LTC6915 Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain Fea T Descrip T n 14 Levels of Programmable Gain The LTC 6915 is a precision programmable gain instru- n 125dB CMRR Independent of Gain mentation amplifier. The gain can be programmed to 0, n Gain Accuracy 0.1% (Typ) 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 n Maximum Offset Voltage of 10V through a parallel or serial interface. The CMRR is typi- n Maximum Offset Voltage Drift: 50nV/C cally 125dB with a single 5V supply with any programmed n Rail-to-Rail Input and Output gain. The offset is below 10V with a temperature drift of n Parallel or Serial (SPI) Interface for Gain Setting less than 50nV/C. n Supply Operation: 2.7V to 5.5V The LTC6915 uses charge balanced sampled data tech- n Typical Noise: 2.5V (0.01Hz to 10Hz) P-P niques to convert a differential input voltage into a single n 16-Lead SSOP and 12-Lead DFN Packages ended signal that is in turn amplified by a zero-drift op- erational amplifier. a T The differential inputs operate from rail-to-rail and the n Thermocouple Amplifiers single-ended output swings from rail-to-rail. The LTC6915 n Electronic Scales can be used in single power supply applications as low as n Medical Instrumentation 2.7V, or with dual 5V supplies. The LTC6915 is available n Strain Gauge Amplifier in a 16-lead SSOP package and a 12-lead DFN surface n High Resolution Data Acquisition mount package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners Typical a T Differential Bridge Amplifier with Gain Programmed through the Serial Interface LTC6915 SSOP PACKAGE + 3 IN + OUT 15 3V C C S H SENSE 14 2 IN C F R < 10k RESISTOR ARRAY REF 13 11 PARALLEL SERIAL HOLD THRU 5 4-BIT MUX LATCH 16 + V 3V 0.1F 6 CS(D0) Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 7 D (D1) IN 1 P 8-BIT SHDN 8 CLK(D2) 10 SHIFT-REGISTER DGND D (D3) 4 9 OUT TO OTHER V DEVICES 6915 TA01 6915fb 1 ion pplica ions pplica ion uresLTC6915 a Te Maxi Mu M r a T (Note 1) + Total Supply Voltage (V to V ) ................................. 11V LTC6915I .............................................40C to 85C Input Current ........................................................ 10mA LTC6915H .......................................... 40C to 125C + V V ........................................................5.5V Junction Temperature IN REF V V ........................................................5.5V (GN Package) .................................................... 150C IN REF + V V ........................................................5.5V (DFN Package) .................................................. 125C DGND V V ........................................................5.5V Storage Temperature DGND + Digital Input Voltage........................................... V to V (GN Package) ..................................... 65C to 150C Operating Temperature Range (DFN Package) ................................... 65C to 125C LTC6915C ..............................................0C to 70C Lead Temperature (Soldering 10 sec) ....................300C p in c F T TOP VIEW TOP VIEW + SHDN 1 16 V + IN 1 12 V IN 2 15 OUT + IN 2 11 OUT + IN 3 14 SENSE REF V 3 10 13 V 4 13 REF V PARALLEL SERIAL CS(D0) 4 9 HOLD THRU 5 12 NC DGND D (D1) 5 8 IN CS(D0) 6 11 PARALLEL SERIAL D (D3) CLK(D2) OUT 6 7 D (D1) 7 10 DGND IN CLK(D2) 8 9 D (D3) OUT DE12 PACKAGE 12-LEAD (4mm 3mm) PLASTIC DFN GN PACKAGE T = 125C, = 160C/W JMAX JA 16-LEAD NARROW PLASTIC SSOP EXPOSED PAD (PIN 13) IS V , MUST BE SOLDERED TO PCB T = 150C, = 135C/W JMAX JA o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6915CDE PBF LTC6915CDE TRPBF 6915 12-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC6915IDE PBF LTC6915IDE TRPBF 6915I 40C to 85C 12-Lead (4mm 3mm) Plastic DFN LTC6915CGN PBF LTC6915CGN TRPBF 6915 16-Lead Narrow Plastic SSOP 0C to 70C LTC6915IGN PBF LTC6915IGN TRPBF 6915I 16-Lead Narrow Plastic SSOP 40C to 85C LTC6915HGN PBF LTC6915HGN TRPBF 6915H 16-Lead Narrow Plastic SSOP 40C to 125C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6915CDE LTC6915CDE TR 6915 0C to 70C 12-Lead (4mm 3mm) Plastic DFN LTC6915IDE LTC6915IDE TR 6915I 12-Lead (4mm 3mm) Plastic DFN 40C to 85C LTC6915CGN LTC6915CGN TR 6915 16-Lead Narrow Plastic SSOP 0C to 70C LTC6915IGN LTC6915IGN TR 6915I 16-Lead Narrow Plastic SSOP 40C to 85C LTC6915HGN LTC6915HGN TR 6915H 16-Lead Narrow Plastic SSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: