ADS4129IRGZ25

Analog To Digital Converters (ADC) Overview

The ADS4129IRGZ25 is a 12-bit, 250MSPS analog-to-digital converter (ADC) from Texas Instruments. It operates on a single 1.8V supply, consuming 265mW at maximum sampling rate. The device features a differential analog input and supports Double Data Rate (DDR) LVDS or parallel CMOS digital output interfaces. Key electrical characteristics include a typical Signal-to-Noise Ratio (SNR) of 69dBFS at 170MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 80dBc. It includes programmable gain options up to 6dB and a DC offset correction loop. The component is housed in a 48-pin QFN package with an exposed pad.

Analog To Digital Converters (ADC) Feature Summary

• Maximum sampling rate of 250MSPS with ultralow power consumption (265mW at full speed).
• Supports DDR LVDS interface with programmable swing (350mV standard, 200mV low) and strength (100Ω default, 50Ω high).
• Includes fine gain adjustment up to 6dB for SNR/SFDR optimization and a DC offset correction loop.
• Operates over the industrial temperature range of –40°C to +85°C.

Analog To Digital Converters (ADC) Applications

• Multi-carrier wideband communications systems.
• Software-defined radio (SDR) front ends.
• Test and measurement equipment requiring high dynamic performance.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation. Suffixes such as 'R' indicate tape and reel packaging with quantities of 2500, while 'T' indicates tape and reel with quantities of 250. Confirm that the package designator RGZ corresponds to the QFN-48 form factor required for the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this model when a 12-bit resolution and 250MSPS throughput are required within a single-supply 1.8V architecture. Ensure the system can accommodate the DDR LVDS interface timing or utilize the parallel CMOS option if pin count reduction is not critical. Verify that the analog input frequency does not exceed the specified limits for the desired dynamic performance metrics.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS412x/4x family of ultralow-power ADCs. It shares pin compatibility with the previous generation ADS6149 family, facilitating migration, though supply voltages and common-mode voltages differ. The ADS4129 specifically represents the 12-bit variant operating at the highest speed in the base series, distinct from the 160MSPS ADS4126.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS4126 is a pin-compatible alternative offering 160MSPS sampling rate. For higher resolution requirements, the ADS4149 provides 14-bit performance at 250MSPS. Consider the ADS41B29 for designs requiring integrated analog input buffers.