DDC112YK/2K

Analog To Digital Converters (ADC) Overview

The DDC112YK/2K is a dual-input, 20-bit charge-digitizing analog-to-digital converter (ADC) from Texas Instruments. It features two independent current inputs with continuous integration using dual switched integrators per channel. The device operates on a single 5V supply and utilizes a sigma-delta architecture with digital filtering to achieve low noise performance of 3.2ppm rms. It offers programmable full-scale ranges via internal capacitors or external components, supporting up to 1000pC. The part is housed in a TQFP-32 package and supports cascaded operation through a serial SPI interface.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel 20-bit resolution with continuous charge integration
• Low noise performance: 3.2ppm rms at low level current input
• Programmable full-scale range from 50pC to 1000pC
• Cascadable serial output for multi-device systems

Analog To Digital Converters (ADC) Applications

• Direct photosensor digitization
• Computed Tomography (CT) scanner data acquisition systems
• Infrared pyrometer control
• Precision process analysis and control
• Liquid/gas chromatography
• Blood analysis instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix /2K indicates tape and reel packaging containing 2000 units. Confirm the YK suffix corresponds to the commercial temperature grade (0°C to +70°C) and TQFP-32 package. Ensure compatibility with external reference buffering requirements for optimal noise performance.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high precision measurement of low-level currents from sensors like photodiodes. Choose based on required full-scale range; internal capacitors offer fixed steps while external capacitors allow user-defined ranges up to 1000pC. Ensure the system clock frequency matches the desired integration time and conversion rate specifications.

Analog To Digital Converters (ADC) Part Context

This part belongs to the DDC112 family of monolithic charge measurement ADCs. It is available in SO-28 and TQFP-32 packages with various temperature grades and packaging options. The YK variant specifically denotes the commercial temperature range and surface-mount TQFP form factor.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include DDC112Y/2K (industrial temp) and DDC112UKG4 (SOIC package). Verify thermal resistance and operating temperature limits when substituting between package types or temperature grades.