AD8422 Series

High Performance, Low Power, Rail-to-Rail Precision Instrumentation Amplifier

Catalog

High Performance, Low Power, Rail-to-Rail Precision Instrumentation Amplifier

Part	Voltage - Input Offset	Package / Case	Package / Case [y]	Package / Case [x]	Amplifier Type	Number of Circuits	Voltage - Supply Span (Max) [Max]	Current - Output / Channel	Voltage - Supply Span (Min) [Min]	Output Type	Slew Rate	Supplier Device Package	Current - Input Bias	-3db Bandwidth	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Current - Supply	Package / Case [custom]	Package / Case
Analog Devices AD8422ARZ-R7	60 µV	8-SOIC	3.9 mm	0.154 in	Instrumentation	1	36 V	20 mA	4.6 V	Rail-to-Rail	0.8 V/µs	8-SOIC	500 pA	2.2 MHz	85 °C	-40 °C	Surface Mount	300 µA
Analog Devices AD8422ARMZ	70 µV	8-MSOP 8-TSSOP			Instrumentation	1	36 V	20 mA	4.6 V	Rail-to-Rail	0.8 V/µs	8-MSOP	500 pA	2.2 MHz	85 °C	-40 °C	Surface Mount	300 µA	0.118 in	3 mm
Analog Devices AD8422BRMZ-RL	50 µV	8-MSOP 8-TSSOP			Instrumentation	1	36 V	20 mA	4.6 V	Rail-to-Rail	0.8 V/µs	8-MSOP	200 pA	2.2 MHz	85 °C	-40 °C	Surface Mount	300 µA	0.118 in	3 mm
Analog Devices AD8422BRMZ	50 µV	8-MSOP 8-TSSOP			Instrumentation	1	36 V	20 mA	4.6 V	Rail-to-Rail	0.8 V/µs	8-MSOP	200 pA	2.2 MHz	85 °C	-40 °C	Surface Mount	300 µA	0.118 in	3 mm
Analog Devices AD8422BRMZ-R7	50 µV	8-MSOP 8-TSSOP			Instrumentation	1	36 V	20 mA	4.6 V	Rail-to-Rail	0.8 V/µs	8-MSOP	200 pA	2.2 MHz	85 °C	-40 °C	Surface Mount	300 µA	0.118 in	3 mm

Catalog

High Performance, Low Power, Rail-to-Rail Precision Instrumentation Amplifier

Key Features

• Low power: 368 μA maximum quiescent current

• Rail-to-rail output

• Low noise and distortion8 nV/√Hz maximum input voltage noise at 1 kHz0.15 μV p-p RTI noise (G = 100)0.5 ppm nonlinearity with 2 kΩ load (G = 1)

• 8 nV/√Hz maximum input voltage noise at 1 kHz

• 0.15 μV p-p RTI noise (G = 100)

• 0.5 ppm nonlinearity with 2 kΩ load (G = 1)

• Excellent ac specifications80 dB minimum CMRR at 10 kHz (G = 1)2.2 MHz bandwidth (G = 1)

• 80 dB minimum CMRR at 10 kHz (G = 1)

• 2.2 MHz bandwidth (G = 1)

• High precision dc performance (AD8422BRZ)150 dB minimum CMRR (G = 1000)0.04% maximum gain error (G = 1000)0.3 μV/°C maximum input offset drift0.5 nA maximum input bias current

• 150 dB minimum CMRR (G = 1000)

• 0.04% maximum gain error (G = 1000)

• 0.3 μV/°C maximum input offset drift

• 0.5 nA maximum input bias current

• Wide supply range4.6 V to 36 V single supply±2.3 V to ±18 V dual supply

• 4.6 V to 36 V single supply

• ±2.3 V to ±18 V dual supply

• Input overvoltage protection: 40 V from opposite supply

• Gain range: 1 to 1000

• Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N

Description

The AD8422 is a high precision, low power, low noise, rail-to-rail instrumentation amplifier that delivers the best performance per unit microampere in the industry. The AD8422 processes signals with ultralow distortion performance that is load independent over its full output range.The AD8422 is the third generation development of the industry standardAD620. The AD8422 employs new process technologies and design techniques to achieve higher dynamic range and lower errors than its predecessors, while consuming less than one-third of the power. The AD8422 uses the high performance pinout introduced by theAD8221.Very low bias current makes the AD8422 error-free with high source impedance, allowing multiple sensors to be multiplexed to the inputs. Low voltage noise and low current noise make the AD8422 an ideal choice for measuring a Wheatstone bridge.The wide input range and rail-to-rail output of the AD8422 bring all of the benefits of a high performance in-amp to single-supply applications. Whether using high or low supply voltages, the power savings make the AD8422 an excellent choice for high channel count or power sensitive applications.The AD8422 uses robust input protection that ensures reliability without sacrificing noise performance. The AD8422 has high ESD immunity, and the inputs are protected from continuous voltages up to 40 V from the opposite supply rail.A single resistor sets the gain from 1 to 1000. The reference pin can be used to apply a precise offset to the output voltage.The AD8422 is specified from −40°C to +85°C for the 8-lead MSOP and the 8-lead SOIC_N and from −40°C to +125°C for the 8-lead LFCSP.APPLICATIONSMedical instrumentationIndustrial process controlsStrain gagesTransducer interfacesPrecision data acquisition systemsChannel-isolated systemsPortable instrumentation