DDC112UK/1K

Analog To Digital Converters (ADC) Overview

The DDC112UK/1K is a dual-input, 20-bit charge-measuring analog-to-digital converter (ADC) from Texas Instruments. It features two independent channels with continuous integration capabilities using dual switched integrators per input. The device operates on a single 5V supply and provides programmable full-scale ranges via internal capacitors or external components. It utilizes a delta-sigma architecture with digital filtering to achieve low noise performance. The component is housed in a 28-pin SOIC package and supports an operating temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Dual current inputs with continuous integration using alternating A/B integrator sides
• 20-bit resolution with integral linearity error of ±0.025% reading ±1.0ppm FSR
• Programmable full-scale ranges from 50pC to 1000pC using internal or external capacitors
• Low RMS noise of 3.2ppm with zero sensor capacitance

Analog To Digital Converters (ADC) Applications

• Direct photosensor digitization
• CT scanner data acquisition systems
• Infrared pyrometers
• Precision process control
• Liquid/gas chromatography

Analog To Digital Converters (ADC) Procurement Notes

Verify the '/1K' suffix indicates tape and reel packaging containing 1000 units per reel. Confirm the 'U' designation corresponds to the SO-28 package and the 'K' suffix specifies the commercial temperature grade of 0°C to +70°C. Ensure the source document matches the SBAS085A revision for accurate electrical specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this part for applications requiring high-precision measurement of low-level currents or charge packets. The dual-channel design allows simultaneous signal processing. External integrating capacitors can extend the full-scale range up to 1000pC. Ensure the system clock frequency aligns with the specified 15MHz maximum for the UK variant to maintain timing integrity.

Analog To Digital Converters (ADC) Part Context

This component belongs to the DDC112 family of charge-digitizing ADCs. The DDC112UK/1K is the tape and reel version of the DDC112UK. Other variants include the DDC112U for industrial temperature ranges and the DDC112Y series in TQFP-32 packages. All share the same core monolithic charge measurement architecture.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.