LM2903 Low Power Low Offset Dual Voltage Comparator

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LM2903 consists of two independent precision voltage comparators with an offset voltage specification as low as 2.0 mV, designed specifically to operate from a single power supply over a wide range of voltages.

The IC eliminates the requirement of external biasing parts/components in various applications. The IC is also calibrated to be used over a wide range of commercial, industrial, and military temperature ranges. LM2903 always comes in an 8 pin hermetically sealed, dual inline IC packaging (DIP). The IC is designed with conformity with low-power, bandwidth, and high stability in order to operate with a single power supply over extensive operating voltage ranges.

Voltage Comparator

A voltage comparator can be defined as an electronic circuit that can compare two input voltages and distinguish which one of them is at a higher level of amplitude.

There are two main types of voltage comparators:

Non inverting Comparators
Inverting Comparators

LM2903 Pinout

LM2903 Pin Configuration

Pin No	Pin Name	Description
1	OUTPUT A	Output Of Comparator A
2	INV-INPUT A	Inverting Input Of Comparator A
3	NON-INV-INPUT A	Non Inverting Input Of Comparator A
4	GND	Ground Pin
5	NON-INV-INPUT B	Non Inverting Input Of Comparator B
6	INV-INPUT B	Inverting Input Of Comparator B
7	OUTPUT B	Output Of Comparator B
8	V+	Positive Supply Voltage

Order Codes

Part No	Temp: Range
LM393/LM393A	0˚C to +70˚C
LM293/LM293A	−25˚C to +85˚C
LM193/LM193A	−55˚C to +125˚C
LM2903	−40˚C to +85˚C

LM2903 Features

Wide supply
- — Voltage range: 2.0V to 36V
- — single or dual supplies: ±1.0V to ±18V
Very low supply current drain (0.4 mA) — independent of supply voltage
Low input biasing current: 25 nA
Low input offset current: ±5 nA
Maximum offset voltage: ±3 mV
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply voltage