Low Power, High Performance, 24-Bit Delta Sigma Test D/A Converter

The CS4373A is a high-performance, differential output digital/analog converter (DAC) with programmable attenuation and multiple operational modes. AC test modes measure system dynamic performance through THD and CMRR tests while DC test modes are for gain calibration and pulse tests. The CS4373A is driven by a Delta Sigma digital bit stream from the CS5376A digital filter test bit stream (TBS) generator. It has two sets of differential analog outputs, OUT and BUF, to simplify system design as dedicated outputs for testing the electronics channel and for in-circuit sensor tests. Analog output attenuation is selected by simple pin settings and matches the gain of the CS3301/02 differential amplifiers for full-scale testing at all gain ranges. The CS4373A test DAC provides self-test and precision calibration capability for high-resolution, low-frequency multi-channel measurement systems designed from CS3301/02 differential amplifiers, CS5371/72 Delta Sigma modulators and the CS5376A digital filter.

Features

  • Digital Delta Sigma input from CS5376A digital filter
  • Selectable differential analog outputs
    • Precision output (OUT±) for electronics tests
    • Buffered output (BUF±) for sensor tests
  • Multiple AC and DC operational modes
    • Signal bandwidth: DC to 100 Hz
    • Max AC amplitude: 5 VPP differential
    • Max DC amplitude: + 2.5 Vdc differential
  • Selectable attenuation to match CS3301/02
    • 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
  • Outstanding performance
    • AC (OUT): -116 dB THD typical, -112 dB max
    • AC (BUF): -108 dB THD typical, -95 dB max
    • DC absolute accuracy: 0.4% typical, 1% max
  • Low power consumption
    • AC modes / DC modes: 40 mW / 20 mW
    • Sleep mode / Power Down: 1 mW / 10 µW
  • Extremely small footprint
    • 28-pin SSOP package, 8 mm x 10 mm
  • Bipolar power supply configuration
    • VA+ = +2.5 V;VA- = -2.5 V; VD = +3.3 V

Parametric Specifications

Resolution (bits) 24
Dynamic Range (dB) 114
THD (dB) -116
Power Consumption Per Channel (mW) 10
Signal Range (Vp-p diff) 5
Package 28 SSOP

Technical Documents

CS4373A Product Data Sheet

Dec 11, 2006, DS699F2 : 726 Kb

CS4373A Product Bulletin

Nov 8, 2005, 0150-1005-PB-W : 64 Kb

More

Comprehensive Solutions