Overview
The AD202KN is a general-purpose, two-port, transformer-coupled isolation amplifier produced by Analog Devices Inc. This component is designed to provide complete galvanic isolation between the input and output stages, making it suitable for applications where input signals must be measured, processed, and/or transmitted without a galvanic connection. The AD202KN is available in compact plastic SIP or DIP style packages, offering high channel density and ease of use.
Key Specifications
| Parameter | Value |
|---|---|
| Gain Range | 1 V/V to 100 V/V |
| Nonlinearity (G = 1 V/V) | ±0.025% max (K Grade) |
| Common-Mode Rejection Ratio (CMRR) | 130 dB (Gain = 100 V/V) |
| Common-Mode Voltage Isolation | ±2000 V pk continuous (K Grade) |
| Bandwidth | 5 kHz full-power (AD204), though the AD202 has a similar bandwidth profile |
| Power Consumption | 75 mW over the full signal range |
| Input Voltage Range | Bipolar ±5 V output range |
| Isolated Power Outputs | ±7.5 V, 2 mA (either output) |
| Package Types | SIP and DIP |
Key Features
- Small Size: Available in SIP and DIP packages, with the SIP package being just 0.25" wide, allowing for four channels per inch.
- High Accuracy: Maximum nonlinearity of ±0.025% for the K grade and low drift over temperature.
- Low Power Consumption: Consumes 75 mW of power over the full signal range.
- High CMR and Isolation: Offers 130 dB of CMRR and ±2000 V pk continuous common-mode isolation.
- Uncommitted Input Amplifier: Includes an uncommitted op amp on the input stage for maximum flexibility.
- Isolated Power Outputs: Provides isolated power outputs with ±7.5 V and 2 mA current capability.
Applications
- Multichannel Data Acquisition: Ideal for systems requiring multiple isolated channels.
- Current Shunt Measurements: Used in applications where current needs to be measured accurately.
- Motor Controls: Suitable for motor control systems requiring isolated signal processing.
- Process Signal Isolation: Used to isolate process signals in industrial environments.
- High Voltage Instrumentation Amplifier: Applicable in high-voltage instrumentation where signal isolation is critical.
Q & A
- What is the primary function of the AD202KN isolation amplifier? The AD202KN provides complete galvanic isolation between the input and output stages, allowing for the measurement, processing, and transmission of signals without a galvanic connection.
- What are the available package types for the AD202KN? The AD202KN is available in SIP and DIP style packages.
- What is the maximum nonlinearity of the AD202KN? The maximum nonlinearity is ±0.025% for the K grade.
- What is the common-mode rejection ratio (CMRR) of the AD202KN? The CMRR is 130 dB at a gain of 100 V/V.
- How much power does the AD202KN consume? The AD202KN consumes 75 mW of power over the full signal range.
- What is the bandwidth of the AD202KN? The AD202KN has a full-power bandwidth similar to the AD204, which is 5 kHz.
- What are the isolated power output specifications of the AD202KN? The isolated power outputs are ±7.5 V with a current capability of 2 mA.
- In what applications is the AD202KN commonly used? It is commonly used in multichannel data acquisition, current shunt measurements, motor controls, process signal isolation, and high-voltage instrumentation.
- How does the AD202KN differ from the AD204? The primary difference is in the power supply method; the AD202 is powered directly from a +15 V DC supply, while the AD204 is powered by an externally-supplied clock.
- What is the significance of the uncommitted input amplifier in the AD202KN? The uncommitted input amplifier provides maximum flexibility and ease of use in various applications.
