LTC6104 High Voltage, High Side, Bi-Directional Current Sense Ampli er FEATURES DESCRIPTION Wide Supply Range: 4V to 60V with 70V Absolute The LTC 6104 is a versatile, high voltage, high side, bi- Maximum directional current sense ampli er. Design exibility is Low Offset Voltage: 450V Maximum provided by the excellent device characteristics: 450V Fast Response: 1s Response Time maximum offset and only 520A of current consumption Gain Con gurable with External Resistors Each (typical at 12V). The LTC6104 operates on supplies from Direction is Gain Con gurable 4V to 60V. Low Input Bias Current: 170nA Maximum The LTC6104 monitors bi-directional current via the voltage PSRR: 110dB Minimum across an external sense resistor (shunt resistor). This Output Current: 1mA Maximum sense voltage is then translated into a ground referenced Low Supply Current: 520A, V = 12V S signal. Gain is set with three external resistors and can Speci ed for 40C to 125C Temperature Range be separately con gured for both directions. Low DC Available in an 8-Lead MSOP Package offset allows the use of a small shunt resistor and large gain-setting resistors. As a result, power loss in the shunt APPLICATIONS is minimal. Current Shunt Measurement The wide operating supply range and high accuracy make Battery Monitoring the LTC6104 ideal for a wide variety of automotive, industrial Remote Sensing and power management applications. A maximum input Power Management sense voltage of 500mV allows a wide range of currents , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. to be monitored. The fast response makes the LTC6104 All other trademarks are the property of their respective owners. the perfect choice for load current warnings and shutoff protection control. With very low supply current, the LTC6104 is suitable for power sensitive applications. The LTC6104 is available in an 8-lead MSOP package. TYPICAL APPLICATION 16-Bit Resolution Bi-Directional Output into LTC1286 ADC I LOAD V SENSE + TO Step Response CHARGER/LOAD + R SENSE 12V R R IN IN 100 100 V = 100mV SENSE V SENSE 8 7 6 5 6V +INA INA INB +INB + A B + R1 V V C1 S S 5V 2.3k 1F V T = 25C REF A V OUT V = 12V S I = 100A R = 100 IN OUT V V REF CC 1.5V CURRENT R = 5k OUT CS +IN + 1V MIRROR V = V OUT V SENSE S LTC6104 I = 0A V = 1V LTC1286 CLK TO P OUT REF 1 4 IN D OUT TIME (1s/DIV) C2 R OUT GND LT 1004-2.5 0.1F 6104 G15 2.5k 6104 TA01a 6104f 1 +LTC6104 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) Total Supply Voltage (+INB(V ) to V ) ......................70V TOP VIEW S OUT 1 8 +INA Maximum Applied Output Voltage (OUT) ....................9V NC 2 7 INA Input Current ........................................................10mA NC 3 6 INB 5 +INB/V V 4 S Output Short-Circuit Duration (to V ) ............... Inde nite MS8 PACKAGE Operating Temperature Range 8-LEAD PLASTIC MSOP LTC6104C ............................................ 40C to 85C T = 150C, = 300C/W JMAX JA LTC6104I ............................................. 40C to 85C ORDER PART NUMBER MS8 PART MARKING* LTC6104H .......................................... 40C to 125C LTC6104CMS8 LTCMP Speci ed Temperature Range (Note 2) LTC6104IMS8 LTCMP LTC6104C ................................................ 0C to 70C LTC6104HMS8 LTCMP LTC6104I ............................................. 40C to 85C LTC6104H .......................................... 40C to 125C Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Storage Temperature Range ................... 65C to 150C Lead Free Part Marking: