20-bit Delta-Sigma ADC

Burr Brown's DDC112 is a dual input, wide dynamic range, charge-digitizing ADC with 20-bit resolution. It is designed to accept low-level input currents from direct photosensor digitizer applications such as CT scanners, infrared heat detectors, liquid or gas chromatography, and blood analysis.

The DDC112 combines the functions of current-to-voltage conversion, integration, input programmable full-scale gain amplification, A/D conversion, and digital filtering.

It offers the ability to use external integrating capacitors thus allowing a user-programmable full-scale range up to 1000pC. The serial I/O register can be configured to allow multiple DDC112 units to be cascaded. Other features include single supply operation, integral linearity, and digital filter noise reduction.

Burr-Brown Corp., P.O. Box 11400, Tucson, AZ 85734. Phone: 520-746-1111; Fax: 520-746-7401.