Overview
The AD8422ARMZ-R7, produced by Analog Devices Inc., is a high-performance, low-power, rail-to-rail precision instrumentation amplifier. It is designed to deliver exceptional performance per unit microampere, making it an ideal choice for various applications requiring high precision and low power consumption. The AD8422 is the third generation development of the industry standard AD620, employing new process technologies and design techniques to achieve higher dynamic range and lower errors while consuming less power than its predecessors.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Quiescent Current | 338 | 368 | 450 | µA |
| Input Voltage Noise at 1 kHz | 8 | nV/√Hz | ||
| RTI Noise (G = 100) | 0.15 | µV p-p | ||
| Nonlinearity (G = 1, 2 kΩ load) | 0.5 | ppm | ||
| CMRR at 10 kHz (G = 1) | 80 | 50 | dB | |
| Bandwidth (G = 1) | 2.2 | MHz | ||
| Gain Range | 1 | 1000 | ||
| Supply Range (Single Supply) | 4.6 | 36 | V | |
| Supply Range (Dual Supply) | ±2.3 | ±18 | V | |
| Input Overvoltage Protection | 40 | V from opposite supply | ||
| Operating Temperature Range | -40 | 85 | °C (MSOP, SOIC_N) | |
| Operating Temperature Range | -40 | 125 | °C (LFCSP) |
Key Features
- Low power consumption: Maximum quiescent current of 368 µA.
- Rail-to-rail output.
- Low noise and distortion: 8 nV/√Hz maximum input voltage noise at 1 kHz and 0.15 µV p-p RTI noise (G = 100).
- Excellent ac specifications: 80 dB minimum CMRR at 10 kHz (G = 1) and 2.2 MHz bandwidth (G = 1).
- High precision dc performance: 0.5 ppm nonlinearity with 2 kΩ load (G = 1) and 0.04% maximum gain error (G = 1000).
- Wide supply range: 4.6 V to 36 V single supply and ±2.3 V to ±18 V dual supply.
- Input overvoltage protection: Up to 40 V from the opposite supply rail.
- Gain range: 1 to 1000 set by a single resistor.
- Robust input protection with high ESD immunity.
Applications
- Medical instrumentation.
- Industrial process controls.
- Strain gages.
- Transducer interfaces.
- Precision data acquisition systems.
- Channel-isolated systems.
- Portable instrumentation.
Q & A
- What is the maximum quiescent current of the AD8422ARMZ-R7?
The maximum quiescent current is 368 µA. - What is the input voltage noise at 1 kHz for the AD8422?
The input voltage noise at 1 kHz is 8 nV/√Hz. - What is the CMRR at 10 kHz for a gain of 1?
The CMRR at 10 kHz for a gain of 1 is 80 dB. - What is the bandwidth of the AD8422 for a gain of 1?
The bandwidth for a gain of 1 is 2.2 MHz. - What is the gain range of the AD8422?
The gain range is from 1 to 1000, set by a single resistor. - What is the supply range for the AD8422?
The supply range is 4.6 V to 36 V for single supply and ±2.3 V to ±18 V for dual supply. - What is the input overvoltage protection of the AD8422?
The input overvoltage protection is up to 40 V from the opposite supply rail. - What are the typical applications of the AD8422?
Typical applications include medical instrumentation, industrial process controls, strain gages, transducer interfaces, and precision data acquisition systems. - What are the available package types for the AD8422?
The AD8422 is available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N packages. - What is the operating temperature range for the AD8422 in MSOP and SOIC_N packages?
The operating temperature range for the MSOP and SOIC_N packages is -40°C to +85°C.
