Isolated Amplifier with Fixed Gain and Single-Ended Output

The ADuM4195-1 is an isolation amplifier based on Analog Devices, Inc., iCoupler® technology. The ADuM4195-1 has very low offset and gain error, making it ideal for many isolated voltage sensing applications.

Unlike optocoupler-based solutions, which have an uncertain current transfer ratio over a lifetime and is unstable at high temperatures, the ADuM4195-1 transfer function does not change over its lifetime, and is stable over a wide temperature range of −40°C to +125°C.

The ADuM4195-1 has been certified to provide galvanic isolation up to 5 kV rms according to UL1577.

The ADuM4195-1 is packaged in a small 8-lead wide body SOIC package with increased creepage.

APPLICATIONS

* Inverters

* DC-DC converter

* On-board chargers

* Wide input/output range 0.25 V to 4.3 V (typ)

* High-impedance input for isolated voltage measurement

* Fixed gain = 1

* Low offset error and drift: ±5 mV (maximum) at 25°C and −22 μV/°C (typical)

* Low gain error and drift: ±0.5% (max) and ±42 ppm/°C (maximum)

* Voltage-supply range

* VDD1: 4.5 V to 5.5 V

* VDD2: 4.5 V to 5.5 V

* Bandwidth: 210 kHz