MSSPSI - Smart Programmable Sensor Interface Print E-mail
description

For processing signals from a sensor or MEMS device, the Smart Programmable Sensor Interface (MSSPSI) is a monolithis CMOS integrated circuit. Small analog Signals from a sensor or MEMS are anti-aliasesd, filered and amplified before being converted into a digital signal output by the MSSPSI. These processing functions are controlled by an external uP through the MSSPSI's on-chip serial interface. The MSSPSI 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 Bliptic switched capacitor anti-aliasing filters. The gain of the filter is controllable via the serial interface up to 18 dB (6dB) steps. The next stage is a 6 pole Butterworth switched capacitor highpass filter, also with up to 10dB 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 MSSPSI operates with a supply voltage from 3.3 VDC up to 5.5 VDC. It is available in a 32 pin LQFP Package with an industrial temperature range.

 

features

  • Low Power Modes
  • Low Noise Input (30 nV/(Hz)1/2 at 100 Hz
  • Anti Alias Filter with Adjustable Gain
  • Low pass 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 and 4 input Mux

applications

  • Low Noise Sensors
  • MEMS Interface
  • Accelerometer Sensing 
  • Pressure Sensing
  • Vibration Sensing
  • Temperature Sensing
  • Test Equipment Cards/Data Acquisition Cards

downloaddatasheet

 
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