INA170

INA170 SBOS193B – MARCH 2001 – REVISED JUNE 2004 High-Side, Bidirectional CURRENT SHUNT MONITOR FEATURES q COMPLETE BIDIRECTIONAL CURRENT MEASUREMENT CIRCUIT q WIDE SUPPLY RANGE: 2.7V to 40V q SUPPLY-INDEPENDENT COMMON-MODE VOLTAGE: 2.7V TO 60V q RESISTOR PROGRAMMABLE GAIN SET q LOW QUIESCENT CURRENT: 75µA (typ) q MSOP-8 PACKAGE DESCRIPTION The INA170 is a high-side, bidirectional current shunt monitor featuring a wide input common-mode voltage range, low quiescent current, and a tiny MSOP-8 package. Bidirectional current measurement is accomplished by output offsetting. The offset voltage level is set with an external resistor and voltage reference. This permits measurement of a bidirectional shunt current while using a single supply for the INA170. Input common-mode and power-supply voltages are independent. Input voltage can range from +2.7V to +60V on any supply voltage from +2.7V to +40V. Low 10µA input bias current adds minimal error to the shunt current. The INA170 converts a differential input voltage to a current output. This current develops a voltage across an external load resistor, setting any gain from 1 to over 100. The INA170 is available in an MSOP-8 package, and is specified over the extended industrial temperature range, –40°C to +85°C with operation from –55°C to +125°C. APPLICATIONS q CURRENT SHUNT MEASUREMENT: Automotive, Telephone, Computers, Power Systems, Test, General Instrumentation q PORTABLE AND BATTERY-BACKUP SYSTEMS q BATTERY CHARGERS q POWE...