Texas Instruments ADS42B49IRGCR

Overview

ADS42B49IRGCR from Texas Instruments is a dual-channel, 14-bit, 250-MSPS analog-to-digital converter with integrated analog input buffers, 850-mW total power at full rate, 70.7-dBFS SNR at 170 MHz, and DDR LVDS/CMOS output interface - used in wideband wireless infrastructure receivers for multi-carrier signal digitization.

For engineers reviewing the ADS42B49IRGCR datasheet, ADS42B49IRGCR pinout, ADS42B49IRGCR application, or ADS42B49IRGCR equivalent, this page delivers verified specifications, validated LVDS/CMOS pin mappings, confirmed industrial-temperature operation (–40°C to 85°C), and real-world trade-offs between SFDR and SNR via programmable 0/3/6-dB gain modes.

Technical Context

The ADS42B49IRGCR employs a dual-sampling architecture with independent analog front-ends per channel, each featuring a buffered differential input (1.1 kΩ || 2.2 pF at 170 MHz) and on-chip DC offset correction. Its clocking subsystem accepts low-amplitude differential inputs (≥200 mVPP) and supports both LVDS and CMOS digital outputs with configurable swing and data format.

Two parallel 14-bit conversion paths feed into either a DDR LVDS interface (13-bit × 2 channels multiplexed across 14 differential pairs) or a 1.8-V parallel CMOS interface (28 single-ended data lines), with dedicated control pins (CTRL1–CTRL3) enabling multiple power-down states and gain settings without external configuration registers.

Key Specifications

Pinout & Package

ADS42B49IRGCR is housed in a 9.00 mm × 9.00 mm, 64-pin VQFN package (RGC) with exposed thermal pad connected to DRGND. The pinout supports two mutually exclusive interface modes: LVDS (differential data pairs) and CMOS (single-ended data lines), selected via RESET/SCLK/SEN logic state during power-up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 14-bit, high-speed ADC applications.

Compared with ADS42B49IRGCR, ADS42JB49IRGCR extends temperature range without sacrificing performance, while ADS42LB49IRGCR trades bandwidth and SNR for lower power - making ADS42B49IRGCR the balanced choice for industrial-grade wireless infrastructure where 70.7-dBFS SNR and 700-MHz input bandwidth are mandatory.

Availability

ADS42B49IRGCR is available at Aetrix Electronics and suitable for wireless communications infrastructure, software-defined radio development, and power amplifier linearization requiring stable component supply across production lifecycles.

Supply support for ADS42B49IRGCR 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, automotive, and communications markets.

The ADS42B49IRGCR belongs to TI's high-speed ADC portfolio designed specifically for wideband, low-power digitization in multi-carrier wireless infrastructure - emphasizing analog input buffering, flexible output interfaces, and thermal efficiency in compact VQFN packages.

FAQ

What is the maximum analog input frequency supported by the ADS42B49IRGCR?

The ADS42B49IRGCR supports analog input frequencies up to 700 MHz - defined by its analog input bandwidth specification with 50-Ω source and termination. At 2-VPP input amplitude, it maintains full performance up to 400 MHz; with 1.6-VPP, usable bandwidth extends to 500 MHz. This enables direct IF sampling in LTE and 5G base station receivers without additional amplification.

Does the ADS42B49IRGCR require external reference components?

No, the ADS42B49IRGCR integrates internal references and eliminates traditional REFIO/REFIO pins and associated decoupling capacitors. All reference generation is self-contained, reducing BOM count and layout complexity. The device uses these internal references to maintain specified DC accuracy (±20 mV offset error) and gain stability (±2% FS) across temperature.

How does the programmable gain feature affect SFDR and SNR in the ADS42B49IRGCR?

In the ADS42B49IRGCR, selecting +3-dB gain improves SFDR by approximately 4 dB at 170 MHz (from 85 dBc to 89 dBc) while reducing SNR by ~0.2 dB (from 70.7 dBFS to 67.8 dBFS). This trade-off is implemented via internal analog scaling and is fully characterized in the datasheet's Electrical Characteristics table - enabling precise optimization for distortion-limited or noise-limited signal chains.

Can the ADS42B49IRGCR operate in both LVDS and CMOS output modes simultaneously?

No, the ADS42B49IRGCR supports LVDS and CMOS output modes exclusively - selected at power-up via the logic states of RESET, SCLK, and SEN pins. Once configured, the interface remains fixed until reset. The pin functions differ between modes (e.g., DA0P/M in LVDS vs. DA0 in CMOS), and mixing modes would cause electrical conflicts and undefined behavior.

What thermal management considerations apply to the ADS42B49IRGCR in continuous 250-MSPS operation?

At 250 MSPS, the ADS42B49IRGCR dissipates 850 mW with a junction-to-board thermal resistance (RθJB) of 4.3°C/W. To maintain TJ ≤125°C at TA = 85°C, the PCB must provide ≤47°C/W total board-level thermal resistance - achieved via the exposed thermal pad (connected to DRGND), ≥4 thermal vias under the pad, and copper pour on inner layers. TI recommends verifying temperature rise with IR imaging during prototype validation.