Overview
The AD8422BRZ, manufactured by Analog Devices Inc., is a high precision, low power, low noise, rail-to-rail instrumentation amplifier. It is designed to deliver the best performance per unit microampere in the industry. 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 than its predecessors, while consuming less than one-third of the power. It is ideal for applications requiring high precision, low noise, and low power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current | 368 μA (max) | μA |
| Input Voltage Noise at 1 kHz | 8 nV/√Hz (max) | nV/√Hz |
| RTI Noise (G = 100) | 0.15 μV p-p | μV p-p |
| Nonlinearity with 2 kΩ Load (G = 1) | 0.5 ppm | ppm |
| CMRR at 10 kHz (G = 1) | 80 dB (min) | dB |
| Bandwidth (G = 1) | 2.2 MHz | MHz |
| Input Offset Drift | 0.3 μV/°C (max) | μV/°C |
| Input Bias Current | 0.5 nA (max) | nA |
| Supply Range (Single Supply) | 4.6 V to 36 V | V |
| Supply Range (Dual Supply) | ±2.3 V to ±18 V | V |
| Input Overvoltage Protection | 40 V from opposite supply | V |
| Gain Range | 1 to 1000 | V/V |
| Operating Temperature Range | −40°C to +85°C (MSOP, SOIC_N), −40°C to +125°C (LFCSP) | °C |
Key Features
- High precision, low power, and low noise performance.
- Rail-to-rail output swing and wide input range.
- Low bias current, making it suitable for high source impedance applications.
- Input overvoltage protection up to 40 V from the opposite supply rail.
- High CMRR (Common Mode Rejection Ratio) of up to 150 dB.
- Low gain error and nonlinearity.
- Wide supply range: 4.6 V to 36 V single supply, ±2.3 V to ±18 V dual supply.
- Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N packages.
- Robust input protection with high ESD immunity.
Applications
- Medical instrumentation.
- Industrial process controls.
- Strain gages and transducer interfaces.
- Precision data acquisition systems.
- Channel-isolated systems.
- Portable instrumentation.
Q & A
- What is the maximum quiescent current of the AD8422BRZ?
The maximum quiescent current of the AD8422BRZ is 368 μA.
- What is the input voltage noise at 1 kHz for the AD8422BRZ?
The input voltage noise at 1 kHz for the AD8422BRZ is 8 nV/√Hz (max).
- What is the CMRR of the AD8422BRZ at 10 kHz with a gain of 1?
The CMRR of the AD8422BRZ at 10 kHz with a gain of 1 is 80 dB (min).
- What is the bandwidth of the AD8422BRZ with a gain of 1?
The bandwidth of the AD8422BRZ with a gain of 1 is 2.2 MHz.
- What is the input offset drift of the AD8422BRZ?
The input offset drift of the AD8422BRZ is 0.3 μV/°C (max).
- What is the input bias current of the AD8422BRZ?
The input bias current of the AD8422BRZ is 0.5 nA (max).
- What is the supply range for the AD8422BRZ?
The supply range for the AD8422BRZ 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 AD8422BRZ?
The gain range of the AD8422BRZ is from 1 to 1000.
- What are the typical applications of the AD8422BRZ?
The AD8422BRZ is typically used in medical instrumentation, industrial process controls, strain gages, transducer interfaces, precision data acquisition systems, channel-isolated systems, and portable instrumentation.
- What are the available packages for the AD8422BRZ?
The AD8422BRZ is available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC_N packages.
