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AD202JN

Transformer-coupled isolation amplifier, 750Vrms isolation, 2kHz bandwidth, 10-DIP, with integrated isolated power

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Manufacturer Part：

AD202JN

Package：

10-Pin DIP

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Description

Product Overview

The AD202JN from Analog Devices is a general-purpose, two-port, transformer-coupled isolation amplifier designed for applications requiring galvanic isolation between input and output stages. It provides 750Vrms continuous isolation voltage, integrated isolated power outputs, and an uncommitted input amplifier. With a bandwidth of 2kHz and gain non-linearity of ±0.05%, it is housed in a 10-pin DIP package and operates over 0°C to 70°C.

Key Specifications

Category Isolation Amplifier
Isolation Voltage 750 Vrms
Max Common-Mode Voltage 1000V
Number of Amplifiers 1
Bandwidth 2 kHz
Gain Non-Linearity ±0.05%
IMRR 105 dB at 60Hz
Supply Voltage 13.5V to 16.5V
Isolation Type Galvanic, Magnetic (Transformer)
Package 10-Pin DIP
Operating Temperature 0°C ~ 70°C
Part Status Obsolete

Features

  • Transformer-coupled isolation eliminates need for external DC-DC converter
  • Integrated isolated power outputs for input side circuitry
  • Uncommitted input amplifier for flexible gain configuration
  • 105dB isolation-mode rejection ratio at 60Hz
  • 1000V maximum common-mode voltage rating
  • ±0.05% gain non-linearity for precision measurement
  • Through-hole DIP package for easy prototyping

Applications

  • Multichannel data acquisition systems
  • Current shunt measurements
  • Motor control and drive systems
  • Process signal isolation in industrial environments
  • High-voltage instrumentation amplifiers

The AD202JN is a general-purpose, two-port, transformer-coupled isolation amplifier from Analog Devices. It provides total galvanic isolation between the input and output stages through internal transformer coupling, eliminating the need for an external DC-to-DC converter. This reduces circuit overhead and overall design cost. The device features an uncommitted input amplifier that allows flexible gain configuration, and integrated isolated power outputs that can drive external circuitry on the isolated input side. With an isolation voltage rating of 750Vrms continuous and a maximum common-mode voltage of 1000V, the AD202JN is suitable for demanding industrial and medical applications where patient safety or equipment protection is critical. The device achieves an isolation-mode rejection ratio (IMRR) of 105dB at 60Hz, ensuring excellent rejection of common-mode noise.

The AD202JN uses transformer coupling to achieve galvanic isolation between input and output stages. The input signal is amplified by the uncommitted input amplifier and then modulated onto a carrier signal. This modulated signal passes through the isolation transformer to the output stage, where it is demodulated to reconstruct the original signal. An internal oscillator drives the transformer, which also generates isolated power for the input side circuitry, eliminating the need for an external isolated power supply. The transformer barrier provides the galvanic isolation, with the IMRR determined by the transformer’s capacitive coupling between primary and secondary windings.

Pin Name Type Description
1 +VISO PWR Isolated +7.5V output (input side)
2 -VISO PWR Isolated -7.5V output (input side)
3 HI I Input amplifier non-inverting input
4 LO I Input amplifier inverting input / feedback
5 COM IN GND Input common (isolated)
6 COM OUT GND Output common (non-isolated)
7 VOUT LO O Output low (feedback)
8 VOUT HI O Output high (signal output)
9 +VCC PWR Positive supply (+15V)
10 -VCC PWR Negative supply (-15V)
  • Medical Instrumentation: ECG/EEG front-end isolation for patient safety
  • Industrial Process Control: 4-20mA loop isolation and sensor signal conditioning
  • Motor Drives: Current sensing via shunt resistor with high-voltage isolation
  • Data Acquisition: Multichannel analog input isolation in test systems
  • Power Monitoring: High-voltage measurement with galvanic isolation
Model Manufacturer Key Difference
AD202AY Analog Devices Wider temp range, SIP package
AD204JN Analog Devices Higher bandwidth, similar isolation
ISO124P Texas Instruments Capacitive isolation, 60kHz bandwidth
HCPL-7800 Broadcom Optical isolation, 100kHz bandwidth
AMC1301 Texas Instruments Reinforced isolation, capacitive, modern replacement
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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