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ZSC31014 датащи(PDF) 13 Page - Integrated Device Technology |
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ZSC31014 датащи(HTML) 13 Page - Integrated Device Technology |
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13 / 58 page ![]() ZSC31014 Datasheet © 2016 Integrated Device Technology, Inc. 13 January 20, 2016 2 Circuit Description 2.1. Signal Flow and Block Diagram The ZSC31014 uses a charge-balancing ADC that provides low noise 14-bit samples. The system clock can operate at 1MHz (lower power, better noise performance) or 4MHz (faster sample rates). The PreAmp nulls its offset over temperature and offers a wide range of selectable analog gain settings. The on-chip digital signal processor (DSP) core uses coefficients stored in EEPROM to precisely calibrate/condition the amplified differential input signal. Temperature can be measured from an internal temperature sensor, which can be calibrated and output as well as used to compensate for temperature effects of the sensor bridge. Direct interfacing to µP controllers is facilitated via I 2C™ digital protocol or optional SPI. I2C™ is used as the calibration interface and can be used in the final application. SPI is only supported for end applications. Figure 2.1 ZSC31014 Block Diagram INMUX PreAmp VDD (2.7V - 5.5V) VSS EEPROM w/ Charge Pump & Checksum DSP Core POR/Oscillator A D 14-Bit ADC I 2C™ or SPI Interface Temperature Reference VBP RBiciLite™ ZSC31014 Bsupply Optional Bsink 0.1µF INT/SS SDA/MISO SCL/SCLK Sensor Diagnostics VBN |
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