Features
- Digital communication and calibration interfaces SPI, I2C, OWI
- Supports various sensor element configurations
- On-chip temperature sensor
- External temperature sensing supported
- Advanced 16-bit DAC output with post calibration option
- (0V to 1V) or (0V to 5V) absolute voltage output
- VDD- ratiometric voltage output
- 4mA to 20mA current-loop output
- 0V to 10V absolute-voltage output
- Programmable measurement scheduler
- DAC Output Clipping
- Self-diagnostic coverage and system safety
- On-chip diagnostics
Description
The ZSSC3241 is a sensor signal conditioning IC (SSC) for highly accurate amplification, digitization, and sensor-specific correction of resistive sensor signals. The ZSSC3241 provides best-in-class sensor-element adaptability, and it is suitable for bridge and half-bridge sensors, as well as external voltage-source element and single-element sensors in multiple configurations. Digital compensation of the sensor offset, sensitivity, temperature drift, and non-linearity is accomplished via a 26-bit math core running a correction algorithm with calibration coefficients stored in a non-volatile, reprogrammable memory. A second, separate compensation for gain and offset, and digital-output independent analog-output correction is supported for optimum adaptability of dual-domain (analog and digital) sensor solutions. The programmable, integrated sensor front-end allows optimally applying various sensors for a broad range of applications.
New functions vs. ZSSC3240
- Additional AFE configuration options
- Programmable DAC output clipping
- Separate AOUT post-scaling math
- Programmable hysteresis for EoC comparator with 2 programmable thresholds
- Optimized EMC behavior
- Same die size & pad layout and QFN24-pin-out like ZSSC3240
- EEPROM with minor changes/extensions vs. ZSSC3240
- 99% backward compatible to ZSSC3240
Parameters
| Attributes | Value |
|---|---|
| Function | Resistive SSC |
| Automotive Qual. | No |
| Supply Voltage (V) | 2.7 - 5.5 |
| Input Type | Single-bridge |
| Interface | I2C, SPI, Alarm, Ratiometric Voltage, Absolute Voltage, Current Loop, OWI |
| Adj. Analog Gain | 1.32 - 540 |
| Resolution (bits) | 24 |
| Sample Rate Max (KHz) | 2.91 |
| Temp. Range (°C) | -40 to +125°C |
Application Block Diagrams
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Current Loop Communication with AnalogPAK
AnalogPAK™ enables a 4-20mA current loop with HART modem and FSK modulation support.
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Additional Applications
- Calibrated, continuously operating sensors with digital interface and/or analog output: (absolute or ratiometric) voltage or current loop output
- Enables smart, digital sensors for energy-efficient solutions
- Pressure, flow, and level sensing
- Industrial applications; e.g. process/factory automation
- Consumer / white goods, e.g. HVAC, weight scales
- Medical applications, e.g. blood pressure, continuous smart health monitors