The Controller Programmable Sensor Interface (MSCPSI) is a hybrid package containing two CMOS integrated circuits for processing signals from either a sensor or MEMS device. Small analog signals  are amplified, anti-aliased, and filtered before being converted into a digital signal output by the MSCPSI. These processing functions are controlled by an internal PICTM processor through the MSCPSI's on-chip serial interface. The MSCPSI also includes offset adjust, low power modes and an on-chip temperature sensor. 

The input is fed into a low noise amplifier followed by two 6th order Elliptic switched capacitor anti-aliasing filters. The gain of the filter is controllable via the serial interface up to 18 dB (6 dB steps). The next stage is a 6 pole Butterworth switched capacitor highpass filter, also with up to 18 dB of controllable gain. Following this is a 7th order Elliptic switched capacitor lowpass filter. These internal filters can be bypassed via the serial interface. The 12 bit, 160 ksps A-to-D converter provides a digital output. 

The MSCPSI operates with a supply voltage from 3.3 VDC up to 5.5 VDC. It is available in a 64 pin LQFP Package with an industrial temperature range.

 

• Low Power Modes
• Low Noise Input: <30 nV/(Hz)1/2 at 100 Hz
• Anti Alias Filter with Adjustable Gain
• Lowpass Filter with Adjustable Gain Stage
• Programmable SC Highpass Filter with Gain Adjust
• Programmable SC Lowpass Filter with Gain Adjust
• Temperature Sensor
• Offset Adjust
• 12 bit 160 ksps A-to-D Converter 4 input Mux
• 14-bit PICTM Processor with 2k FLASH memory
• 10-bit 10 ksps A-to-D Converter w/ 5 input Mux