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Current sense amplifiers boast 1.8 MHz bandwidth
31st March 2025
Mick Elliott
In stock at authorised distributor DigiKey are the Analog Devices AD8412A series current sense amplifiers.
They feature an initial gain of 10 V/V, a 1.8 MHz bandwidth, and a maximum ±0.11% gain error over the entire temperature range.
The buffered output voltage directly interfaces with any typical converter.
These high-voltage, high-bandwidth current sense amplifiers have a minimum DC common-mode rejection ratio (CMRR) of 110 dB from -2 V to +50 V.
This series performs bidirectional current measurements across a shunt resistor in a variety of industrial and automotive applications.
The AD8412A offers breakthrough performance throughout the temperature range of -40°C to +125°C and is available in an 8-lead mini small outline package (MSOP).
It features an in-package trim core which leads to a typical offset drift of ±0.30 µV/°C throughout the operating temperature range and the common-mode input voltage range.
This design operates without the need for chopping or autozero clocks, which can lead to intermodulation in the application.
The AD8412A includes circuitry to achieve a wide input common-mode range, balanced input bias currents, and ultra-low CMRR drift, regardless of the input differential voltage. This circuitry also ensures output accuracy in the presence of pulse-width modulation (PWM) type common-mode voltages.
