24-bit SSC enables high-precision barometric pressure measurement
With an integrated 26-bit digital signal processor (DSP) for linearization and calibration functions, the ZSSC3224 is optimized for high-resolution consumer, industrial, white goods and medical applications, and can also benefit mobile products such as phones and tablets.
Developed at recently acquired Zentrum Mikroelektronik Dresden AG (ZMDI), the ZSSC3224 expands a family of SSCs for high-end sensor modules. Offering both accuracy and high resolution, the sensor interface delivers high-accuracy amplification and a 24-bit precision full-featured analog-to-digital converter.
With a 24-bit output signal, the ZSSC3224 is ideal for high-precision measurement systems, including barometric altitude measurement for portable navigation or emergency call systems; altitude measurement for car navigation; pressure measurements inside hard disks; and weather forecasting equipment. The device – available in die and wafer form – can also adapt thermopile sensors to enable contactless temperature measurements of objects or human body temperature.
The ZSSC3224 offers features targeting battery-driven, low-power devices, such as 1 mA typical overall current consumption, ultra-low 20 nA typical sleep mode current, and a 1.68 V to 3.6 V power supply range. Featuring an intelligent power-save scheme to help ensure the lowest overall current consumption, the device also offers internal filter options for low noise output signals and intelligent alarm and interrupt capabilities. The ZSSC3224 eliminates the need for an external buffer capacitor and it provides a superior power supply rejection ratio (PSRR) of up to 90 dB at 2 V, making it attractive for applications in harsh environments.
Digital compensation of signal offset, sensitivity, temperature and non-linearity is accomplished via an internal correction algorithm with coefficients stored on-chip in a highly reliable, nonvolatile, programmable memory.
Availability and Pricing
The ZSSC3224 is available in production quantities.