Overview
The AD842KNZ, produced by Analog Devices Inc., is a high-performance instrumentation amplifier designed for precision and low-power applications. It is part of the AD842 series, known for its high precision, low noise, and low power consumption. The AD842KNZ is particularly suited for applications requiring high accuracy and minimal distortion.
This amplifier 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 | 368 | 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 | dB | ||
| Bandwidth (G = 1) | 2.2 | MHz | ||
| Input Offset Drift | 0.3 | μV/°C | ||
| Input Bias Current | 0.5 | nA | ||
| Supply Range (Single) | 4.6 | 36 | V | |
| Supply Range (Dual) | ±2.3 | ±18 | V | |
| Gain Range | 1 | 1000 |
Key Features
- Low Power Consumption: Maximum quiescent current of 368 μA, making it suitable for battery-powered devices.
- Low Noise and Distortion: Ultralow distortion performance and low voltage noise of 8 nV/√Hz at 1 kHz.
- High Precision DC Performance: Excellent DC specifications including low nonlinearity and high CMRR.
- Rail-to-Rail Output: Ensures full output range utilization.
- Wide Supply Range: Operates from 4.6 V to 36 V single supply or ±2.3 V to ±18 V dual supply.
- Input Overvoltage Protection: Protected up to 40 V from the opposite supply.
- Low Input Bias Current: Very low bias current, making it error-free with high source impedance.
- Multiple Package Options: Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC packages.
Applications
- Medical Instrumentation: Ideal for precision medical devices due to its high accuracy and low noise.
- Precision Data Acquisition: Suitable for high-precision data acquisition systems.
- Microphone Preamplification: Used in audio applications requiring low noise and high fidelity.
- Vibration Analysis: Employed in vibration analysis and other sensor-based applications.
- Multiplexed Input Applications: Can handle multiple sensors multiplexed to the inputs.
- ADC Driver: Often used as a driver for analog-to-digital converters (ADCs).
Q & A
- What is the maximum quiescent current of the AD842KNZ?
The maximum quiescent current of the AD842KNZ is 368 μA.
- What is the input voltage noise of the AD842KNZ at 1 kHz?
The input voltage noise of the AD842KNZ at 1 kHz is 8 nV/√Hz.
- What is the CMRR of the AD842KNZ at 10 kHz with a gain of 1?
The CMRR of the AD842KNZ at 10 kHz with a gain of 1 is a minimum of 80 dB.
- What is the bandwidth of the AD842KNZ with a gain of 1?
The bandwidth of the AD842KNZ with a gain of 1 is 2.2 MHz.
- What is the input offset drift of the AD842KNZ?
The input offset drift of the AD842KNZ is 0.3 μV/°C.
- What is the input bias current of the AD842KNZ?
The input bias current of the AD842KNZ is a maximum of 0.5 nA.
- What is the supply range for the AD842KNZ?
The AD842KNZ operates from 4.6 V to 36 V single supply or ±2.3 V to ±18 V dual supply.
- What is the gain range of the AD842KNZ?
The gain range of the AD842KNZ is from 1 to 1000.
- What package options are available for the AD842KNZ?
The AD842KNZ is available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC packages.
- What are some common applications of the AD842KNZ?
The AD842KNZ is commonly used in medical instrumentation, precision data acquisition, microphone preamplification, vibration analysis, multiplexed input applications, and as an ADC driver.
