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LTC6915CDE Datasheet(PDF) 1 Page - Linear Technology |
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LTC6915CDE Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC6915 1 6915f APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATIO s 14 Levels of Programmable Gain s 125dB CMRR Independent of Gain s Gain Accuracy 0.1% (Typ) s Maximum Offset Voltage of 10 µV s Maximum Offset Voltage Drift: 50nV/ °C s Rail-to-Rail Input and Output s Parallel or Serial (SPI) Interface for Gain Setting s Supply Operation: 2.7V to ±5.5V s Typical Noise: 2.5 µVP-P (0.01Hz to 10Hz) s 16-Lead SSOP and 12-Lead DFN Packages s Thermocouple Amplifiers s Electronic Scales s Medical Instrumentation s Strain Gauge Amplifier s High Resolution Data Acquisition Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain The LTC ®6915 is a precision programmable gain instru- mentation amplifier. The gain can be programmed to 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 through a parallel or serial interface. The CMRR is typically 125dB with a dual 5V supply with any programmed gain. The offset is below 10 µV with a temperature drift of less than 50nV/ °C. The LTC6915 uses charge balanced sampled data tech- niques to convert a differential input voltage into a single ended signal that is in turn amplified by a zero-drift operational amplifier. The differential inputs operate from rail-to-rail and the single-ended output swings from rail-to-rail. The LTC6915 can be used in single power supply applications as low as 2.7V, or with dual ±5V supplies. The LTC6915 is available in a 16-lead SSOP package and a 12-lead DFN surface mount package. , LTC and LT are registered trademarks of Linear Technology Corporation. Differential Bridge Amplifier with Gain Programmed through the Serial Interface – + 3V RESISTOR ARRAY MUX 4-BIT LATCH Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 8-BIT SHIFT-REGISTER HOLD_THRU µP TO OTHER DEVICES CS(D0) DIN(D1) CLK(D2) DOUT(D3) PARALLEL_SERIAL IN+ IN _ 3 2 11 6 7 8 9 R < 10k CS CH LTC6915 SSOP PACKAGE 0.1 µF V+ V– SHDN DGND 13 5 16 10 1 4 OUT REF 15 14 CF 6915 TA01 SENSE 3V |
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