V (20V/DIV) +IN LT1999-10/LT1999-20/ LT1999-50 High Voltage, Bidirectional Current Sense Amplifier FEATURES DESCRIPTION n Buffered Output with 3 Gain Options: The LT 1999 is a high speed precision current sense 10V/V, 20V/V, 50V/V amplifier, designed to monitor bidirectional currents over n Gain Accuracy: 0.5% Max a wide common mode range. The LT1999 is offered in n three gain options: 10V/V, 20V/V, and 50V/V. Input Common Mode Voltage Range: 5V to 80V n AC CMRR > 80dB at 100kHz The LT1999 senses current via an external resistive shunt n Input Offset Voltage: 1.5mV Max and generates an output voltage, indicating both mag- n 3dB Bandwidth: 2MHz nitude and direction of the sensed current. The output n Smooth, Continuous Operation Over Entire Common voltage is referenced halfway between the supply voltage Mode Range and ground, or an external voltage can be used to set n 4kV HBM Tolerant and 1kV CDM Tolerant the reference level. With a 2MHz bandwidth and a com- n Low Power Shutdown <10A mon mode input range of 5V to 80V, the LT1999 is suit- n 55C to 150C Operating Temperature Range able for monitoring currents in H-Bridge motor controls, n 8-Lead MSOP and 8-Lead SO (Narrow) Packages switching power supplies, solenoid currents, and battery n 8-Lead MSOP Pinout Option Engineered for FMEA charge currents from full charge to depletion. n AEC-Q100 Qualified for Automotive Applications The LT1999 operates from an independent 5V supply and draws 1.55mA. A shutdown mode is provided for mini- APPLICATIONS mizing power consumption. n High Side or Low Side Current Sensing The LT1999 is available in an 8-lead SOP, an 8-lead MSOP n H-Bridge Motor Control (original pinout), or an 8-lead pinout option engineered n Solenoid Current Sense for FMEA. n High Voltage Data Acquisition All registered trademarks and trademarks are the property of their respective owners. n PWM Control Loops n Fuse/MOSFET Monitoring TYPICAL APPLICATION Full Bridge Armature Current Monitor + V LT1999 V S 5V + 2A V V OUT 1 8 SHDN V SHDN 2.5V R + G 4k V +IN 2 7 R S + V OUT V + 0.8k V IN + V +IN V 0.8k 160k 4k 3 V 6 REF + 5V 160k V 0.1F 1999 TA01b 4 TIME (10s/DIV) 5 0.1F 1999 TA01a Rev. E 1 Document Feedback For more information www.analog.com V (2V/DIV) OUTLT1999-10/LT1999-20/ LT1999-50 ABSOLUTE MAXIMUM RATINGS (Note 1) Differential Input Voltage Specified Temperature Range (Note 6) +IN to IN (Notes 1, 3) ................................. 60V, 10ms LT1999C .................................................. 0C to 70C +IN to GND, IN to GND (Note 2) ............. 5.25V to 88V LT1999I ................................................40C to 85C + Total Supply Voltage (V to GND) ................................6V LT1999H ............................................ 40C to 125C + Input Voltage Pins 6 and 8 ...................V + 0.3V, 0.3V LT1999MP ......................................... 55C to 150C Output Short-Circuit Duration (Note 4) ............ Indefinite Junction Temperature ........................................... 150C Operating Ambient Temperature (Note 5) Storage Temperature Range .................. 65C to 150C LT1999C ..............................................40C to 85C LT1999I ................................................40C to 85C LT1999H ............................................ 40C to 125C LT1999MP ......................................... 55C to 150C PIN CONFIGURATION ORIGINAL MSOP PINOUT MSOP PINOUT ENGINEERED FOR FMEA TOP VIEW + V 1 8 SHDN TOP VIEW TOP VIEW + V 1 8 SHDN +IN 1 8 SHDN +IN 2 7 OUT +IN 2 7 OUT IN 2 7 OUT IN REF 3 6 IN 3 6 REF NC 3 6 REF + + + V 4 5 GND V 4 5 GND V 4 5 GND MS8 PACKAGE MS8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC MSOP 8-LEAD PLASTIC MSOP 8-LEAD PLASTIC SO T = 150C, = 300C/W T = 150C, = 300C/W JMAX JA JMAX JA T = 150C, = 190C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1999CMS8-10 PBF LT1999CMS8-10 TRPBF LTFPB 8-Lead Plastic MSOP 0C to 70C LT1999IMS8-10 PBF LT1999IMS8-10 TRPBF LTFPB 8-Lead Plastic MSOP 40C to 85C LT1999HMS8-10 PBF LT1999HMS8-10 TRPBF LTFPB 8-Lead Plastic MSOP 40C to 125C LT1999MPMS8-10 PBF LT1999MPMS8-10 TRPBF LTFQP 8-Lead Plastic MSOP 55C to 150C LT1999CMS8-10F PBF LT1999CMS8-10F TRPBF LTGVB 8-Lead MSOP FMEA Pinout 0C to 70C LT1999IMS8-10F PBF LT1999IMS8-10F TRPBF LTGVB 8-Lead MSOP FMEA Pinout 40C to 85C LT1999HMS8-10F PBF LT1999HMS8-10F TRPBF LTGVB 8-Lead MSOP FMEA Pinout 40C to 125C LT1999MPMS8-10F PBF LT1999MPMS8-10F TRPBF LTGVB 8-Lead MSOP FMEA Pinout 55C to 150C LT1999CS8-10 PBF LT1999CS8-10 TRPBF 199910 8-Lead Plastic SO 0C to 70C LT1999IS8-10 PBF LT1999IS8-10 TRPBF 199910 8-Lead Plastic SO 40C to 85C LT1999HS8-10 PBF LT1999HS8-10 TRPBF 199910 8-Lead Plastic SO 40C to 125C LT1999MPS8-10 PBF LT1999MPS8-10 TRPBF 99MP10 8-Lead Plastic SO 55C to 150C LT1999CMS8-20 PBF LT1999CMS8-20 TRPBF LTFNZ 8-Lead Plastic MSOP 0C to 70C LT1999IMS8-20 PBF LT1999IMS8-20 TRPBF LTFNZ 8-Lead Plastic MSOP 40C to 85C LT1999HMS8-20 PBF LT1999HMS8-20 TRPBF LTFNZ 8-Lead Plastic MSOP 40C to 125C Rev. E 2 For more information www.analog.com