Analog Devices Inc. AD202JY

Overview

AD202JY from Analog Devices is a transformer-coupled isolation amplifier in SIP package, providing galvanic signal and power isolation with ±5 V output, 1 V/V–100 V/V adjustable gain, ±0.05% max nonlinearity (J grade), and ±1000 V_pk continuous common-mode isolation. It operates from a single 15 V dc supply and supports current shunt measurement and motor control applications requiring high CMR and compact channel density.

For engineers reviewing the AD202JY datasheet, AD202JY pinout, AD202JY application, or AD202JY equivalent, this page delivers verified specifications, validated SIP pin mapping, real-world use cases in process signal isolation and high-voltage instrumentation, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The AD202JY implements transformer-based amplitude modulation for dc-coupled signal transmission across the isolation barrier. Its uncommitted input op amp enables flexible front-end configurations-buffering, gain setting, filtering, or transimpedance conversion-while internal oscillator and power transformer deliver isolated ±7.5 V at 400 mA total (0.4 mA per rail) without external DC-DC converters.

It features a semi-floating output stage with 7 kΩ output resistance, no internal buffering, and direct output lead interchangeability for signal inversion. Common-mode rejection reaches 130 dB at G = 100 V/V and 105 dB at unity gain, with <5 pF total input capacitance ensuring low leakage (≤2 mA rms @ 240 V_rms, 60 Hz).

Key Specifications

Pinout & Package

SIP package (Y option): 2.08" × 0.250" × 0.625", 0.25" width enabling 4 channels/inch density; input-to-output creepage optimized for 1000 V_pk isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolation amplifier applications.

Compared with AD202KY, AD202JY trades 1000 V_pk lower isolation and 0.025% higher nonlinearity for reduced cost and identical footprint; versus ISO124, it delivers integrated isolated power and transformer-based dc accuracy but occupies larger SIP real estate.

Availability

AD202JY is available at Aetrix Electronics and suitable for current shunt measurement, motor control feedback, and process signal isolation requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEMs.

Supply support for AD202JY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial control.

The AD202 product line delivers transformer-isolated amplifiers optimized for multichannel data acquisition, high-CMR process monitoring, and safety-critical motor drive feedback where dc accuracy and integrated isolated power are essential.

FAQ

What is the maximum continuous common-mode voltage rating for AD202JY?

The AD202JY is rated for ±1000 V_pk continuous common-mode voltage (AC and DC) between input and output. This corresponds to 750 V_rms at 60 Hz and satisfies reinforced insulation requirements for many industrial 600 V AC systems. The AD202JY achieves this with internal transformer coupling and <5 pF input capacitance, limiting leakage current to ≤2 mA rms at 240 V_rms.

Does AD202JY require an external clock driver like the AD204?

No, AD202JY does not require an external clock driver. It operates from a single 15 V dc supply (Pin 31) and contains an internal oscillator that generates the 25 kHz square wave needed for transformer coupling. In contrast, the AD204 requires an external 15 V_p-p, 25 kHz clock signal (e.g., from AD246). This makes AD202JY ideal for single-channel or low-channel-count applications where simplicity and self-contained operation are priorities.

Can AD202JY provide isolated power to external circuits?

Yes, AD202JY provides isolated ±7.5 V outputs (Pins 5 and 6) referenced to INPUT/VISO COMMON (Pin 2). It delivers up to 400 mA total (0.4 mA per rail) and is sufficient to power low-current circuits such as trim networks, micropower op amps (e.g., OP97), or voltage references (e.g., AD589). Unlike the AD204, which supplies 2 mA per rail, AD202JY's isolated power is intended for auxiliary biasing-not active signal conditioning-so external loads must remain below 0.4 mA per rail.

What is the function of the uncommitted op amp in AD202JY?

The uncommitted op amp in AD202JY (with inputs at Pins 1 and 3, feedback at Pin 4) enables user-configurable front-end signal conditioning. It supports noninverting or inverting gain stages, transimpedance conversion for current inputs, summing of multiple signals, and active filtering-all without external op amps. For example, connecting a 20 kΩ resistor from Pin 4 to Pin 3 sets G = 2, while adding a 100 pF capacitor from Pin 4 to Pin 2 stabilizes gains >5. This flexibility reduces component count in sensor interface designs.

How does AD202JY handle output loading, and what is its output resistance?

AD202JY has a nominal output resistance of 7 kΩ (unbuffered), and its gain and nonlinearity degrade significantly under load-e.g., 0.2% gain change and 0.05% nonlinearity increase at 10 kΩ load (per Figure 2). Therefore, AD202JY must drive high-impedance loads (>100 kΩ) or be followed by a unity-gain buffer (e.g., AD822). Loading below 100 kΩ introduces measurable errors; the output stage is intentionally unbuffered to preserve dc accuracy and allow polarity reversal by swapping OUTPUT HI (Pin 38) and OUTPUT LO (Pin 37).