Overview
The AD8422ARMZ is a high-performance, low-power, rail-to-rail precision instrumentation amplifier produced by Analog Devices Inc. This amplifier is designed to deliver exceptional performance per unit microampere, making it ideal for applications requiring high precision and low power consumption. It is the third generation development of the industry-standard AD620, leveraging new process technologies and design techniques to achieve higher dynamic range and lower errors while consuming less than one-third of the power of its predecessors.
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 (G = 1, RL = 2 kΩ) | 0.5 | 5 | ppm | |
| CMRR at 10 kHz (G = 1) | 80 | dB | ||
| Bandwidth (G = 1) | 2.2 | MHz | ||
| Input Offset Drift | 0.3 | µV/°C | ||
| Input Bias Current | 0.5 | nA | ||
| Supply Voltage Range | 4.6 | 36 | V (Single Supply) | |
| Supply Voltage Range | ±2.3 | ±18 | V (Dual Supply) | |
| Gain Range | 1 | 1000 | V/V | |
| Operating Temperature Range | -40 | 85 | °C |
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: 0.04% maximum gain error (G = 1000) and 0.5 ppm nonlinearity with 2 kΩ load (G = 1).
- Wide supply range: 4.6 V to 36 V single supply and ±2.3 V to ±18 V dual supply.
- Input overvoltage protection: 40 V from opposite supply.
- Robust input protection without sacrificing noise performance.
- Error-free operation with high source impedance.
Applications
- Medical instrumentation.
- Industrial process controls.
- Strain gauges.
- Transducer interfaces.
- Precision data acquisition systems.
- Channel-isolated systems.
- Portable instrumentation.
Q & A
- What is the maximum quiescent current of the AD8422ARMZ?
The maximum quiescent current is 368 µA.
- What is the input voltage noise at 1 kHz for the AD8422ARMZ?
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 AD8422ARMZ for a gain of 1?
The bandwidth for a gain of 1 is 2.2 MHz.
- What is the input offset drift of the AD8422ARMZ?
The input offset drift is 0.3 µV/°C.
- What is the input bias current of the AD8422ARMZ?
The input bias current is 0.5 nA.
- What is the supply voltage range for the AD8422ARMZ?
The supply voltage range is 4.6 V to 36 V for single supply and ±2.3 V to ±18 V for dual supply.
- What is the gain range of the AD8422ARMZ?
The gain range is from 1 to 1000.
- What are some common applications of the AD8422ARMZ?
Common applications include medical instrumentation, industrial process controls, strain gauges, transducer interfaces, precision data acquisition systems, channel-isolated systems, and portable instrumentation.
- What is the operating temperature range of the AD8422ARMZ?
The operating temperature range is from -40°C to 85°C.
