Delta-sigma ADC delivers for cost-sensitive industrial applications

Austin, Tex.&#8212The CS5530 is a lower-cost option to Cirrus Logic's CS5531/32/33/34 family of integrated
delta-sigma A/D converters for weigh scales, low-cost temperature controllers, digital panel meters, and process control modules. At about $4, the single-channel fixed-gain (64) CS5530 provides the same low-noise performance and output word rate flexibility as the CS5532, a dual-channel, progammable gain (1-64) device that is priced at a little more than $6.

“With the CS5530 A/D converter, we have built upon the success of our popular CS553X family of delta-sigma converters by delivering a cost-reduced solution that offers excellent performance for the higher-volume segments of the industrial measurement market,” said
John Paulos, vice president and general manager for the Industrial Products Division.

The CS5530's chopper-stabilized instrumentation amplifier has a noise density of 12 nanovolts per root hertz at 0.01 Hz. Digital scaling is also available, which can provide additional effective gain of up to 40. The delta-sigma modulator is identical to that used throughout the CS533X product family and features both 50-Hz and 60-Hz rejection. The range of user-selectable output word rates is also the same, with 20 rates between 6.25 and 3,840 samples per
second (SPS) when operating from a 4.9152 MHz master clock. With a simple three-wire SPI and microwire-compatible serial interface, the CS5530 is easily connected to most popular microcontrollers.

Contact the company directly for the product datasheet.
Currently sampling to key customers, the CS5530 is available in a 20-lead TSSOP package and is priced at $3.99 in quantities of 1,000.

Cirrus Logic , 1-800-625-4084,

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