DDC112U/1K

Analog To Digital Converters (ADC) Overview

The DDC112U/1K is a dual-channel, 20-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta architecture. It features two single-ended current inputs and communicates via an SPI interface. The device operates on a single supply voltage ranging from 4.75 V to 5.25 V for both analog and digital domains. It is housed in a 28-pin SOIC package with a maximum conversion time of 220 µs and a linear error of 0.025%. The component supports an operating temperature range from -40°C to +85°C and includes an external reference type.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel input capability designed for precision current measurement applications
• High-resolution 20-bit sigma-delta architecture ensuring accurate data conversion
• Integrated SPI interface for straightforward digital communication with host processors

Analog To Digital Converters (ADC) Applications

• Computed Tomography (CT) systems
• Precision current sensing circuits
• Medical imaging equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '1K' against the official Texas Instruments datasheet to confirm it denotes the tape-and-reel packaging quantity or variant designation rather than a functional difference. Ensure the ordering part number matches the exact package style and temperature grade required for the design. Cross-reference the manufacturer's latest documentation to confirm availability status and any potential obsolescence notices before finalizing procurement plans.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high-resolution current monitoring is required within a compact surface-mount footprint. The dual-channel configuration allows simultaneous acquisition of two signals without external multiplexing. Verify that the system power supply remains stable within the 4.75 V to 5.25 V range to maintain specified performance metrics. Consider the thermal management requirements associated with the SOIC-28 package if operating near the upper temperature limits.

Analog To Digital Converters (ADC) Part Context

The DDC112U/1K belongs to the DDC112 family of delta-sigma ADCs developed by Texas Instruments. This series is engineered specifically for applications demanding high accuracy and low noise in current signal processing. The U/1K designation identifies the specific package type and reel configuration within the broader product line, maintaining compatibility with other devices in the same architectural family.

Analog To Digital Converters (ADC) Replacement Considerations

Consult the Texas Instruments DDC112 datasheet for officially listed pin-compatible alternatives or upgraded versions. Verify that any substitute maintains the 20-bit resolution and dual-channel current input specifications. Ensure the replacement part supports the same SPI interface protocol and voltage requirements.