AD8411AWBRZ

The AD8411A1 is a high-voltage, high-bandwidth current-sense amplifier. The device features an initial gain of 50 V/V, with a 2.7 MHz bandwidth with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8411A has a minimum DC common-mode rejection ratio (CMRR) of 123 dB from -2 V to +70 V. The AD8411A performs bidirectional current measurements across a shunt resistor in various industrial and automotive applications. The AD8411A offers breakthrough performance throughout the -40°C to +125°C temperature range. The device features an in-package trim core, which leads to a typical offset drift of ±0.26 μV/°C (based on Box Method) throughout the operating temperature range and the common-mode voltage range without the need for chopping and auto-zero clocks (which could lead to intermodulation in the application). The device includes circuitry to achieve a wide input common-mode range and balanced input bias currents, regardless of input differential voltage or common-mode voltage, and circuitry to achieve ultra-low CMRR drift. The device also includes circuitry to enable output accuracy in the presence of pulse-width modulation (PWM) type input common-mode voltages. The AD8411A is available in 8-lead, SOIC_N package and 8-lead, MSOP package.

Applications

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

Key features

• 2.7 MHz small signal, -3 dB bandwidth
• In-package Trim Core (DigiTrim)
• Precision without chopping and/or auto-zero
• Typical ±0.26 μV/°C offset drift
• Maximum ±200 μV voltage-offset over temperature range
• Typical DC CMRR: 142 dB
• Typical AC CMRR at 50 kHz: 96 dB
• -2 V to +70 V, continuous operation
• -20 V to +85 V, continuous survival
• Initial gain: 50 V/V
• Wide operating temperature range: -40°C to +125°C
• Bidirectional operation
• 2.9 V to 5.5 V power-supply operating range
• Available in 8-lead, SOIC_N package and 8-lead, MSOP package.
• AEC-Q100 qualified for automotive applications