ISOEC 202 AD202 Compatible Analog Signal Isolation Amplifier

SunYuan ISOEC 202 is a high-speed-input isolation amplifier designed to isolate and amplify wideband analog voltage signals. It adopts a high-/low-voltage isolation capacitive differential transmission scheme, using capacitive electric-field coupling instead of electromagnetic-field coupling. This design eliminates magnetic saturation, hysteresis distortion, and electromagnetic radiation interference, making it ideal for wideband signal isolation and amplification over a broad frequency range from DC to 5 kHz. While delivering wideband dynamic performance, it also preserves critical DC performance specifications.Designed with flexibility and ease of use in mind, this device is suitable for a wide range of applications requiring high-speed analog signal measurement under high common-mode voltage (CMV) conditions.

The ISOEC 202 series supports an input and output voltage range of ±5 V and a gain setting range of 1–100 V/V. It features a flexible input stage and a buffered output stage. An independent operational amplifier is integrated at the input to provide input buffering, amplification, and signal conditioning. The buffered output stage is capable of driving low-impedance loads.The device provides complete electrical isolation between the input and output, along with an isolated power supply for the input side. It is a fully integrated solution powered by a single +15 V DC supply from the output side. The built-in integrated isolated DC-DC converter eliminates the need for an additional external isolated DC-DC converter, helping designers reduce peripheral circuitry, simplify overall system design, and lower component costs. The isolated input side also provides regulated ±8 V DC power (up to ±10 mA) to power external amplifiers and signal-conditioning devices on the isolated side. This power can also be used directly to excite sensors or transmitters in the field.

The ISOEC 202 series is available in four package options to meet different installation requirements: 1.ISOEC 202Y: Uses a PCB adapter with a pin-to-pin compatible pinout matching the widely used AD202KY package. 2.ISOEC 202N: Uses a PCB adapter with a pin-to-pin compatible pinout matching the widely used AD202KN package. 3.ISOEC 202S: Features a low-cost, compact, standard SIP-12-pin flame-retardant package. 4.DIN ISOEC 202: Features a DIN-rail-mounted design with terminal wiring for convenient installation. All four versions offer identical performance, providing 2500 Vrms high-voltage electrical isolation between input and output. They combine high accuracy, wide bandwidth, strong magnetic interference immunity, and a compact form factor, making them ideal for interfacing with analog signals from specialized sensors and transmitters.The series effectively addresses common limitations of magnetically coupled isolation circuits in complex industrial electromagnetic environments, including susceptibility to magnetic field interference, low-frequency signal distortion, and bulky designs. It is widely applicable to high-precision, wideband analog signal isolation and acquisition in power monitoring, industrial automation, rail transit, and precision instrumentation.