INA138

® INA138 INA168 For most current data sheet and other product information, visit www.burr-brown.com High-Side Measurement CURRENT SHUNT MONITOR FEATURES q COMPLETE UNIPOLAR HIGH-SIDE CURRENT MEASUREMENT CIRCUIT q WIDE SUPPLY AND COMMON-MODE RANGE q INA138: 2.7V to 36V q INA168: 2.7V to 60V q INDEPENDENT SUPPLY AND INPUT COMMON-MODE VOLTAGES q SINGLE RESISTOR GAIN SET q LOW QUIESCENT CURRENT (25µA typ) q SOT23-5 Package DESCRIPTION The INA138 and INA168 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications. Input common-mode and power supply voltages are independent and can range from 2.7V to 36V for the INA138 and 2.7V to 60V for the INA168. Both models draw only 25µA quiescent current, which also permits connecting the power supply to either side of the current measurement shunt with minimal error. The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting. Both the INA138 and INA168 are available in SOT23-5 and are specified for the –40°C to +85°C industrial temperature range. APPLICATIONS q CURRENT SHUNT MEASUREMENT Automotive, Telephone, Computers q PORTABLE & BATTERY BACKUP SYSTEMS q BATTERY CHARGERS ...