Current sense amplifier achieves industry’s highest accuracy says ADI

The AD8207 zero drift, high voltage, bi-directional current sense amplifier has been designed to meets the performance and quality requirements for motor and solenoid control in industrial and automotive applications. The product features temperature accuracy specified at a maximum of 1 µV/^°C offset drift over the automotive temperature range of -40 to 125^°C. According to ADI, this is a five fold improvement over competing devices. The architecture of the AD8207 amplifies small differential current shunt voltages in the presence of common-mode voltages ranging from -4 to 65V. The new current sense amplifier rejects pulse width modulation (pwm) input common mode voltages, while the zero-drift architecture is said to yield the lowest offset drift performance available today. "For customers who need automotive grade performance, the AD8207 is the only zero-drift current sense amplifier with high bandwidth and a common mode voltage range that extends below ground," said Steve Sockolov, director, Precision Signal Conditioning Group, Analog Devices. "The industry's lowest guaranteed offset drift, coupled with greater than 150KHz bandwidth, and maximum 0.3% gain error, means the AD8207 achieves best in class accuracy without requiring the larger pcb layout and multi-temperature production calibration of discrete alternatives."