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INTEGRATED CIRCUITS
SA58601; SA58604 Dual and quad operational amplifiers with shunt regulator
Product data Supersedes data of 2001 Oct 03 2002 Nov 08
Philips Semiconductors
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
GENERAL DESCRIPTION
The SA58601 is comprised of a low offset voltage dual operational amplifier and a shunt regulator; the SA58604 combines a low offset voltage quad operational amplifier and shunt regulator. The input offset voltage is typically 200 V. They are used in battery chargers, switching power supplies, and other voltage and current controlled applications. With low input offset voltage, they are well suited for handling current detection signals and other low amplitude signals.
FEATURES Op amp section
APPLICATIONS
* Low supply current: 600 A per amplifier (typical) * Low input offset voltage: 200 V (typical) * Low input offset current: 5 nA (typical) * Low input bias current: 30 nA (typical) * Common mode input: Ground to VCC - 1 V * Operating supply: 2 V to 20 V
Shunt regulator section
* Signal conditioning and sensing amplification * Switching power supply * AC adapter * Battery charger
* Reference voltage: 2.5 V (typical) * Reference voltage fluctuations (-20 to +80 C): 5 mV (typ) * Minimum cathode current: 0.4 mA (typical)
SIMPLIFIED DEVICE DIAGRAM
OUT1
1
14
OUT4
IN1OUT1 1 8 VCC
2
13
IN4-
IN1+ (REF)
3 2.5 V
12
IN4+
IN1-
2
7
OUT2 VCC IN2-
4
11
GND
IN1+ (REF)
3 2.5 V
6
IN2+
5
10
IN3+
GND
4
5
IN2+
IN2-
6
9
IN3-
SA58601D
OUT2
7
8
OUT3
SA58604D
SL01542
Figure 1. Simplified device diagram.
2002 Nov 08
2
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
ORDERING INFORMATION
TYPE NUMBER SA58601D SA58604D PACKAGE NAME SO8 SO14 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm plastic small outline package; 14 leads; body width 4.4 mm TEMPERATURE RANGE -40 to +85 C -40 to +85 C
Part number marking
Each device is marked with three or four lines of alphanumeric codes. The first three letters of the top line designate the product. The fourth letter, represented by `x', is a date tracking code. The remaining lines of characters are internal manufacturing codes. Part number SA58601D SA58604D Marking AGTx AGUx
1 2 3 4 1 2 3 4 5 6 7 13 12 11 14 10 7 6 5 9 8 8
AG T x
AG U x
SA58601D
SA58604D
SL01543
SA58601 PIN CONFIGURATION
TOP VIEW OUT1 IN1- IN1+ (REF) GND 1 2 8 7 VCC OUT2 IN2- IN2+
SA58601 PIN DESCRIPTION
PIN 1 2 3 4 5 6 7 8 SYMBOL OUT1 IN1- IN1+ (REF) GND IN2+ IN2- OUT2 VCC DESCRIPTION Output of Amp 1 Inverting input of Amp 1 Non-inverting input of Amp 1 and reference voltage output Ground Non-inverting input of Amp 2 Inverting input of Amp 2 Output of Amp 2 Positive supply
SO8
3 4 6 5
SL01540
Figure 2. Pin configuration.
SA58604 PIN CONFIGURATION
TOP VIEW OUT1 IN1- IN1+ (REF) VCC IN2+ IN2- OUT2 1 2 3 4 5 6 7 14 13 12 OUT4 IN4- IN4+ GND IN3+ IN3- OUT3
SA58604 PIN DESCRIPTION
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYMBOL OUT1 IN1- IN1+ (REF) VCC IN2+ IN2- OUT2 OUT3 IN3- IN3+ GND IN4+ IN4- OUT4 DESCRIPTION Output of Amp 1 Inverting input of Amp 1 Non-inverting input of Amp 1 and reference voltage output Positive supply Non-inverting input of Amp 2 Inverting input of Amp 2 Output of Amp 2 Output of Amp 3 Inverting input of Amp 3 Non-inverting input of Amp 3 Ground Non-inverting input of Amp 4 Inverting input of Amp 4 Output of Amp 4
SO14
11 10 9 8
SL01541
Figure 3. Pin configuration.
2002 Nov 08
3
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
MAXIMUM RATINGS
SYMBOL VCC VIN Tstg Tamb PD Single supply voltage Input voltage Storage temperature Operating temperature Power dissipation SA58601 SA58604 PARAMETER MIN. -0.3 -0.3 -40 -40 - - MAX. +24 +10 +125 +85 300 350 UNIT V V C C mW mW
ELECTRICAL CHARACTERISTICS
VCC = 5 V; Tamb = 25 C, unless otherwise specified. SYMBOL VCC Op amp VIO IIO Ii(bias) VIN ICC Input offset voltage Input offset current (excluding Amp 1) Input bias current Common mode Input voltage range (excluding Amp 1) Supply current SA58601D SA58604D Gol VOL VOH CMRR PSRR IO(source) IO(sink) Open loop gain LOW-level output voltage HIGH-level output voltage Common mode rejection ratio Power supply rejection ratio Output current source Output current sink RL = RL = RL = RL = - - - - VCC - 1.1 65 65 20 10 0.6 1.2 100 10 VCC - 0.8 85 100 35 20 1.0 2.0 - 100 - - - - - mA mA dB mV V dB dB mA mA - - - 0 0.2 1 50 - 0.9 50 150 VCC - 1.0 mV nA nA V PARAMETER Power supply voltage operating range (Note 1) CONDITIONS MIN. 2.0 TYP. 3.0 MAX. 20 UNIT V
Shunt regulator Vref Vref Imin ZKA Reference voltage Reference voltage fluctuation Minimum cathode current Dynamic impedance Tamb = -40 to +85 C 2.450 - - - 2.500 5 0.4 0.4 2.550 17 1.0 0.7 V mV mA
NOTES: 1. Minimum value of operating voltage is for op amp only.
2002 Nov 08
4
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
TYPICAL CHARACTERIZATION CURVES
VCC = 5 V, Tamb = 25 C, unless otherwise specified.
1.6 1.4 SUPPLY CURRENT, ICC (mA) 1.2 1.0 10
SA58604
OUTPUT VOLTAGE, VO (V)
1
SA58601
0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30
0.1
0.01 0.01 0.1 1 10 100
SUPPLY VOLTAGE, VCC (V)
OUTPUT SINK CURRENT, IO(sink) (mA)
SL01943
SL01944
Figure 4. Supply current versus supply voltage.
4.0 REFERENCE VOLTAGE, Vref (V) 3.5 OUTPUT VOLTAGE, VO (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 0.01 0.1 1 10 100
Figure 5. Output voltage versus sink current.
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0.001
0.01
0.1
1
10
100
OUTPUT SOURCE CURRENT, IO(source) (mA)
CATHODE CURRENT, I(Cathode) (mA)
SL01945
SL01946
Figure 6. Output voltage versus source current.
Figure 7. Reference voltage versus cathode current.
2.490 INPUT OFFSET VOLTAGE, VIO (mV)
0
REFERENCE VOLTAGE, Vref (V)
2.488
-0.05
2.486
-0.10
2.484
-0.15
2.482
-0.20
2.480 -25
0
25
50
75
-0.25 -25
0
25
50
75
AMBIENT TEMPERATURE, Tamb (C)
AMBIENT TEMPERATURE, Tamb (C)
SL01947
SL01948
Figure 8. Reference voltage versus ambient temperature.
Figure 9. Input offset voltage versus ambient temperature.
2002 Nov 08
5
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
TYPICAL CHARACTERIZATION CURVES (continued)
VCC = 5 V, Tamb = 25 C, unless otherwise specified.
5 OPEN LOOP VOLTAGE GAIN, G ol (dB) 1 10 FREQUENCY, f (Hz) 100 1000 120
DYNAMIC IMPEDANCE, Z KA ( )
4
100
80
3
60
2
40
1
20
0
0 0.001 0.01 0.1 1 10 100 1000
FREQUENCY, f (Hz)
SL01949
SL01950
Figure 10. Dynamic impedance versus frequency.
Figure 11. Open loop voltage gain versus frequency.
FUNCTIONAL DESCRIPTION General description
The SA58601 and SA58604 are dual and quad, low power, precision, single supply operational amplifiers with a shunt voltage reference connected to the non-inverting terminal of the first amplifier. The internal circuit diagrams for the amplifiers and reference circuits are shown in Figures 12 and 13. With the ability to operate over a wide supply voltage range of 2 V to 20 V, they may be used in various applications, such as battery chargers, switching power supplies, AC adapters, instrumentation and sense amplifiers.
Shunt regulator
The on-chip shunt regulator circuit has its cathode internally connected to the non-inverting terminal of the first amplifier. The cathode is externally biased by a pull-up resistor. At power supply voltage of 5 V or greater, the reference is set at 2.5 V. Figure 7, "Reference voltage versus cathode current", may be used to determine typical cathode current to achieve a desired reference voltage. The typical minimum cathode current needed for 2.5 V is 400 A. To achieve 2.5 V over voltage and temperature, a cathode current of 1 mA is recommended. For operation at less than 5 V supply voltage, the reference voltage should be set midway between VCC and ground.
Amplifiers
The amplifiers have low input offset voltage of typically 200 V. They are well suited for handling current detection signals and other low amplitude signals. With low supply current of 600 A per amplifier and the ability to operate from a single supply down to 2 V makes them suitable for battery powered applications.
2002 Nov 08
6
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
EQUIVALENT CIRCUITS
VCC
IN+ IN- OUT
GND
SL01539
Figure 12. Amplifier equivalent circuit.
REF
GND
SL01538
Figure 13. Reference/Shunt regulator equivalent circuit.
2002 Nov 08
7
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
APPLICATION INFORMATION Common Mode Rejection (CMR) errors
When used with high resistance sensors, differential amplifiers will have high CMR errors due to their relatively low input impedance. CMR errors also are caused by input resistor mismatch. CMR performance is greatly improved with a configuration that eliminate the effects of external resistance matching errors.
SA58601 instrumentation amplifier
Figure 15 is a SA58601 instrumentation amplifier which has few external parts. The differential gain is expressed as: V OUT + * 1 ) R2 ) 2 R2 Rg R1 (V1 * V2) To achieve minimum gain, R1 = R2; Rg = infinity (open). The minimum gain is approximately -4 to -5. At frequencies above the flat response of the amplifier's gain response, V1 attenuates more than V2. the unequal attenuation causes the signal to unbalance, which reduces CMR at high frequencies. This circuit provides excellent CMR in low voltage, single supply applications. The SA58601 has a internal shunt regulator that is used to provide bias to the non-inverting input of AMP1. To set the reference at 2.5 V, approximately 1 mA of cathode current is required. For VCC of 5 V, the non-inverting input and cathode of the internal shunt regulator (pin 3) is pulled up to VCC. The external pull-up resistor is determined by the following expression: R PU +
VOUT
Biasing of single supply op amps
The resistor-divider biasing network shown in Figure 14 is low cost and keeps the op amp output voltage at VCC/2. However, the op amp's CMR depends entirely upon the RC time constant which is formed by the biasing resistors, RB1 and RB2 and decoupling capacitor, C2. As a rule of thumb, the time constant of the RC biasing network should be 10 times longer than the time constant of the input coupling network (RIN and CIN) to ensure satisfactory CMR.
VCC
1 F
100 nF
RB1 100 k
RIN 100 k RB2 100 k VIN CIN RL C1
( V CC * V ref ) 1 mA
C2
COUT
where: VCC = 5 V Vref = 2.5 V then RPU = 2.5 k Choose the closest standard value of 2.4 k.
SL01951
Rg R2 R1 1 R1 5
Figure 14. Resistor-divider biasing network. Another way to provide the necessary VCC/2 biasing for single supply operation is to use a zener diode shunt regulator. The SA58601 and SA58604 provides a zener diode shunt regulator that is internally connected to the non-inverting input of the AMP1. The shunt regulator reference voltage versus the cathode current is shown in Figure 7. The reference voltage of the internal diode is adjusted by externally adjusting the cathode current. Typically 400 A cathode current provides 2.5 V; values of cathode current less than 200 A provides a lower reference voltage. For example, 5 A provides typically 1.3 V. The recommended cathode current range is from 1 A to 10 mA.
R2 2 VIN1 VIN2 RPU 2.4 k VCC 5V 8 4 3 6 AMP1 AMP2 7 VOUT
VCC
SA58601
GND
SL01952
Figure 15. SA58601 instrumentation amplifier.
2002 Nov 08
8
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
SA58604 instrumentation amplifier
Figure 16 is an instrumentation amplifier using the SA58604 Quad Op Amp with Shunt Regulator. This three op amp configuration provides very high input resistance, matched input resistance, and good bandwidth. The differential gain is expressed in the following equation: V OUT + 1 ) 2Rf (V1 * V2) Rg AMP2 and AMP3 are buffer amplifiers that provide high impedance inputs. Rg is the gain adjust which is common to both amplifiers. When Rg is open, the gain is 1. The large differential gain with respect to the common mode gain available from the first stage buffer amplifiers ensures that the CMRR in the differential amplifier output stage is greatly improved. AMP4 is used as a difference amplifier. The differential amplifier output stage is usually used with low (x2) or unity gain. For unity gain operation, R3 = R4 and are closely matched within 1% or less tolerance. The resistors should have low drift with temperature. The reference voltage, Vref may be sourced from AMP1, as detailed in the biasing section.
Comparator circuit
Figure 17 is an application circuit in the which AMP1 is configured as a comparator. The non-inverting input, IN+ is logic HIGH (internally connected to Vref), and the inverting input, IN- is pulled LOW (to ground), then the the output goes HIGH (VCC - 1.1 V). Conversely, if the inverting input is pulled HIGH (to VCC), then the output goes LOW (see Table 1).
Table 1. Logic table for AMP1
IN+ (Vref) H H IN- L H OUT H L Vout level VCC - 1.1 V 10 mV
VCC 5V
VOUT
2.4 k IN- HIGH SW1 2 IN- LOW Vref 3 6
8 VCC
1
5
7 AMP1 AMP2
VIN1
5 7 6 AMP2 R4 Rg R3 13 R3 Rg 12 R4 9 8 AMP4 14 VOUT
4
GND
SL01953
Figure 17. Comparator configuration, AMP1.
VIN2
10 AMP3
Vref
VCC
4 11
VCC GND
SA58604
SL01954
Figure 16. SA58604 instrumentation amplifier.
2002 Nov 08
9
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
PACKING METHOD
GUARD BAND TAPE REEL ASSEMBLY
TAPE DETAIL
COVER TAPE
CARRIER TAPE
BARCODE LABEL
BOX
SL01305
Figure 18. Tape and reel packing method.
2002 Nov 08
10
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
SO8: plastic small outline package; 8 leads; body width 3.9 mm
pin 1 index
B2 1.73 0.068
4.95 4.80 0.189 0.195 0.51 0.33 0.013 0.020 4.95 4.80 1.27 0.38 0.050 0.015
0.076 0.003
SO8
2002 Nov 08
11
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
SO14: plastic small outline package; 14 leads; body width 3.9 mm; body thickness 1.45 mm
pin 1 index
1.73 0.068
1.45 0.057
0.20 0.008
0.51 0.33 0.020 0.013
8.74 8.53
3.99 3.81
SO14
2002 Nov 08
12
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
REVISION HISTORY
Rev _2 Date 20021108 Description Product data; second version (9397 750 10676). Supersedes SA58601_SA58604_1 of 2001 Oct 03 (9397 750 08957). Engineering Change Notice 853-2287 29165 (date: 20021107). Modifications:
* Add "Typical characterization curves" and "Application information" sections.
_1 20011003 Product data; initial version (9397 750 08957). Engineering Change Notice 853-2287 27197 (date: 20011003).
2002 Nov 08
13
Philips Semiconductors
Product data
Dual and quad operational amplifiers with shunt regulator
SA58601; SA58604
Data sheet status
Level
I
Data sheet status [1]
Objective data
Product status [2] [3]
Development
Definitions
This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN).
II
Preliminary data
Qualification
III
Product data
Production
[1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes in the products--including circuits, standard cells, and/or software--described or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified.
Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
(c) Koninklijke Philips Electronics N.V. 2002 All rights reserved. Printed in U.S.A. Date of release: 11-02
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Document order number:
9397 750 10676
Philips Semiconductors
2002 Nov 08 14

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