The AD623ARZ-R7 from Analog Devices is a low-power precision instrumentation amplifier featuring rail-to-rail output operation and support for both single- and dual-supply systems. It operates from 2.7V to 12V on a single supply or ±2.5V to ±6V on dual supplies, making it suitable for sensor interfaces, thermocouple amplification, industrial process control and low-power data-acquisition systems.
Gain is programmed using only one external resistor. With no external gain resistor, the device operates at G=1, while an external RG resistor allows programmable gains up to 1000 using G = 1 + 100kΩ/RG.
For the A-grade SOIC version used by AD623ARZ-R7, input offset voltage is 25µV typical and 200µV maximum at 25°C. Input bias current is 17nA typical and 25nA maximum. Gain error is typically 0.03% and 0.10% maximum at unity gain, with a 0.35% maximum specification for gains above one.
Common-mode rejection improves with gain. Minimum CMRR is approximately 70dB at G=1, 90dB at G=10 and 105dB at G=100 or G=1000 under the specified 60Hz test conditions. The input common-mode range can extend approximately 150mV below the negative supply rail, supporting low-side and near-ground signal measurements.
Typical input voltage-noise density is 35nV/√Hz at 1kHz, and slew rate is 0.3V/µs. Small-signal bandwidth is approximately 800kHz at G=1, 100kHz at G=10, 10kHz at G=100 and 2kHz at G=1000.
The AD623 is optimized for low-power operation, with typical quiescent current of approximately 305µA on a single supply and 375µA on dual supplies. Specified operating temperature is -40°C to +85°C.
The exact AD623ARZ-R7 is supplied in an 8-lead SOIC package. ADI lists the R7 carrier option as 1000 pieces per reel, and the exact part is currently listed as PRODUCTION.
Key Specifications:
- Brand: Analog Devices / ADI
- Part Number: AD623ARZ-R7
- Product Type: Instrumentation Amplifier
- Architecture: Three-Op-Amp In-Amp
- Output: Rail-to-Rail
- Single-Supply Range: 2.7V to 12V
- Dual-Supply Range: ±2.5V to ±6V
- Gain Range: 1 to 1000
- Gain Setting: One External Resistor
- Gain Equation: G = 1 + 100kΩ/RG
- Gain Error at G=1: 0.03% Typ / 0.10% Max
- Gain Error at G>1: 0.35% Max
- Input Offset Voltage: 25µV Typ
- Input Offset Voltage: 200µV Max at 25°C
- Input Bias Current: 17nA Typ / 25nA Max
- Input Offset Current: 0.25nA Typ / 2nA Max
- Input Voltage Noise: 35nV/√Hz Typ at 1kHz
- Low-Frequency RTI Noise: 3µV p-p at G=1
- CMRR: 70dB Min at G=1
- CMRR: 90dB Min at G=10
- CMRR: 105dB Min at G=100 / 1000
- Input Common-Mode Range: Extends Approx. 150mV Below Negative Rail
- Bandwidth: 800kHz at G=1
- Bandwidth: 100kHz at G=10
- Bandwidth: 10kHz at G=100
- Bandwidth: 2kHz at G=1000
- Slew Rate: 0.3V/µs
- Settling Time: 20µs Typ at G=10 to 0.01%
- Single-Supply Quiescent Current: 305µA Typ / 480µA Max
- Dual-Supply Quiescent Current: 375µA Typ / 550µA Max
- Operating Temperature: -40°C to +85°C
- Package: SOIC-8
- Mounting Type: SMD / SMT
- Packaging: Tape & Reel
- Reel Quantity: 1000 pcs
- Product Status: PRODUCTION.
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