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Instrumentation Amplifier 1 Circuit 8-SOIC

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INA821IDR General Description

The INA821 is a high-precision instrumentation amplifier that offers low power consumption and operates over a wide single-supply or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device has high precision as a result of super-beta input transistors, which provide low input offset voltage, offset voltage drift, input bias current, and input voltage and current noise. Additional circuitry protects the inputs against overvoltage up to ±40 V.

The INA821 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 92 dB across the full input common-mode range. The device is designed for low-voltage operation from a 4.5-V single supply, and dual supplies up to ±18 V.

The INA821 is available in 8-pin SOIC, VSSOP, and WSON packages, and is specified over the –40°C to +125°C temperature range.

Texas Instruments, Inc Inventory

Key Features

  • Low offset voltage: 10 µV (typ), 35 µV (max)
  • Gain drift: 5 ppm/°C (G = 1),
    35 ppm/°C (G > 1) (max)
  • Noise: 7 nV/√Hz
  • Bandwidth: 4.7 MHz (G = 1), 290 kHz (G = 100)
  • Stable with 1-nF capacitive loads
  • Inputs protected up to ±40 V
  • Common-mode rejection: 112 dB, G = 10 (min)
  • Power supply rejection: 110 dB, G = 1 (min)
  • Supply current: 650 µA (max)
  • Supply range:
    • Single-supply: 4.5 V to 36 V
    • Dual-supply: ±2.25 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Packages: 8-pin SOIC, VSSOP, and WSON
Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory


Category Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps Mfr Texas Instruments
Series - Package Tape & Reel (TR)Cut Tape (CT)Digi-Reel®
Product Status Active Amplifier Type Instrumentation
Number of Circuits 1 Output Type -
Slew Rate 2V/µs -3db Bandwidth 4.7 MHz
Current - Input Bias 150 pA Voltage - Input Offset 10 µV
Current - Supply 600µA Current - Output / Channel 20 mA
Voltage - Supply Span (Min) 4.5 V Voltage - Supply Span (Max) 36 V
Operating Temperature -40°C ~ 125°C (TA) Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) Supplier Device Package 8-SOIC
Base Product Number INA821 Number of channels 1
Vs (max) (V) 36 Vs (min) (V) 4.5
Input offset (±) (max) (µV) 35 Voltage gain (min) (V/V) 1
Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 7
Features Overvoltage protection, Small Size, Super-beta CMRR (min) (dB) 136
Input offset drift (±) (max) (V/°C) 0.0000004 Input bias current (±) (max) (nA) 0.5
Iq (typ) (mA) 0.6 Bandwidth at min gain (typ) (MHz) 4.7
Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125
Rating Catalog Type Resistor
Gain nonlinearity (±) (max) (%) 0.0015 Output swing headroom (to negative supply) (typ) (V) 0.15
Output swing headroom (to positive supply) (typ) (V) -0.15 Input common mode headroom (to negative supply) (typ) (V) 2
Input common mode headroom (to positive supply) (typ) (V) -2 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.14
Pin Count 8 Package Category Small Outline Packages
Released Date Jan 16, 2020 Last Modified Date Mar 7, 2023 4:10 PM UTC

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Ratings and Reviews

A**n 10/30/2022

Very not fast but everything came. Delivery to 63 regions almost a month. i recommend

Z**e 01/17/2022

For these pennies all super

M**i 11/27/2021

Full compliance with description and image. Went, or rather crawled, two weeks.

B**n 10/01/2020

Fast shipping and shipping. Everything works. Thank you!Lead acid, namely calcium batteries should not discharge less than to 11.8 v, otherwise they begin to lose their capacity. Usually inverters allow you to discharge the battery to 10 v which is very good (and good for manufacturers). To disconnect the load, you need to buy the relay at 220 v and connect this relay at the output of the inverter (load in the house). So the inverter will be able to charge the batteries after turning off the load and turning on the gasoline generator.



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Availability: 4553 PCS

Qty. Unit Price(USD) Ext. Price
1+ $2.933 $2.93
10+ $2.549 $25.49
30+ $2.319 $69.57
100+ $2.088 $208.80
500+ $1.981 $990.50
1000+ $1.933 $1,933.00

The prices below are for reference only.