Texas Instruments ADS41B29IRGZR

Overview

ADS41B29IRGZR from Texas Instruments is a 12-bit, 250-MSPS ultralow-power analog-to-digital converter with integrated high-impedance analog input buffer (2 pF input capacitance, 3 kΩ at 200 MHz), DDR LVDS output interface (350 mV standard swing), and on-chip DC offset correction-designed for power amplifier linearization in wireless infrastructure.

For engineers reviewing the ADS41B29IRGZR datasheet, ADS41B29IRGZR pinout, ADS41B29IRGZR application, or ADS41B29IRGZR equivalent, this page delivers verified specifications including SNR (65.5 dBFS at 170 MHz), SFDR (71 dBc at 170 MHz), 1.8-V analog/1.8-V digital/3.3-V buffer supply rails, VQFN-48 package, and functional distinctions versus ADS41B49.

Technical Context

The ADS41B29IRGZR implements a pipelined ADC architecture with integrated analog input buffers that maintain constant 3 kΩ input resistance and 2 pF capacitance up to 200 MHz, enabling stable wideband signal acquisition without external termination. It supports both DDR LVDS (500 MBPS max) and 1.8-V parallel CMOS output modes, with programmable LVDS swing (200 mV / 350 mV) and output strength (100-Ω / 50-Ω termination).

Digital features include hardware/software reset control, serial interface (SCLK/SDATA/SEN), gain and offset correction registers, and configurable data format (twos complement or offset binary) via DFS pin. The device automatically scales power at lower sampling rates while preserving dynamic performance.

Key Specifications

Pinout & Package

VQFN-48 (RGZR) package with exposed thermal pad connected to DRGND; 7 mm × 7 mm footprint, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADS41B49IRGZR, the ADS41B29IRGZR trades 2-bit resolution and ~1.5 dB SFDR for 20% lower power and identical pin compatibility; versus AD9230-250EBZ, it offers integrated buffering and LVDS simplicity at the cost of interface flexibility.

Availability

ADS41B29IRGZR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply, long-term production continuity, and TI-qualified automotive-grade traceability.

Supply support for ADS41B29IRGZR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters for industrial, communications, and automotive markets.

The ADS41Bx9 product line was designed specifically for ultralow-power, wideband digitization in wireless infrastructure-emphasizing integrated analog buffering, DDR LVDS output efficiency, and dynamic performance preservation at scaled sampling rates.

FAQ

What is the maximum analog input frequency supported by the ADS41B29IRGZR?

The ADS41B29IRGZR supports up to 600 MHz analog input frequency with 1-VPP input amplitude and 400 MHz with 1.5-VPP amplitude, as specified in the Recommended Operating Conditions table. Its analog input bandwidth is 800 MHz, but usable full-scale performance is bounded by amplitude-dependent slew and distortion limits per the datasheet's test conditions.

Does the ADS41B29IRGZR require external input termination resistors?

No-the ADS41B29IRGZR does not require external input termination resistors due to its integrated high-impedance analog input buffer, which presents a stable 3 kΩ || 2 pF load across 200 MHz. This eliminates the need for external matching networks typically required with unbuffered ADCs like the AD9230 series.

Can the ADS41B29IRGZR operate with a single 1.8-V supply?

No-the ADS41B29IRGZR requires three separate supplies: 1.8-V AVDD (analog core), 1.8-V DRVDD (digital I/O), and 3.3-V AVDD_BUF (input buffer). Using a single 1.8-V rail would prevent proper operation of the 3.3-V buffer stage and violate absolute maximum ratings for AVDD_BUF (–0.3 V to 3.9 V).

What is the latency of the ADS41B29IRGZR in default configuration?

In default configuration (gain enabled, offset correction disabled), the ADS41B29IRGZR exhibits 21 clock cycles of latency from analog input to DDR LVDS data output. With both gain and offset correction enabled, latency increases to 22 clock cycles, as confirmed in Section 6.6 of the SBAS486F datasheet.

Is the ADS41B29IRGZR pin-compatible with the ADS41B49IRGZR?

Yes-the ADS41B29IRGZR and ADS41B49IRGZR share identical VQFN-48 (RGZR) packaging, pin assignment, and mechanical footprint. All signal, power, and control pins map one-to-one; the only functional difference is resolution (12-bit vs. 14-bit) and associated dynamic performance specs.