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INA121P

FET-Input, Low Power Instrumentation Amplifier

Packaging

Package | PIN: P | 8
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $7.56
10-24 $6.80
25-99 $6.36
100-249 $5.70
250-499 $5.32
500-749 $4.63
750-999 $4.01
1000+ $3.93

Features

  • LOW BIAS CURRENT: ±4pA
  • LOW QUIESCENT CURRENT: ±450µA
  • LOW INPUT OFFSET VOLTAGE: ±200µV
  • LOW INPUT OFFSET DRIFT: ±2µV/°C
  • LOW INPUT NOISE: 20nV/sqrt(Hz) at f = 1kHz (G =100)
  • HIGH CMR: 106dB
  • WIDE SUPPLY RANGE: ±2.25V to ±18V
  • LOW NONLINEARITY ERROR: 0.001% max
  • INPUT PROTECTION TO ±40V
  • 8-PIN DIP AND SO-8 SURFACE MOUNT

Texas Instruments  INA121P

The INA121 is a FET-input, low power instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general purpose applications. Low bias current (±4pA) allows use with high impedance sources.

Gain can be set from 1V to 10,000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage.

The INA121 is laser-trimmed for very low offset voltage (±200µV), low offset drift (±2µV/°C), and high common-mode rejection (106dB at G = 100). It operates on power supplies as low as ±2.25V (+4.5V), allowing use in battery operated and single 5V systems. Quiescent current is only 450µA.

Package options include 8-pin plastic DIP and SO-8 surface mount. All are specified for the -40°C to +85°C industrial temperature range.