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AD8221ARMZ-R7

Low-cost instrumentation amp, G=1-1000, MSOP-8

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Manufacturer Part：

AD8221ARMZ-R7

Package：

MSOP-8 (3.0 x 3.0 mm)

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Description

Product Overview

The AD8221ARMZ-R7 from Analog Devices is a low-cost, high-performance instrumentation amplifier in an MSOP-8 package. With a single external resistor setting gains from 1 to 1000, 0.4uV typical offset, 0.25uV/C drift, and 80dB CMRR at G=1, it is ideal for precision sensor signal conditioning in industrial and medical applications.

Key Specifications

Gain Range 1 to 1000 (external resistor)
Offset Voltage 0.4uV typical (RTI, G=1)
Offset Drift 0.25uV/C typical (RTI, G=1)
Input Bias Current 0.4nA typical
CMRR 80dB @ G=1, 90dB @ G=10, 110dB @ G=100
Bandwidth 825kHz @ G=1, 1.5MHz @ G=10
Slew Rate 1.2V/us @ G=1
Voltage Noise 8nV/sqrtHz @ G=1, 1kHz
Supply Voltage +/-2.3V to +/-18V
Supply Current 0.9mA typical
Operating Temp -40 to +85 C
Package MSOP-8 (3.0 x 3.0 mm)

Features

  • Gain set by single external resistor (1-1000)
  • 0.4uV typical offset with 0.25uV/C drift
  • 80dB CMRR at unity gain
  • 825kHz bandwidth at G=1
  • Low input bias current of 0.4nA
  • +/-18V wide supply range

Applications

  • Bridge transducer signal conditioning
  • Medical ECG/EEG front-ends
  • Industrial process control
  • Data acquisition systems

The AD8221ARMZ-R7 from Analog Devices is a low-cost, high-performance instrumentation amplifier in an MSOP-8 package. With a single external resistor setting gains from 1 to 1000, 0.4uV typical offset, 0.25uV/C drift, and 80dB CMRR at G=1, it is ideal for precision sensor signal conditioning in industrial and medical applications.

The AD8221ARMZ-R7 operates as described in the product overview. Key subsystems include the input stage, processing/gain stage, output stage, and protection circuitry as detailed in the datasheet.

Pin Name Type Description
1 -IN Input Inverting input
2 RG I/O Gain resistor terminal
3 RG I/O Gain resistor terminal
4 +IN Input Non-inverting input
5 V- Power Negative supply
6 REF Input Reference voltage
7 VOUT Output Amplifier output
8 V+ Power Positive supply
  • Bridge transducer signal conditioning
  • Medical ECG/EEG front-ends
  • Industrial process control
  • Data acquisition systems
Model Manufacturer Package Notes
AD8226ARMZ ADI MSOP-8 Lower cost, wider supply
INA128U TI SOIC-8 Pin-compatible in SOIC
INA828AIDR TI SOIC-8 Lower noise, higher BW
AD620ARZ ADI SOIC-8 Classic in-amp, higher Iq
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