LTC6373 36V Fully-Differential Programmable-Gain Instrumentation Amplifier with 25pA Input Bias Current FEATURES DESCRIPTION n Pin-Programmable Gains: The LTC 6373 is a precision instrumentation amplifier G = 0.25, 0.5, 1, 2, 4, 8, 16V/V + Shutdown with fully differential outputs which includes a closely- n Fully Differential Outputs matched internal resistor network to achieve excellent n Gain Error: 0.012% (Max) CMRR, offset voltage, gain error, gain drift, and gain non- n Gain Error Drift: 1ppm/C (Max) linearity. The user can easily program the gain to one n CMRR: 103dB (Min), G = 16 of seven available settings through a 3-bit parallel inter- n Input Bias Current: 25pA (Max) face (A2 to A0). The 8th state puts the part in shutdown n Input Offset Voltage: 92V (Max), G = 16 which reduces the current consumption to 220A. Unlike n Input Offset Voltage Drift: 1.7V/C (Max), G = 16 a conventional voltage feedback amplifier, the LTC6373 n 3dB Bandwidth: 4MHz, G = 16 maintains nearly the same bandwidth across all its gain n Input Noise Density: 8nV/Hz, G = 16 settings. n Slew Rate: 12V/s, G = 16 The LTC6373 features fully differential outputs to drive n Adjustable Output Common Mode Voltage high performance, differential-input ADCs. The output n Quiescent Supply Current: 4.4mA common mode voltage is independently adjustable via n Supply Voltage Range: 4.5V to 18V the V pin. The combination of high impedance inputs, OCM n 40C to 125C Specified Temperature Range DC precision, low noise, low distortion, and high-speed n Small 12-Lead 4mm 4mm DFN (LFCSP) Package differential ADC drive makes the LTC6373 an ideal candi- date for optimizing data acquisition systems. APPLICATIONS The LTC6373 is available in a 12-lead 4mm 4mm DFN n Data Acquisition Systems (LFCSP) package and is fully specified over the 40C to n Biomedical Instrumentation 125C temperature range. n Test and Measurement Equipment All registered trademarks and trademarks are the property of their respective owners. n Differential ADC Drivers n Single-Ended-to-Differential Conversion n Multiplexed Applications Gain vs Frequency TYPICAL APPLICATION Gain vs Frequency 36 R = 2k L 30 Interfacing a 40V Ground-Referenced Differential Input Signal to a 5V ADC P-P 24 15V 18 10V 5V G = 0.25 5V 1.8V 12 + 180pF 6 V 10V 0V V V REF DD 887 0 IN+ 20-BIT 6 AD4020 2.5V V LTC6373 OCM 887 SAR ADC 12 V IN IN 0.6Msps + 18 10V 5V 180pF GND 24 V V +IN 0.01 0.1 1 10 100 FREQUENCY (MHz) 6373 TA01b 10V 0V MEASURED SIGNAL CHAIN PERFORMANCE: 15V INPUT: f =1kHz, 0.5dBFS G = 16 G = 2 G = 0.5 IN 180pF SNR: 96.5dB G = 8 G = 1 G = 0.25 G = 4 THD: 122dB 6373 TA01a Rev. 0 1 Document Feedback For more information www.analog.com + V OUT CAP A2 DGND A1 A0 GAIN (dB)LTC6373 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltages + V ..................................................... V to (V + 40V) TOP VIEW + + V ............................................... V to (V + 0.3V) OUT + IN 1 12 +IN V .................................(V 0.3V) to (V + 0.3V) OCM OUT A0 2 11 A2 + A0, A1, A2, DGND ................... (V 0.3V) to (V + 0.3V) A1 3 10 DGND 13 + V +IN, IN V 4 9 CAP + + V 5 8 V OCM OUT Common Mode .................. (V 0.3V) to (V + 0.3V) +OUT 6 7 OUT Differential ..........................................................20V DFM PACKAGE Output Current (+OUT, OUT) (Note 2) ........... 40mA RMS 12-LEAD (4mm 4mm) PLASTIC DFN Output Short-Circuit Duration (+OUT, OUT) T = 150C, = 43C/W, = 3.4C/W JMAX JA JC EXPOSED PAD (PIN 13) IS V , MUST BE SOLDERED TO PCB (Note 3) ...............................................Thermally Limited Operating and Specified Temperature Range (Notes 4, 5) LTC6373I .............................................40C to 85C LTC6373H .......................................... 40C to 125C Maximum Junction Temperature .......................... 150C Storage Temperature Range .................. 65C to 150C ORDER INFORMATION TUBE TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6373IDFM PBF LTC6373IDFM TRPBF 6373 12-Lead (4mm 4mm) Plastic DFN, Side Solderable 40C to 85C LTC6373HDFM PBF LTC6373HDFM TRPBF 6373 12-Lead (4mm 4mm) Plastic DFN, Side Solderable 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. 0 2 For more information www.analog.com