ADE1139

RECOMMENDED FOR NEW DESIGNS

Precision Ultralow Noise, Set Gain, Zero-Drift Differential Amplifier

Zero Drift Amplifier With Ultra-Low Noise For Use With Rogowski Sensors

Data Sheet (Rev. SpA) Product Selection Table

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Overview

Low offset: 2.5 μV maximum
Low offset voltage drift: 0.015 μV/°C maximum
Low noise
- 5.6 nV/√Hz at f = 1 kHz, AV = +100
- 97 nV p-p at f = 0.1 Hz to 10 Hz, A_V = +100
Open-loop voltage gain: 130 dB minimum
CMRR: 80 dB minimum
PSRR: 80 dB minimum

Gain bandwidth product: 4 MHz
Single-supply operation: 2.2 V to 5.5 V
Dual-supply operation: ±1.1 V to ±2.75 V
Rail-to-rail input and output
Unity-gain stable

he ADE1139 is a zero-drift fully-differential programmable-gain amplifier, targeted to interface with a di/dt current sensor. It features a rail-to-rail input and differential output swing. With an output common-mode offset voltage of 8 mV, output common-mode offset voltage drift of 15 μV/°C for all gain conditions, and typical differential noise density of 7 nV/√Hz, the ADE1139 is well suited for applications in which error sources cannot be tolerated.

The ADE1139 has a wide operating supply range of 3.0 V to 5.5 V, high gain, and excellent common-mode rejection ratio (CMRR) and power-supply rejection ratio (PSRR) specifications, which makes it ideal for applications that require precision amplification of low-level signals. The ADE1139 is specified over the extended industrial temperature (−40°C to +125°C), and is available in a 12-lead LFCSP package.

APPLICATIONS