LT6376 230V Common Mode Voltage G = 10 Difference Amplifier FEATURES DESCRIPTION n 230V Common Mode Voltage Range The LT 6376 is a gain of 10 difference amplifier which n 105nV/Hz Input Referred Noise (Resistor combines excellent DC precision, a very high input Divider = 3.1) common mode range and a wide supply voltage range. n 90dB Minimum CMRR It includes a precision op amp and a highly-matched n 0.0075% (75ppm) Maximum Gain Error thin film resistor network. It features excellent CMRR, n 1ppm/C Maximum Gain Error Drift extremely low gain error and extremely low gain drift. n 2ppm Maximum Gain Nonlinearity Comparing the LT6376 to existing difference amplifiers n Wide Supply Voltage Range: 3.3V to 50V with high common mode voltage range, the gain of 10 n Rail-to-Rail Output and selectable resistor divider ratios of the LT6376 offer n 350A Supply Current superior system performance by allowing the user to n Selectable Internal Resistor Divider Ratio achieve low input referred noise with maximum preci- n 200V Maximum Input Offset Voltage sion and speed. n 300kHz 3dB Bandwidth (Resistor Divider = 3.1) n The op amp at the core of the LT6376 has Over-The-Top 160kHz 3dB Bandwidth (Resistor Divider = 10.3) n protected inputs which allow for robust operation in envi- 40C to 125C Specified Temperature Range n ronments with unpredictable voltage conditions. See the Low Power Shutdown: 20A (DFN Package Only) n Applications Information section for more details. Space-Saving MSOP and DFN Packages The LT6376 is specified over the 40C to 125C tem- APPLICATIONS perature range and is available in space-saving MSOP16 n High Side or Low Side Current Sensing and DFN14 packages. n Bidirectional Wide Common Mode Range Current Sensing All registered trademarks and trademarks are the property of their respective owners. n High Voltage to Low Voltage Level Translation n Precision Difference Amplifier n Replacement for Isolation Circuits TYPICAL APPLICATION Precision Wide Voltage Range, Bidirectional Current Monitor Typical Distribution of CMRR 25V 120 + REFA REFB REFC V 638 UNITS V = 25V S FROM TWO RUNS V = 230V IN 19k 38k 23.75k 100 DF14(12) DIV = 10.3 760k + V = 230V TO 230V SOURCE 80 76k IN 60 R OUT SENSE R C V = 10mV/mA OUT 1 1 76k +IN + 40 REF LOAD 20 760k 19k 38k 23.75k 0 40 30 20 10 0 10 20 30 40 +REFA +REFB +REFC SHDN V CMRR (V/V = ppm) 6376 TA01a 6376 TA01b 25V 6376f 1 For more information www.linear.com/LT6376 NUMBER OF UNITSLT6376 ABSOLUTE MAXIMUM RATINGS (Note 1) Output Short-Circuit Duration (Note 3) Thermally Limited Supply Voltages + Temperature Range (Notes 4, 5) (V to V ) ..............................................................60V LT6376I ...............................................40C to 85C +IN, IN, (Note 2) LT6376H ............................................ 40C to 125C Each Input .........................................................240V Storage Temperature Range .................. 65C to 150C Differential ........................................................480V 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 TOP VIEW +IN 1 14 IN 1 +IN 16 IN 3 +REFA 14 REFA +REFA 3 12 REFA 5 +REFB 4 15 V 11 REFB +REFB 12 REFB +REFC 6 11 REFC + +REFC 5 10 REFC 7 REF 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, q = 130C/W JMAX JA DF PACKAGE 14(12)-LEAD (4mm 4mm) PLASTIC DFN T = 150C, q = 43C/W, q = 4C/W JMAX JA JC EXPOSED PAD (PIN 15) IS V , MUST BE SOLDERED TO PCB ORDER INFORMATION