Interface IC gives 14-bit direct digital output from bridge sensors
The ZSC31014 can compensate the measured signal for offset, 1st and 2nd order span, and 1st and 2nd
order temperature (Tco and Tcg). It is suited for sensor specific correction of bridge sensors. Digital compensation of signal offset, sensitivity, temperature drift, and non-linearity is accomplished via an internal digital signal processor running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM.
The ZSC31014 is adjustable to nearly all piezo-resistive bridge sensors. Measured and corrected bridge values are provided at digital output pins, which can be configured as I²C or SPI. The digital I²C interface can be used for a simple PC-controlled calibration procedure to program calibration coefficients into an on-chip EEPROM. The calibrated ZSC31014 and a specific sensor are mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or laser trimming. The ZSC31014’s integrated diagnostics functions are suited for safety-critical applications.
Features include;
High accuracy (±0.1% FSO @ -25 to +85°C; ±0.25% FSO @ -40 to +125°C)
2nd order charge-balancing analogue-to-digital converter provides low noise, 14-bit data at sample rates exceeding 2 kHz
Fast power-up to data output response: 3msec at 4 MHz
Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity
Eight programmable analogue gain settings combine with a digital gain term; accommodates
bridges with spans <1 mV/V and high offset
Internal temperature compensation for sensor correction and for corrected temperature output
48-bit customer ID field for module traceability
Supply voltage is 2.7V to 5.5V; current consumption as low as 70 μA depending on programmed sample rate; in low power sleep mode it uses <2μA @ 25°C.
ZMDI; www.zmdi.com/zmdi/zsc31014-0
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
