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Part: SA58603
Category:
Description: SA58603; High Precision Operational Amplifier,comparator, And Voltage Reference
Company: Philips Semiconductors
Datasheet: Download SA58603 datasheet File size : 70 kB
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INTEGRATED CIRCUITS
SA58603 High precision operational amplifier, comparator, and voltage reference
Product data Supersedes data of 2001 Oct 03 2002 Nov 13
Philips Semiconductors
Philips Semiconductors
Product data
High precision operational amplifier, comparator, and voltage reference
SA58603
GENERAL DESCRIPTION
The SA58603 is comprised of a low voltage, high precision dual operational amplifier, a comparator, and a reference voltage source. The input offset voltage is typically 100 µV with a very low temperature drift of ±1 µV/°C. The SA58603 supply current is typically 100 µA per amplifier and it operates from 1.8 V to 6 V single supply. Having single power supply capability, low current consumption, low offset voltage, low input offset current and low input bias current, the SA58603 is ideal for battery-powered applications and amplification of very small signals. It is excellent for precision amplifiers in gas burners and gas pilot water heaters which use thermal couple heat sensors.
FEATURES General
Reference voltage section
· Functionality to 1.8 V typical · Low supply current: 100 µA per amplifier (typical)
Amplifier section
· Reference voltage: 1.27 V ±50 mV · Reference voltage temperature characteristics: · Output current: 0.3 mA (minimum)
APPLICATIONS
±100 ppm/°C (typical)
· Very low input offset voltage: 100 µV (typical) · Very low input offset drift: ±1 µV/°C (typical) · Low input offset current: 1 nA (typical) · Input bias current: 50 nA (typical) · Open loop gain: 100 dB (typical) · Common mode input includes ground
Comparator section
· Gas burners · Gas water heaters · Tankless gas water heaters
· Input offset voltage: ±1.0 mV (typical) · Low input offset voltage voltage drift (40 to +85 °C): · Input bias current: 25 nA (typical) · Output sink current: 5 mA (minimum)
SIMPLIFIED DEVICE DIAGRAM
VCC 8 AMPLIFIER AOUT 3
±10 µV (typical)
AIN AIN+
2 COMPARATOR 1 R 22 k 7 COMPOUT
1.27 V
4 GND
6 VS
5 COMPIN
SL01536
Figure 1. Simplified device diagram. 2002 Nov 13 2
Philips Semiconductors
Product data
High precision operational amplifier, comparator, and voltage reference
SA58603
ORDERING INFORMATION
TYPE NUMBER NUMBER SA58603D PACKAGE NAME SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm TEMPERATURE RANGE 40 to +85 °C
PIN CONFIGURATION
TOP VIEW AIN+ AIN AOUT GND 1 2 8 7 VCC COMPOUT VS COMIN
SO8
3 4 6 5
SL01535
Figure 2. Pin configuration.
PIN DESCRIPTION
PIN 1 2 3 4 5 6 7 8 SYMBOL AIN+ AIN AOUT GND COMPIN VS COMPOUT VCC DESCRIPTION Non-inverting input of Op Amp. This is a PNP amplifier with the reference voltage as its supply voltage. Inverting input of Op Amp. This is a PNP amplifier with the reference voltage as its supply voltage. Output of Op Amp. This is a NPN emitter follower output with a 22 k internal on-chip pull-down resistor. Its supply voltage is VCC. Ground. Inverting input of Comparator. This is a PNP amplifier with VCC as its positive supply voltage. Reference voltage output. The output reference is typically 1.27 V. The output reference is derived from the series combination of a NPN transistor (configured as a diode with the base shorted to the collector) and a 120 k resistor. Output of Comparator. It is an open collector output stage which requires an external pull-up resistor. Positive supply. Its operating range is 1.8 to 6.0 V.
2002 Nov 13
3
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