TP181 Zero-Drift, Bi-directional Current Sense Amplifier

　　The TP181 series of zero-drift, bi-directional current sense amplifier can sense voltage drops across shunts at commonmode voltages from –0.3V to 36V, independent of the supply voltage. Three fixed gains are available: 50V/V, 100V/V and 200V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale. TP181 devices operate from a single +2.7V to 30V power supply, with drawing a typical of 120uA of supply current. All versions are specified from –40°C +125°C, and offered in SC70- 6 packages.

　　Features

　　 VOLTAGE OFFSET: ±100uV (MAX)

　　 WIDE COMMON MODE VOLTAGE: -0.3V to +36V

　　 SUPPLY VOLTAGE: 2.7V to +30V

　　 ACCURACY and ZERO-DRIFT PERFORMANCE

　　 ±1% Gain Error (Max over temperature)

　　 0.5μV/°C Offset Drift (Max)

　　 10ppm/°C Gain Drift (Max)

　　 THREE GAIN OPTIONS for VOLTAGE OUTPUT

　　 TP181A1: 50V/V

　　 TP181A2: 100V/V

　　 TP181A3: 200V/V

　　 LOW SUPPLY CURRENT: 120uA (TYP)

　　 Rail-to-Rail Output

　　 PACKAGE: SC70-6

　　 Industrial –40°C to 125°C Operation Range

　　 ESD Rating: Robust 2KV – HBM, 2KV – CDM

　　 Higher performance Drop-In Compatible With

　　INA213, INA214, INA199, NCS199 Products

　　Applications

　　 CURRENT SENSING (High−Side/Low−Side)

　　 BATTERY CHARGERS

　　 POWER MANAGEMENT

　　 CELL PHONE CHARGER

　　 ELECTRICAL CIGIRATE

　　 WIRELESS CHARGER

　　 TELECOM EQUIPMENT