Analog Devices Inc. AD8410A Current-Sense Amplifiers

Analog Devices Inc. AD8410A Current-Sense Amplifiers provide an initial gain of 20V/V, with a 2.2MHz bandwidth with a maximum ±0.13% gain error over the entire temperature range. The AD8410A high voltage, high bandwidth current-sense amplifiers offer a minimum DC Common-Mode Rejection Ratio (CMRR) of 123dB from -2V to +70V. The device's buffered output voltage directly interfaces with any typical converter. The AD8410A performs bidirectional current measurements over a shunt resistor in various industrial and automotive applications.

The ADI AD8410A current-sense amplifiers supply an in-package trim core, which leads to a typical offset drift of ±0.21µV/°C throughout the operating temperature range and the common-mode voltage range. The amps contain circuitry to perform a wide input common-mode range and balanced input bias currents, regardless of input differential or common-mode voltage, and circuitry to execute ultra-low CMRR drift. The AD8410A also incorporates circuitry to enable output accuracy in the presence of pulse-width modulation (PWM) type input common mode voltages.

The AD8410A operates throughout the -40°C to +125°C temperature range and is available in an 8-lead SOIC_N package.

Features

In-package Trim Core (DigiTrim™)
- Precision without chopping and/or autozero
- Typical ±0.21µV/°C offset drift
- Maximum ±200µV voltage offset over the temperature range
- 142dB typical DC CMRR
- 96dB typical AC CMRR at 50kHz
Wide common-mode input voltage range
- -2V to +70V, continuous operation
- -20V to +85V, continuous survival

2.2MHz small signal, -3dB bandwidth
20V/V initial gain
Wide operating temperature range of -40°C to +125°C
Bidirectional operation
2.9V to 5.5V power-supply operating range
Available in 8-lead, SOIC_N package
AEC-Q100 Automotive qualified

Applications

In-phase or High-side current sensing in
- Motor control in BLDC motors, low-inductance motors
- Bidirectional 48V to 12V DC-DC converters
- Solenoid controls
- Power rail monitoring