AD8207

The AD8207 is available in an 8-lead SOIC package. Excellent dc performance over temperature keeps errors in the measurement loop to a minimum. Offset drift is typically less than 500 nV/°C, and gain drift is typically below 10 ppm/°C. The AD8207 is ideal for bidirectional current sensing applications. It features two reference pins,VREF1 and VREF2, that allow the user to easily offset the output of the device to any voltage within the supply range. With VREF1 attached to the V+ pin and VREF2 attached to the GND pin, the output is set at half scale. Attaching both pins to GND causes the output to be unipolar, starting near ground. Attaching both pins to V+ causes the output to be unipolar starting near V+. Other output offsets are achieved by applying an external low impedance voltage to the VREF1 and VREF2 pins. The AD8207 is a single-supply difference amplifier ideal for amplifying small differential voltages in the presence of large common-mode voltage. The operating input common-mode voltage range extends from -4 V to +65 V with a 5 V supply. The AD8207 works with a single-supply voltage of 3.3 V to 5 V, and is ideally suited to withstand large input PWM commonmode voltages, typical in solenoid and motor control applications.

The features of AD8207 can be summarized as (1)ideal for current shunt applications; (2)EMI filters included; (3)1 V/°C maximum input offset drift; (4)high common-mode voltage range -4 V to +65 V operating (5 V supply)/ -4 V to +35 V operating (3.3 V supply)/ -25 V to +75 V survival; (5)gain = 20 V/V; (6)3.3 V to 5.5 V supply range; (7)wide operating temperature range: -40°C to +125°C; (8)bidirectional current monitoring <500 nV/°C typical offset drift/ <10 ppm/°C typical gain drift/ >90 dB CMRR dc to 10 kHz; (9)qualified for automotive applications.

The absolute maximum ratings of AD8207 are (1)supply voltage: 12.5 V; (2)continuous input voltage: -25 V to +75 V; (3)input transient survival: -30 V to +80 V; (4)differential input voltage: -25 V to +75 V; (5)reverse supply voltage: 0.3 V; (6)operating temperature range: -40°C to +125°C; (7)storage temperature range: -65°C to +150°C; (8)output short-circuit duration: indefinite.