QT301 Datasheet (QUANTUM) - CAPACITANCE TO DIGITAL CONVERTER

QT301, CAPACITANCE TO DIGITAL CONVERTER

Name SYNC CAL_DN SNS1 VSS SNS2 PWM CAL_UP VDD Function Sync Input Lower Calibration input Sense 1 line (to electrode) Negative supply (ground) Sense 2 line PWM output Upper Calibration input Positive supply 1.1 Basic Operation The QT301 has internal EEPROM to store the two calibration points.

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www.DataSheet4U.com jfbkLQ CAPACITANCE TO ANALOG CONVERTER QT301 Capacitance to Analog Converter (CAC) IC Patented charge-transfer conversion method Sub-ranging Direct-to-Analog conversion Rescaleable PWM: wide dynamic range End-to-end calibration (gain, span) via CAL pins 100 kHz PWM Spread spectrum acquisition bursts for low noise Sample on demand via Sync pin Only one external sample capacitor SYNC CAL_DN SNS1 VSS 1 8 VDD CAL_UP PWM SNS2 QT301 2 3 4 7 6 5 APPLICATIONS Fluid level se

QT301 Features

* spread-spectrum burst modulation, permitting extremely high noise rejection characteristics for very robust signals even in high EMI environments. The device requires only a single sampling capacitor (Cs) to acquire signals. The value of this capacitor controls the gain of the sensor, and it can be