Overview
The AD8422ARZ-RL, 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 high channel count or power-sensitive applications. The AD8422 employs advanced process technologies and design techniques to achieve higher dynamic range and lower errors compared to its predecessors, while consuming less than one-third of the power.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Quiescent Current | 368 | µA | ||
| Input Voltage Noise at 1 kHz | 8 | nV/√Hz | ||
| RTI Noise (G = 100) | 0.15 | µV p-p | ||
| Nonlinearity with 2 kΩ Load (G = 1) | 0.5 | ppm | ||
| Bandwidth (G = 1) | 2.2 | MHz | ||
| CMRR at 10 kHz (G = 1) | 80 | dB | ||
| 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 (for MSOP and SOIC_N) | |
| Operating Temperature Range (LFCSP) | -40 | 125 | °C |
Key Features
- Low power consumption: 368 µA maximum quiescent current
- Rail-to-rail output
- Low noise and distortion: 8 nV/√Hz maximum input voltage noise at 1 kHz
- High precision DC performance: 0.5 ppm nonlinearity with 2 kΩ load (G = 1)
- Excellent AC specifications: 2.2 MHz bandwidth (G = 1), 80 dB minimum CMRR at 10 kHz (G = 1)
- Wide supply range: 4.6 V to 36 V single supply, ±2.3 V to ±18 V dual supply
- Input overvoltage protection: up to 40 V from opposite supply
- Gain range: 1 to 1000 set by a single resistor
- High ESD immunity and robust input protection
- Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N packages
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 AD8422?
The maximum quiescent current of the AD8422 is 368 µA.
- What is the input voltage noise at 1 kHz for the AD8422?
The input voltage noise at 1 kHz for the AD8422 is 8 nV/√Hz.
- What is the bandwidth of the AD8422 at a gain of 1?
The bandwidth of the AD8422 at a gain of 1 is 2.2 MHz.
- What is the common-mode rejection ratio (CMRR) at 10 kHz for the AD8422 at a gain of 1?
The CMRR at 10 kHz for the AD8422 at a gain of 1 is 80 dB.
- What is the gain range of the AD8422?
The gain range of the AD8422 is from 1 to 1000, set by a single resistor.
- 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 AD8422 in MSOP and SOIC_N packages is from -40°C to +85°C.
- What is the operating temperature range for the AD8422 in LFCSP packages?
The operating temperature range for the AD8422 in LFCSP packages is from -40°C to +125°C.
- What kind of input protection does the AD8422 have?
The AD8422 has input overvoltage protection up to 40 V from the opposite supply rail and robust input protection without sacrificing noise performance.
- In which applications is the AD8422 commonly used?
The AD8422 is commonly used in medical instrumentation, industrial process controls, strain gages, transducer interfaces, precision data acquisition systems, channel-isolated systems, and portable instrumentation.
