolar ac, unipolar ac, or dc. Figure 14, Figure 15, and Figure 16 illustrate these different isolation voltage waveforms. Bipolar ac voltage is the most stringent environment. The goal of a 50-year operating lifetime under the ac bipolar condition
Figure 14. Bipolar AC Waveform
RATED PEAK VOLTAGE
06920-015
0V
Figure 15. Unipolar AC Waveform
RATED PEAK VOLTAGE
06920-016
0V
Figure 16. DC Waveform
Rev. 0 | Page 9 of 12
ADUM1234 OUTLINE DIMENSIONS
10.50 (0.4134) 10.10 (0.3976)
16 9
7.60 (0.2992) 7.40 (0.2913)
1 8
10.65 (0.4193) 10.00 (0.3937)
1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122)
2.65 (0.1043) 2.35 (0.0925)
0.75 (0.0295) 0.25 (0.0098)
8 0 0.33 (0.0130) 0.20 (0.0079)
45
SEATING PLANE
1.27 (0.0500) 0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-013- AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 17. 16-Lead Standard Small Outline Package [SOIC_W] Wide Body (RW-16) Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model ADUM1234BRWZ 1 ADUM1234BRWZ-RL1, 2
1 2
No. of Channels 2 2
Output Peak Current (A) 0.1 0.1
Output Voltage (V) 15 15
032707-B
Temperature Range -40C to +105C -40C to +105C
Package Description 16-Lead SOIC_W 16-Lead SOIC_W
Package Option RW-16 RW-16
Z = RoHS Compliant Part. 13-inch tape and reel option (1,000 units).
Rev. 0 | Page 10 of 12
ADUM1234 NOTES
Rev. 0 | Page 11 of 12
ADUM1234 NOTES
(c)2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06920-0-7/07(0)
Rev. 0 | Page 12 of 12

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