The AD8411A 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, see Figure 53) 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, Mini Small Outline Package (MSOP).

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

Protected by U.S. patent numbers 10,312,865 and 10,587,228.