16-Bit Programmable Delta Sigma A/D Converter with 6-Bit Latch

The 16-bit CS5529 is a low power programmable Delta Sigma analog-to-digital (A/D) converter that includes coarse/fine charge buffers, a fourth-order Delta Sigma modulator, a calibration microcontroller, a digital filter with programmable decimation rates, a 6-bit output latch, and a 3-wire serial interface. Low power, single-conversion settling time, programmable output rates and the ability to handle negative input signals make this single- or dual-supply product an ideal solution for isolated and non-isolated applications. The A/D converter is designed to operate from single or dual analog supplies and a single digital supply. The digital filter is programmable with output update rates between 1.88 Hz to 101 Hz. These output rates are specified for XIN = 32.768 kHz. Output word rates can be increased by approximately 3x by using XIN = 100 kHz. The filter is designed to settle to full accuracy for the selected output word rate in one conversion. When operated at word rates of 15 Hz or less, the filter rejects both 50 Hz and 60 Hz simultaneously.

Features

  • Delta Sigma A/D converter
    • Linearity error: 0.0015% FS
    • Noise-free resolution: 16 bits
  • 2.5 V bipolar/unipolar buffered input range
  • 6-bit output latch
  • Eight digital filters
    • Selectable-output word rates
    • Output settles in one conversion cycle
    • 50 Hz/60 Hz ±3 Hz simultaneous rejection
  • Simple 3-wire serial interface
    • Compatible with SPI™ and Microwire™
    • Schmitt Trigger on serial clock (SCLK)
  • System/self-calibration with read/write registers
  • Power supply configurations
    • VA+ = 5 V; VA- = 0 V; VD+ = 3 V to 5 V
    • VA+ = 2.5 V; VA- = -2.5 V; VD+ = 3 V to 5 V
    • VA+ = 3.0 V; VA- = -3.0 V; VD+ = 3.0 V
  • Low power consumption: 2.6 mW
  • Package: 20-pin SSOP; lead-free assembly

Parametric Specifications

Resolution (bits) 16
Throughput (Sps) 1-303
Integral Linearity (%FS) 0.0015
Differential Linearity (±LSB) NMC
Channels 1
Power Consumption (mW) 2.6
Package 20 SSOP

Technical Documents

CS5529 Product Data Sheet

Aug 10, 2005, DS246F5 : 517 Kb

CS5529 Product Bulletin

PI246PP1 : 234 Kb

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