ZSSC3138 Datasheet

© 2016 Integrated Device Technology, Inc.

11

January 25, 2016

The digital signal conditioning is processed by the calibration microcontroller (CMC). It is based on a correction

formula that uses sensor-specific coefficients determined during calibration. The formula is located in ROM, and

the sensor-specific coefficients are stored in EEPROM. Depending on the programmed output configuration, the

conditioned sensor signal is output as an analog signal, or alternatively can be readout via a digital serial interface

(I²C™ or ZACwire™). The configuration data and the correction parameters must also be programmed into the

EEPROM via the digital interfaces.

2.2.

Application Modes

For each application, a configuration set must be established by programming the on-chip EEPROM for the

following modes:

signal span and the zero point of the A/D conversion must be selected.

the sensor offset voltage is near to or larger than the sensor span.

second order) must also be configured. These settings influence the sampling rate and the signal

integration time, and thus, the noise immunity.

2.3.

Analog Front-End (AFE)

The analog front-end (AFE) consists of the three-stage programmable gain amplifier (PGA), the multiplexer

(MUX), and the analog-to-digital converter (ADC).