44 Channels Multi-sensors Interface CMOS IC for Telemetry Application

In the telemetry system, multiple types of sensors are used for monitoring the physical and structural parameters of a system. These parameters are helpful for understanding the behavior of the system and to improve the performance of the system. Telemetry system integrates all the signal conditioning circuits for different types of sensors and provides digital data in the form of serial interface. To provide a compact and energy-efficient solution for telemetry, a 44 channels multi-sensors interface is implemented in single CMOS IC. In telemetry system, different types of sensors have been used which provide an output voltage in range of micro volt to 10 V. Each sensor has different noise, bandwidth and filtering requirement. This sensor interface chip (SIC) provides an integrated solution for different types of sensors used in the telemetry system. SIC used advanced circuit techniques to achieve better sensitivity and accuracy and also used the combination of high-voltage and low-voltage breakdown transistors for high level of integration. SIC has been designed and fabricated using 180 nm CMOS technology. Die area for this chip is 8 mm x 8 mm, and the package area is 20 mm × 20 mm. This chip has been tested for 10-bit accuracy of all sensor channel interface. Total power consumption of this chip is 800 mW.