LT6375 270V Common Mode Voltage Difference Amplifier FEATURES DESCRIPTION n 270V Common Mode Voltage Range The LT 6375 is a unity-gain difference amplifier which n 90dB Minimum CMRR combines excellent DC precision, a very high input common n 0.006% (60ppm) Maximum Gain Error mode range and a wide supply voltage range. It includes a n 1ppm/C Maximum Gain Error Drift precision op amp and a highly-matched thin film resistor n 2ppm Maximum Gain Nonlinearity network. It features excellent CMRR, extremely low gain n Wide Supply Voltage Range: 3.3V to 50V error and extremely low gain drift. n Rail-to-Rail Output Comparing the LT6375 to existing difference amplifiers n 350A Supply Current with high common mode voltage range, the selectable n Selectable Internal Resistor Divider Ratio resistor divider ratios of the LT6375 offer superior system n 450V Maximum Offset Voltage performance by allowing the user to achieve maximum n 575kHz 3dB Bandwidth (Resistor Divider = 7) SNR, precision and speed for a specific input common n 375kHz 3dB Bandwidth (Resistor Divider = 20) mode voltage range. n 40C to 125C Specified Temperature Range n The op amp at the core of the LT6375 has Over-The-Top Low Power Shutdown: 20A (DFN Package Only) n protected inputs which allow for robust operation in envi- Space-Saving MSOP and DFN Packages ronments with unpredictable voltage conditions. See the Applications Information section for more details. APPLICATIONS n High Side or Low Side Current Sensing The LT6375 is specified over the 40C to 125C tem- n Bidirectional Wide Common Mode Range Current Sensing perature range and is available in space-saving MSOP16 n High Voltage to Low Voltage Level Translation and DFN14 packages n Precision Difference Amplifier L, LT, LTC, LTM, Linear Technology, Over-The-Top and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their n Industrial Data-Acquisition Front-Ends respective owners. n Replacement for Isolation Circuits TYPICAL APPLICATION Precision Wide Voltage Range, Bidirectional Current Monitor Typical Distribution of CMRR 15V 200 1248 UNITS V = 15V + S REFA REFB REFC V 180 FROM 4 RUNS V = 270V IN DIV = 25 19k 38k 23.75k 160 190k 140 + V = 270V TO 270V SOURCE 120 190k IN 100 OUT R SENSE R C V = 10mV/mA OUT 80 10 10 190k +IN + 60 40 REF LOAD 20 190k 19k 38k 23.75k 0 40 30 20 10 0 10 20 30 40 +REFA +REFB +REFC SHDN V CMRR (V/V = ppm) 6375 TA01a 6375 TA01b 15V 6375f 1 For more information www.linear.com/LT6375 NUMBER OF UNITSLT6375 ABSOLUTE MAXIMUM RATINGS (Note 1) Output Short-Circuit Duration (Note 3) Thermally Limited Supply Voltages + Temperature Range (Notes 4, 5) (V to V ) ..............................................................60V LT6375I................................................40C to 85C +IN, IN, (Note 2) LT6375H ............................................ 40C to 125C Each Input .........................................................270V Storage Temperature Range .................. 65C to 150C Differential ........................................................540V MSOP Lead Temperature (Soldering, 10 sec) ........300C +REFA, REFA, +REFB, REFB, +REFC, REFC, + REF, SHDN (Note 2) ................ (V + 0.3V) to (V 0.3V) Output Current (Continuous) (Note 6) ....................50mA PIN CONFIGURATION TOP VIEW +IN 1 14 IN TOP VIEW +IN 1 16 IN +REFA 3 12 REFA +REFA 3 14 REFA +REFB 4 15 V 11 REFB +REFB 5 12 REFB +REFC 6 11 REFC +REFC 5 10 REFC + REF 7 10 V + V 8 9 OUT REF 6 9 V MS PACKAGE SHDN 7 8 OUT VARIATION: MS16 (12) 16-LEAD PLASTIC MSOP T = 150C, = 130C/W DF PACKAGE JMAX JA 14(12)-LEAD (4mm 4mm) PLASTIC DFN T = 150C, = 43C/W, = 4C/W JMAX JA JC EXPOSED PAD (PIN 15) IS V , MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT6375IDF PBF LT6375IDF TRPBF 6375 14-Lead (4mm 4mm) Plastic DFN 40C to 85C LT6375HDF PBF LT6375HDF TRPBF 6375 14-Lead (4mm 4mm) Plastic DFN 40C to 125C LT6375IMS PBF LT6375IMS TRPBF 6375 16-Lead Plastic MSOP 40C to 85C LT6375HMS PBF LT6375HMS TRPBF 6375 16-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: