LM139 series consists of four independent precision voltage comparators with an offset voltage specification as low as 2 mV max for all four comparators. The IC has a wide range of working conditions a wide range of working voltages and possesses direct interfacing capability with almost every PMOS, CMOS, and NMOS device. Moreover, the IC offers a wide array of features such as high noise immunity, ESD barring/reduction, and exceptionally low power dissipation.
Voltage Comparator
A voltage comparator is a simple electronic configuration, that compares two voltages at two different levels, and then switches the output to wither LOW or HIGH state with respect to a voltage that is at a higher level then the other. In other words, a voltage comparator compares the magnitude of two voltage inputs and determines which is the largest of the two. There are two main types of voltage comparators:
- Non inverting Comparators
- Inverting Comparators
LM139 Pinout
LM139 Pin Configuration
Pin No | Pin Name | Description |
---|---|---|
1 | OUTPUT 2 | Output Of Comparator 2 |
2 | OUTPUT 1 | Output Of Comparator 1 |
3 | V+ | Positive Supply |
4 | INV-INPUT 1 | Inverting Input Of Comparator 1 |
5 | NON-INV-INPUT 1 | Non Inverting Input Of Comparator 1 |
6 | INV-INPUT 2 | Inverting Input Of Comparator 2 |
7 | NON-INV-INPUT 2 | Non Inverting Input Of Comparator 2 |
8 | INV-INPUT 3 | Inverting Input Of Comparator 3 |
9 | NON-INV-INPUT 3 | Non Inverting Input Of Comparator 3 |
10 | INV-INPUT 4 | Inverting Input Of Comparator 4 |
11 | NON-INV-INPUT 4 | Non Inverting Input Of Comparator 4 |
12 | GND | Ground Pin |
13 | OUTPUT 4 | Output Of Comparator 4 |
14 | OUTPUT 3 | Output Of Comparator 3 |
Order Codes
Part No | Temp: Range |
---|---|
LM139/LM139A | −55˚C to +125˚C |
LM239/LM239A | −25˚C to +85˚C |
LM339/LM339A | 0˚C to +70˚C |
LM139 Features
- Wide supply voltage range
- LM139/139A Series 2 to 36 VDC or ±1 to ±18 VDC
- Very low supply current drain (0.8 mA) — independent of supply voltage
- Low input biasing current: 25 nA
- Low input offset current: ±5 nA
- Offset voltage: ±3 mV
- Input common-mode voltage range includes GND
- Differential input voltage range equal to the power supply voltage
- Low output saturation voltage: 250 mV at 4 mA
Application
- Limit comparators
- Simple analog to digital converters
- Pulse
- Square wave
- Time delay generators
- Wide range VCO
- MOS clock timers
- Multivibrators
- High voltage digital logic gates
LM139 Datasheet
You can download this datasheet for LM139 Low Power Quad Voltage Comparator from the link given below:
See Also: CD4584 Hex Schmitt Trigger – Datasheet | CD4536 Programmable Timer – Datasheet | CD4075 Triple 3-Input OR Gate – Datasheet