LT1787IS8#TRPBF Analog Devices

LT1787/LT1787HV Precision, High Side Current Sense Amplifiers FEATURES DESCRIPTIO Input Offset Voltage: 75V (Max) The LT 1787 is a complete micropower precision high 60V Supply Operation (LT1787HV) side current sense amplifier. The LT1787 monitors bidi- 12-Bit Dynamic Range rectional currents via the voltage across an external sense Operating Current: 60A resistor. A current or voltage output indicates the direction User-Selectable External Sense Resistor and magnitude of the sense current. The LT1787 delivers Bidirectional High Side Current Sensing greater than a 12-bit dynamic range with ultralow 40V Unidirectional or Bidirectional Output input offset voltage compared to a typical 250mV full- Input Noise Filtering scale input voltage. A fixed gain of 8 is set by onboard 40C to 125C Operating Temperature Range precision resistors. Input signal filtering is easily imple- + Available in 8-Lead SO and MSOP Packages mented with a capacitor between the FIL and FIL pins. The LT1787HV operates from 2.5V to 60V total supply U voltage and the LT1787 operates from 2.5V to 36V total APPLICATIO S supply voltage. Both versions have a PSRR in excess of 120dB. The LT1787/LT1787HV draw only 60A and are Battery Monitoring available in 8-lead SO and MSOP packages. Power Monitoring , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Portable Phones All other trademarks are the property of their respective owners. Cellular Phones Portable Test/Measurement Systems Battery-Operated Systems TYPICAL APPLICATIO 12-Bit Dynamic Resolution Unidirectional Output into LTC 1286 ADC Input Offset Voltage vs Supply Voltage 50 R SENSE 0.0016 I = 100A TO 40 LOAD 30 2.5V TO 60V 18 + FIL FIL 20 LT1787HV + V V 27S S R1 C1 10 5V 15k 1F V 36BIAS 0 DNC R OUT 10 V V 20k REF CC 45 CS 20 V +IN EE LTC1286 V CLK TO P OUT 30 IN D OUT GND C2 40 1787 TA01 LT1634-1.25 0.1F V = V + (8 I R ) OUT BIAS LOAD SENSE 50 0 10 20 30 40 50 60 TOTAL SUPPLY VOLTAGE (V) 1787 TA01b 1787fc 1 INPUT OFFSET VOLTAGE (V) U ULT1787/LT1787HV ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Differential Sense Voltage ...................................... 10V Specified Temperature Range (Note 4) Total Supply Voltage (LT1787) ................................ 40V LT1787C ............................................. 40C to 85C Total Supply Voltage (LT1787HV) ........................... 65V LT1787I .............................................. 40C to 85C Output Voltage ..................... (V 0.3V) to (V + 35V) LT1787H .......................................... 40C to 125C EE EE Output Bias Voltage ............. (V 0.3V) to (V + 35V) Storage Temperature Range ..................65C to 150C EE EE Operating Temperature Range (Note 3) Lead Temperature (Soldering, 10 sec).................. 300C LT1787C ............................................. 40C to 85C LT1787I .............................................. 40C to 85C LT1787H .......................................... 40C to 125C PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW + FIL 1 8 FIL + FIL 1 8 FIL + + V 2 7 V S S V 2 7 V S S DNC* 3 6 V BIAS DNC* V 3 6 BIAS V V 4 5 EE OUT V 4 5 V EE OUT MS8 PACKAGE 8-LEAD PLASTIC MSOP S8 PACKAGE 8-LEAD PLASTIC SO * DO NOT CONNECT T = 150C, = 250C/ W JMAX JA * DO NOT CONNECT T = 150C, = 190C/ W JMAX JA ORDER PART NUMBER MS8 PART MARKING ORDER PART NUMBER S8 PART MARKING LT1787CMS8 LTGM LT1787CS8 1787 LT1787IMS8 LTGN LT1787IS8 1787I LT1787HVCMS8 LTKJ LT1787HS8 1787H LT1787HVIMS8 LTKK LT1787HVCS8 1787HV LT1787HVIS8 787HVI LT1787HVHS8 787HVH Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: