ADS41B49IRGZ25

Analog To Digital Converters (ADC) Overview

The ADS41B49IRGZ25 is a single-channel, 14-bit analog-to-digital converter (ADC) from Texas Instruments. It supports a maximum sampling rate of 250MSPS and features an integrated high-impedance analog input buffer with 2pF input capacitance and 3kΩ input resistance. The device operates on a 1.8V analog supply (AVDD), a 3.3V buffer supply (AVDD_BUF), and a 1.8V digital supply (DRVDD). Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 69.1dBFS at 170MHz and a Spurious-Free Dynamic Range (SFDR) of 82dBc at the same frequency. It offers DDR LVDS or parallel CMOS output interfaces.

Analog To Digital Converters (ADC) Feature Summary

• Integrated High-Impedance Analog Input Buffer: Eliminates external matching components with 2pF capacitance and 3kΩ resistance.
• Ultralow Power Consumption: Draws 180mW for analog circuits, 96mW for buffers, and 135mW for I/O at 250MSPS.
• Programmable Gain and DC Offset Correction: Optimizes SFDR/SNR trade-offs and cancels internal offset errors.
• Flexible Output Interface: Supports Double Data Rate (DDR) LVDS with programmable swing/strength or standard parallel CMOS.

Analog To Digital Converters (ADC) Applications

• PA linearization in wireless infrastructure
• Multi-carrier wide bandwidth communications
• Software-defined radio systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '25' against the official datasheet ordering information. The provided documentation lists 'RGZR' and 'RGZT' as the available tape and reel options for the QFN-48 package. Confirm that the requested suffix corresponds to valid production data and does not indicate a non-standard configuration.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-channel, high-resolution ADC with integrated input buffering is required to simplify PCB layout. The ADS41B49 is suitable for applications demanding low power consumption alongside high dynamic performance (SFDR > 80dBc). Ensure the design accommodates three distinct power supplies: 1.8V for analog/digital cores and 3.3V specifically for the input buffer stage.

Analog To Digital Converters (ADC) Part Context

The ADS41B49 belongs to the ADS4xxx family of ultralow-power ADCs, sharing architectural similarities with the ADS41B29 (12-bit version) and ADS41B29/B49 variants. These devices utilize innovative design techniques to achieve high dynamic performance while minimizing power dissipation. The family is characterized by its ability to operate effectively across a wide frequency range without external input matching networks.

Analog To Digital Converters (ADC) Replacement Considerations

ADS41B29IRGZT: 12-bit resolution variant with identical pinout and power characteristics.

Analog To Digital Converters (ADC) FAQ

What are the power supply requirements for the ADS41B49?

The device requires three separate supplies: AVDD at 1.8V for the analog core, AVDD_BUF at 3.3V for the input buffer, and DRVDD at 1.8V for the digital interface.

How does the integrated analog buffer benefit the design?

The buffer provides a constant high input impedance (3kΩ, 2pF) across a wide frequency range, eliminating the need for external input matching components and simplifying the front-end circuit design.

What output interface options are supported?

The ADS41B49 supports both Double Data Rate (DDR) Low-Voltage Differential Signaling (LVDS) with programmable swing and strength, and a standard parallel CMOS interface.