DDC112YK/2KG4

Analog To Digital Converters (ADC) Overview

The DDC112YK/2KG4 is a dual-input, 20-bit analog-to-digital converter (ADC) from Texas Instruments, housed in a TQFP-32 package. It features a monolithic charge measurement architecture with sigma-delta modulation and digital filtering, achieving low-level current input noise of 3.2 ppm rms. The device supports continuous integration using two integrators per channel, allowing simultaneous digitization and integration. It operates on a single 5V supply (4.75V to 5.25V) and includes programmable full-scale ranges via internal or external capacitors. The component is specified for industrial temperature ranges (0°C to +70°C) and utilizes an SPI-compatible serial interface for data output.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel 20-bit resolution with integrated charge measurement and continuous switching integrators.
• Low noise performance: 3.2 ppm rms at low-level current inputs with zero sensor capacitance.
• Programmable full-scale range from 50pC to 1000pC using internal or external integration capacitors.
• Cascadable serial output interface supporting daisy-chaining of multiple converters.

Analog To Digital Converters (ADC) Applications

• Direct photosensor digitization
• Computed Tomography (CT) scanner Data Acquisition Systems (DAS)
• Infrared pyrometer control
• Precision process analysis and control
• Liquid/gas chromatography

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix /2KG4 corresponds to the specific tape and reel quantity and grade defined in the manufacturer's documentation. Confirm the package designation matches the TQFP-32 form factor required for the target PCB layout. Ensure compatibility with the 0°C to +70°C operating temperature range if deployed in environments exceeding standard commercial limits.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high-resolution charge measurement is required for low-current sensors. The dual-input architecture allows independent processing of two signals. Consider external integration capacitors if the application requires a full-scale range beyond the internal maximums. Ensure the system clock frequency aligns with the specified 10MHz nominal requirement for optimal noise performance.

Analog To Digital Converters (ADC) Part Context

The DDC112YK/2KG4 belongs to the DDC112 family of precision ADCs designed for charge-sensitive applications. It shares architectural similarities with the DDC101 (single channel) and DDC114 (quad channel). The 'YK' designation indicates the TQFP-32 package variant with extended temperature specifications compared to the standard 'U' series.

Analog To Digital Converters (ADC) Replacement Considerations

For single-channel requirements, the DDC101 may serve as a substitute. For quad-channel needs, the DDC114 offers expanded input capacity. Verify pinout compatibility and software register configurations when migrating between these family members.