IDT's New 24-bit SSC Integrated Circuit Engineered for Consumer Barometric Pressure and Thermopile Sensors

By CIOReview | Monday, February 8, 2016

SAN JOSE, CA: IDT, customer application solution provider recently introduced an energy-efficient 24-bit sensor signal conditioner (SSC) IC called ZSSC3224, manufactured for consumer barometric pressure and thermopile sensors. Integrated with a 26-bit digital signal processor (DSP), it performs the linearization and calibration functions. The technology was originally developed at ZMDI, until IDT acquired them and scaled it for release.

The ZSSC3224 IC, which comes in both die and wafer shapes, is an expansion of the SSC family of high-end sensor modules. It delivers high-accuracy amplification coupled with a 24-bit precision analog-to-digital converter and is ideal for high-precision measurement systems. The IC includes barometric altitude measurement, altitude measurement for car navigation, and pressure measurements. In addition, it also enables adaptation of thermopile sensors for contactless temperature measurements of objects.

Michael Georgi, Product Marketing Manager, IDT said, “The device is designed for use with resistive pressure sensors as well as absolute voltage sensors such as thermopiles. A stacked die assembly, combined with a dedicated MEMS sensor element, can provide the lowest form factor on the market for MEMS-based sensors.”

The ZSSC3244 comprises of an array of features for battery-driven, low-power devices, combined with a smart power-save scheme for ensuring lowest overall current consumption. An interesting feature is the presence of internal filter options for low noise output signals and intelligent alarm and interrupt capabilities. The IC does away with the need for an external buffer capacitor by providing a superior power supply rejection ratio (PSRR) of up to 90dB at 2 V.

Additional features integrated into the chip include quadratic form factor, easy programming, internal temperature measurement, and signal processing. The IC showcases accuracy better than ±0.10 percent full-scale output and works in a temperature range of 40°C to 85°C.