LT1997-3 Precision, Wide Voltage Range Gain Selectable Amplifier FEATURES DESCRIPTION n Pin Configurable as a Difference Amplifier, Inverting The LT 1997-3 combines a precision operational amplifier Amplifier or Noninverting Amplifier with highly-matched resistors to form a one-chip solution n 91dB Minimum DC CMRR (Gain = 1) for accurately amplifying voltages. Gains from 13 to +14 n 65dB AC CMRR (at 100kHz, Gain = 1) with accuracy of 0.006% (60ppm) can be achieved using n 0.006% (60ppm) Maximum Gain Error (Gain = 1) no external components. The LT1997-3 is particularly well n 1ppm/C Maximum Gain Error Drift suited for use as a difference amplifier, where the excellent n 2ppm Maximum Gain Nonlinearity resistor matching results in a common mode rejection n 160V Common Mode Voltage Range ratio of greater than 91dB. n Wide Supply Voltage Range: 3.3V to 50V The amplifier features a 60V maximum input offset voltage n Rail-to-Rail Output and a 3dB bandwidth of 1.1MHz (Gain=1). The LT1997-3 n 350A Supply Current operates from any supply voltage from 3.3V to 50V and n 60V Maximum Op Amp Offset Voltage draws only 350A supply current. The output typically n 1.1MHz 3dB Bandwidth (Gain=1) swings to within 100mV of either supply rail. n Low-Power Shutdown: 20A n The resistors maintain their excellent matching over Space-Saving MSOP and DFN Packages temperature the matching temperature coefficient is APPLICATIONS guaranteed less than 1ppm/C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less n High Side or Low Side Current Sensing than 2ppm. n Bidirectional Wide Common Mode Range Current The LT1997-3 is fully specified at 5V and 15V supplies Sensing n and from 40C to 125C. The device is available in space High Voltage to Low Voltage Level Translation n saving 16-lead MSOP and 4mm 4mm DFN14 packages. Industrial Data-Acquisition Front-Ends n Replacement for Isolation Circuits All registered trademarks and trademarks are the property of their respective owners. n Differential to Single-Ended Conversion TYPICAL APPLICATION Typical Distribution of CMRR (G = 1) Gain = 1 Difference Amplifier V = 28V TO 26.5V 15V 1200 SOURCE V = 15V S V = 28V TO +26.5V + CM INA INB INC V LT1997-3 1000 4625 UNITS 2.5k FROM 3 RUNS 800 7.5k 22.5k 22.5k 600 R OUT R SENSE C V = 1mV/mA OUT 1 1 22.5k 400 + 7.5k 45k REF2 200 2.5k 45k REF1 LOAD 0 30 20 10 0 10 20 30 CMRR (V/V = ppm) +INA +INB +INC SHDN V 19973 TA01b 19973 TA01a 15V Rev A 1 Document Feedback For more information www.analog.com NUMBER OF UNITSLT1997-3 ABSOLUTE MAXIMUM RATINGS (Note 1) + Output Short-Circuit Duration Supply Voltages (V to V ) ........................................60V (Note 3) ..........................................Thermally Limited +INA, INA (Note 2) ......................................... V 160V Temperature Range (Notes 4, 5) +INB, INB, +INC, INC LT1997I-3 ................................................40 to 85C (Note 2) ..............................(V + 80V) to (V 0.3V) LT1997H-3 ............................................. 40 to 125C REF, REF1, REF2..................... (V + 60V) to (V 0.3V) + Maximum Junction Temperature .......................... 150C SHDN ..................................... (V + 0.3V) to (V 0.3V) Storage Temperature Range ......................65 to 150C Output Current (Continuous) (Note 6) ....................50mA MSOP Lead Temperature (Soldering, 10 sec) ........300C PIN CONFIGURATION TOP VIEW TOP VIEW +INA 1 14 INA 1 +INA 16 INA 3 +INB 14 INB +INB 3 12 INB 15 5 NC 4 11 NC +INC 12 INC V + REF1 6 11 V +INC 5 10 INC 7 REF2 10 SHDN V 8 9 OUT + SHDN 6 9 V MS PACKAGE REF 7 8 OUT VARIATION: MS16 (12) 16-LEAD PLASTIC MSOP T = 150C, = 130C/W JMAX JA DF PACKAGE 14(12)-LEAD (4mm 4mm) PLASTIC DFN T = 150C, = 45C/W , = 3C/W JMAX JA JC EXPOSED PAD (PIN 15) IS V , MUST BE SOLDERED TO PCB ORDER INFORMATION