Datasheet LT6375 (Analog Devices)

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 97dB Minimum CMRR (LT6375A) combines excellent DC precision, a very high input common n 0.0035% (35ppm) Maximum Gain Error (LT6375A) 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 350µA 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 300µV Maximum Offset Voltage (LT6375A) 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 –40°C to 125°C Specified Temperature Range n Low Power Shutdown: 20μA (DFN Package Only) The op amp at the core of the LT6375 has Over-The-Top® n Space-Saving MSOP and DFN Packages protected inputs which allow for robust operation in envi- ronments with unpredictable voltage conditions. See the
APPLICATIONS
Applications Information section for more details. n High Side or Low Side Current Sensing The LT6375 is specified over the –40°C to 125°C 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 n Industrial Data-Acquisition Front-Ends trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Replacement for Isolation Circuits
TYPICAL APPLICATION Precision Wide Voltage Range, Bidirectional Current Monitor Typical Distribution of CMRR
15V 200 1248 UNITS VS = ±15V –REFA –REFB –REFC V+ 180 FROM 4 RUNS VIN = ±270V 19k 38k 23.75k 160 DIV = 25 190k 140 VSOURCE+ = –270V TO 270V 120 –IN 190k – 100 RSENSE OUT RC VOUT = ±10mV/mA 80 10Ω 10Ω +IN 190k + NUMBER OF UNITS 60 40 LOAD REF 20 190k 19k 38k 23.75k 0–40 –30 –20 –10 0 10 20 30 40 +REFA +REFB +REFC SHDN V– CMRR (µV/V = ppm) 6375 TA01a 6375 TA01b –15V 6375fa For more information www.linear.com/LT6375 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts