ADS4249IRGC25

Analog To Digital Converters (ADC) Overview

The ADS4249 is a dual-channel, 14-bit, 250-MSPS ultralow-power analog-to-digital converter (ADC) from Texas Instruments. It operates on a single 1.8-V supply with a total power consumption of 560 mW at maximum sampling rates. The device features high dynamic performance, including an 80-dBc spurious-free dynamic range (SFDR) at 170 MHz and a signal-to-noise ratio (SNR) of 71.7 dBFS. Key specifications include a differential input voltage of 2 VPP, an internal common-mode voltage output of 0.95 V, and a serial interface for configuration. It supports both double data rate (DDR) LVDS and parallel CMOS digital output interfaces within a compact 9-mm × 9-mm, 64-pin VQFN package.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel 14-bit resolution with a maximum sample rate of 250 MSPS
• Ultralow power consumption of 560 mW total power using a single 1.8-V supply
• High dynamic performance: 80-dBc SFDR at 170 MHz and 71.7 dBFS SNR
• Programmable gain up to 6 dB and DC offset correction loop

Analog To Digital Converters (ADC) Applications

• Wireless communications infrastructure
• Software defined radios
• Power amplifier linearization

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'IRGC25' against the manufacturer's current orderable addendum to confirm package type and tape-and-reel quantity. Confirm that the component meets RoHS compliance standards required for the target assembly process. Ensure the design accommodates the industrial temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high-resolution 14-bit conversion is required alongside low power constraints in multi-carrier applications. Compare against the ADS4229 if 12-bit resolution is sufficient, as it offers similar power characteristics. Verify compatibility with the system's clock amplitude requirements, which support inputs down to 200 mVPP.

Analog To Digital Converters (ADC) Part Context

The ADS4249 belongs to the ADS42xx family of ultralow-power ADCs. It serves as a direct pin-compatible replacement for the previous generation ADS62P49, facilitating migration while offering improved power efficiency and a unified 1.8-V supply architecture compared to the legacy 3.3-V/1.8-V dual-supply requirement.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS4249 is pin-compatible with the ADS62P49. When migrating, note that pins 38 and 59 must be floated on the ADS4249, whereas they served as DRVDD and DRGND on the ADS62P49. Additionally, the ADS4249 requires an external VCM bias of 0.95 V instead of the 1.5 V used by the older device.