AD8418ABRMZ

The AD8418A is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418A offers excellent input common - mode rejection from -2V to +70 V. The AD8418A performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, power management, and solenoid control. The AD8418A offers breakthrough performance throughout the -40°C to +150°C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1 μV/°C throughout the operating temperature range and the common - mode voltage range. The AD8418A is qualified for automotive applications. The device includes EMI filters and patented circuitry to enable output accuracy with pulse - width modulation (PWM) type input common - mode voltages. The typical input offset voltage is ±100 μV. The AD8418A is offered in 8 - lead MSOP and SOIC packages.

Applications

• High - side current sensing in Motor controls
• Solenoid controls
• Power management
• Low - side current sensing
• Diagnostic protection

Key features

• Typical 0.1 μV/°C offset drift
• Maximum ±200 μV voltage offset over full temperature range
• 2.7 V to 5.5 V power supply operating range
• Electromagnetic interference (EMI) filters included
• High common - mode input voltage range −2 V to +70 V continuous, −4 V to +85 V survival
• Minimum DC common - mode rejection ratio (CMRR): 90 dB
• Initial gain ε = 20 V/V
• Wide operating temperature range AD8418AWB: -40°C to +125°C, AD8418AWH: -40°C to +150°C
• Bidirectional operation
• Available in 8 - lead SOIC and 8 - lead MSOP
• Qualified for automotive applications