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NTE922 Voltage Comparator

[Click the image to enlarge it]

The NTE922 is a very old voltage comparator that has become absolute but yet popular.  It has an input current nearly a thousand times lower than devices like the NTE910 or NTE910D. NTE922 designed to operate over a wider range of supply voltages, from standard ±15V op-amp supplies down to the single 5V supply used for IC logic.

 

Pin Description of NTE922:

Pin Number

Pin Name

Description

1

GROUND

Ground pin

2

Non-Inverting Input (IN+)

The Non-Inverting Pin of the comparator gives a variable  voltage to compare

3

Inverting Input (IN-)

The Inverting pin is also given a fixed voltage which is compared with the (IN+)

4

Ground (VCC-)

Ground pin connected to the case

5

Input Offset

Input offset pin of comparator

6

Input offset/Strobe

This pin can be used to turn off the output stage

7

OUTPUT

 Output Pin

8

VCC+

Provide the operating voltage for the Op-Amp.

 

NTE922 Specifications:

  • Operates from single 5V supply
  • Input current: 150nA max. over temperature
  • Offset current: 20nA max. over temperature
  • Differential input voltage range: ±30V
  • Power consumption: 135mW at ± 15V
  • Available in 8–Lead Metal Can, Mini DIP, and SOIC Packages

Note:  Complete Technical Details can be found at the NTE922 datasheet give at the end of this page.

 

Equivalent for NTE922: LT111A, LM311

Alternatives Comparator Op-Amp IC: LM741, LM358, LM339, LM324

 

Where to use the NTE922 Comparator Op-Amp:

NTE922 is used in applications where a comparison between two voltage signals is required. The output pin of this op-amp can drive loads up to 50V and 50mA which is suitable for driving most of the TTL, MOS and RTL loads.  The transistor can also make the Load to be isolated from the system ground. The comparator is popular among makers and engineers for being low cost and good performance. The device response is also fast enough to satisfy many applications. So if you are looking for a Voltage comparator to drive loads of these specifications then this IC might be the right choice for you.

 

How to use NTE922:

To use the NTE922 IC connect the VCC+ (pin 8) is to +5V supply voltage and the VCC- (pin 4) to ground to hold it at 0V potential. Like all voltage Comparators, the NTE922 also has an Inverting Pin and a Non-Inverting Pin. If the voltage at the Non-Inverting Terminal (pin 2) is high than the Inverting Terminal (pin 3) the output (pin 7) will also be high else the output will be low. The pins 5 and 6 on the Op-amp are used to set the balance voltage if you want to manually adjust the DC-Offset voltage. Normally these pins are not used since the Input Offset itself is much better controlled. When not in use the pins 5 and 6 should be shorted.

 

Applications of NTE922

  • Voltage Comparator circuits
  • Can drive Relay, Lamp, Motor Etc
  • Zero-Crossing detector
  • Peak voltage Detector
  • High Voltage protection/Warning
  • Oscillator circuits

 

2D-Model of NTE922:

Dimensions for NTE922 is given below.

 

NTE922 Voltage Comparator Dimensions

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