2-Channel, Low-Cost A/D Converter for Electronic Weigh-Scale Applications

The CS5550 is an easy-to-design, value-priced, highly integrated solution with a small footprint. The CS5550 enables weigh-scale manufacturers to provide accurate, cost-effective solutions for their customers. This IC from Cirrus Logic is an integrated device that combines two Delta Sigma analog-to-digital (A/D) converters, two amplifiers and a serial interface on a single chip. For communication with a microcontroller, the IC features a bi-directional serial interface, which is initialized and fully functional upon reset. The device also offers excellent temperature stability for long-life operation. The CS5550 delivers precise measurements and is ideal for electronic weigh-scale applications.

Features

  • Output word rate: 2.44 kSPS to 4.88 kSPS
  • 24-bit A/D registers on both channels
    • Channel 1: 13 ENOBs
    • Channel 2: 10 ENOBs
  • Power consumption: <12 mW
  • Adjustable input range on channel 1
  • Ground-referenced signals with single supply
  • On-chip 2.5 V reference (25 ppm/°C typ.)
  • Simple 3-wire digital serial interface
  • Power supply configurations
    • VA+ = +5 V
    • AGND = 0 V
    • VD+ = +3.3 V to +5 V
  • Offset and gain calibrations on both channels
  • Package: 24-pin SSOP; lead-free assembly

Parametric Specifications

Resolution (bits) 24
Throughput (Sps) 2440-4000
Integral Linearity (%FS) 0.01
Differential Linearity (±LSB) NMC
Channels 2
Power Consumption (mW) 21
Package 24 SSOP

Technical Documents

CS5550 Product Data Sheet

Mar 14, 2005, DS630F1 : 216 Kb

CS5550 Product Bulletin

0106-0903-PB-LP : 608 Kb

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