Highly Integrated, Multi-function 4-Channel Decimation Filter

The CS5376A is a multi-function digital filter using a low power signal processing architecture to achieve efficient filtering for up to four Delta Sigma modulators. By combining the CS5376A with CS3301/02 differential amplifiers, the CS5371/72 Delta Sigma modulators and the CS4373A Delta Sigma digital-to-analog (D/A) converters, a synchronous high-resolution multichannel measurement system can be designed quickly and easily. Digital filter coefficients for the CS5376A FIR (finite impulse response) and IIR (infinite impulse response) filters are included on-chip for a simple setup, or they can be programmed for custom applications. Selectable digital filter decimation ratios produce output word rates from 4,000 samples per second (SPS) down to 1 SPS, resulting in measurement bandwidths ranging from 1,720 Hz to 430 mHz when using the on-chip coefficient sets. The CS5376A includes integrated peripherals to simplify system design: offset and gain corrections; a test D/A converter bitstream generator; a time-break controller; 12 general-purpose input/output pins; and a secondary SPI port.

Features

  • 3- or 4-channel digital decimation filter
    • Multiple on-chip FIR and IIR coefficient sets
    • Programmable coefficients for custom filters
    • Synchronous operation
  • Selectable-output word rate
    • 4,000, 2,000, 1,000, 500, 333 and 250 SPS
    • 200, 125, 100, 50, 40, 25, 20, 10, 5 and 1 SPS
  • Digital calibration, gain and offset corrections
  • Digital test bit-stream signal generator
    • Sine wave or impulse output mode
    • Programmable waveform data
    • Ideal for use with the CS4373A Seismic Test DAC
  • Time-break controller, general-purpose I/O
  • Secondary SPI port
  • Microcontroller or EEPROM configuration
  • Low-power consumption
    • 9.5 mW per channel at 500 SPS OWR
  • Flexible-power supplies
    • I/O interface: 3.3 V or 5 V
    • Digital logic core: 3.0 V, 3.3 V or 5 V
  • Small footprint: 64-pin TQFP

Parametric Specifications

Power Consumption Per Channel (mW) 10
Package 64 TQFP

Technical Documents

CS5376A Product Data Sheet

Sep 22, 2008, DS612F4 : 1314 Kb

CS5371A/72A/76A Product Bulletin

Sep 20, 2007, 0111-0807-PB-W : 649 Kb

Errata: CS5376A Rev. A

Sep 29, 2005, ER612A2 : 37 Kb

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