Analog Devices Inc. AD8422ARZ-R7 - Semicone IC Supplier

Mfr	Analog Devices Inc.
Device Type	Instrumentation Amplifier
Number of Channels	1
Supply Voltage	Single: 4.6 V to 36 V, Dual: ±2.3 V to ±18 V
-3dB Bandwidth	2.2 MHz
Slew Rate	0.8 V/µs
Settling Time	13 µs
Output Type	Rail-to-Rail (RRO)
Output Current (per Channel)	20 mA
Power Supply Rejection Ratio (PSRR)	90 dB
Input Offset Voltage (Vos)	60 µV
Input Bias Current (Ib)	500 pA
Common Mode Rejection Ratio (CMRR)	146 dB
Quiescent Current (Iq)	330 µA
Operating Temperature	-40°C to +85°C
Package	8-SOIC
Mounting Type	Surface Mount
Compliance	RoHS Compliant

The AD8422ARZ‑R7 is a high‑performance, low‑power, rail‑to‑rail precision instrumentation amplifier manufactured by Analog Devices, supplied in an 8‑lead SOIC‑N surface‑mount package on 7‑inch tape‑and‑reel for automated assembly. Designed as an upgraded successor to classic industry‑standard instrumentation amplifiers, this device delivers outstanding DC precision and excellent AC performance while consuming very little quiescent current, making it well suited for battery‑powered and multi‑channel measurement systems.

It supports adjustable gain from 1 to 1000 set via an external single resistor, integrates robust 40 V input overvoltage protection, and features ultra‑low input bias current to minimize signal errors when interfacing with high‑impedance sensors. With wide single‑supply voltage coverage of 4.6 V‑36 V and dual‑supply operation from ±2.3 V to ±18 V, it achieves high common‑mode rejection ratio, low noise and minimal drift over the full industrial temperature range of ‑40 °C to +85 °C for reliable long‑term data acquisition results.
Applications
The AD8422ARZ‑R7 serves as a high‑quality signal conditioning amplifier across multiple industrial, medical and portable electronic fields, including medical vital‑signal measurement instruments, industrial process control modules, strain‑gage bridge sensing circuits, precision data‑acquisition equipment, isolated multi‑channel sensor interfaces, portable battery‑powered test meters, weight measurement transducers, pressure sensor signal amplifiers, and laboratory measurement instrumentation requiring low‑drift, high‑impedance sensor input support.
FAQ
Q: What is the core advantage of choosing AD8422ARZ‑R7 over older instrumentation amplifiers?
A: It balances high precision, wide bandwidth and far‑lower quiescent power draw, making it ideal for both high‑accuracy fixed installations and energy‑sensitive portable devices.
Q: Is external gain‑setting resistor required?
A: Gain of 1 can be configured without an external resistor; gains above 1 need one external resistor between the RG pins.
Alternative precision in‑amp parts
1. AD8422BRZ‑R7: Higher‑precision grade variant of AD8422 with tighter gain error and lower offset drift specifications for ultra‑high‑accuracy measurement requirements.
2. INA128P: Low‑power precision instrumentation amplifier from Texas Instruments, offering wide gain range as a cross‑brand alternative for sensor signal conditioning.
3. AD620ARZ: Classic low‑cost instrumentation amplifier; a legacy alternative with slightly higher power consumption for cost‑optimized designs.