Low Power, Multi-Channel Decimation Filter

The CS5376 is a multi-function, digital filter utilizing a low-power signal processing architecture to achieve efficient filtering for up to four Delta-Sigma modulators. Used in combination with the CS5371 and CS5372 Delta-Sigma modulators, a unique high- resolution A/D measurement system results.

Digital filter co-efficients for the CS5376 FIR and IIR filters can be programmed for custom applications, or the on-chip co-efficient set can be used for a simple setup. Filter configuration is initialized through a serial port using a micro-controller or a configuration EEPROM.

The CS5376 includes a test bit stream generator that produces a 1-bit, Delta-Sigma modulated output suitable for driving a test D/A converter. It also includes 12 general purpose I/O pins for local hardware control, a secondary master mode SPI port to communicate with serial peripherals, and an IEEE 1149.1 JTAG test port for boundary scan.

• 1 to 4 channel digital decimation filters
  • Co-efficient programmable FIR filters
  • Co-efficient programmable IIR filters
  • On-chip FIR and IIR co-efficient set
• 62.5 sps - 4000 sps output word rate
• Programmable offset and gain correction
• High-speed serial data output port
• D/A converter test bit stream generator
• 12 general purpose I/O pins
• Secondary master mode serial port
• IEEE 1149.1 JTAG test access port
• Configuration by micro-controller or EEPROM
• Low power at < 6 mW per channel
• 3 or 5V operation
• Package: 64-pin TQFP