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
  • Low-side current sensing

TYPICAL APPLICATION CIRCUIT

Application Circuit Diagram - Analog Devices Inc. AD8410A Current-Sense Amplifiers

Performance Graph - Analog Devices Inc. AD8410A Current-Sense Amplifiers

Functional Block Diagram

Block Diagram - Analog Devices Inc. AD8410A Current-Sense Amplifiers

Analog Devices Inc. AD8410A Current-Sense Amplifiers