Texas Instruments ADS6244IRGZT

Overview

ADS6244IRGZT from Texas Instruments is a dual-channel, 14-bit, 105 MSPS analog-to-digital converter with serialized LVDS outputs, simultaneous sample-and-hold architecture, and internal reference support. It delivers 73.4 dBFS SINAD at 10 MHz input (0 dB gain), 91 dBc SFDR at same condition, and operates from 3.3-V analog/digital supplies in a 48-pin QFN package. It is used in base-station IF receivers requiring high dynamic range and low power per channel (405 mW).

For engineers reviewing the ADS6244IRGZT datasheet, ADS6244IRGZT pinout, ADS6244IRGZT application, or ADS6244IRGZT equivalent, this page provides verified technical context, validated pin functions, confirmed performance trade-offs (e.g., 105 MSPS vs. 125 MSPS ADS6245), and real-world interface constraints including 2-wire DDR LVDS serialization, programmable coarse/fine gain, and internal PLL-derived bit clock generation.

Technical Context

The ADS6244IRGZT implements a dual 14-bit pipeline ADC core with simultaneous sampling on two independent channels, each featuring 3.5 dB coarse gain and up to 6 dB programmable fine gain in 1-dB steps. Its internal PLL multiplies the input sampling clock to generate the LVDS bit clock, enabling serialization of 14-bit data per channel over two differential pairs.

It supports both 1-wire and 2-wire LVDS output interfaces, with the 2-wire mode halving serial data rate to <1 Gbps; output formatting (MSB/LSB first, 2's complement/offset binary) and internal/external reference selection are configurable via parallel pins (CFG1–CFG4, SEN) or serial register interface. The device is specified for –40°C to +85°C and requires no external decoupling for its internal reference.

Key Specifications

Pinout & Package

ADS6244IRGZT is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are validated per TI SLAS542B Rev. December 2013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6244IRGZT, ADS6245IRGZT extends usable bandwidth by 20 MSPS at higher power, while ADS6243IRGZT reduces power by 55 mW/channel at the cost of 25 MSPS bandwidth-both retain identical pinout, LVDS interface, and configuration logic for seamless migration within the ADS624X family.

Availability

ADS6244IRGZT is available at Aetrix Electronics and suitable for base-station IF receivers, medical ultrasound imaging systems, and automated test equipment requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and guaranteed 14-bit no-missing-codes performance.

Supply support for ADS6244IRGZT 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 and embedded processing technologies, with decades of expertise in high-performance data converters and signal chain solutions.

The ADS624X product line was designed specifically for demanding communications and instrumentation applications requiring dual-channel synchronization, high SFDR, and LVDS interface density-targeting wireless infrastructure, medical imaging, and precision test systems.

FAQ

What is the maximum sampling rate supported by ADS6244IRGZT?

The ADS6244IRGZT supports a maximum sampling rate of 105 MSPS, as confirmed in TI's SLAS542B datasheet Table 1 and Electrical Characteristics section. This rate is factory-trimmed and guaranteed across the full industrial temperature range (–40°C to +85°C) with AVDD = LVDD = 3.3 V. Exceeding 105 MSPS may result in degraded AC performance or timing violations.

Does ADS6244IRGZT require external decoupling capacitors for its internal reference?

No, ADS6244IRGZT does not require external decoupling capacitors for its internal reference. As stated in the datasheet DESCRIPTION section, "No External Decoupling Required for References." The internal reference is fully integrated and stabilized on-die, simplifying layout and reducing BOM count for space-constrained designs like portable ultrasound probes.

How is the LVDS output interface configured on ADS6244IRGZT?

The ADS6244IRGZT supports both 1-wire and 2-wire LVDS output modes, selected via CFG1 pin or register 0x0C bit D0. In 2-wire DDR mode (default), each channel's 14-bit data is serialized across two differential pairs (e.g., DA0/DA1 for Channel A), halving the bit clock frequency to <1 Gbps. Output polarity, MSB/LSB order, and data format are configurable via CFG4 or serial registers.

What is the channel-to-channel aperture delay variation for ADS6244IRGZT?

The channel-to-channel aperture delay variation for ADS6244IRGZT is ±80 ps, as specified in the Timing Specifications table (parameter "Aperture delay variation") under "Channel-channel within same device." This tight matching ensures phase coherence between dual channels, critical for I/Q demodulation and beamforming algorithms in wireless infrastructure applications.

Can ADS6244IRGZT operate with an external reference voltage?

Yes, ADS6244IRGZT supports external reference operation. When SEN pin is set to 0 V or (3/8)LVDD, the device uses external reference mode with VCM = 1.5 V ±0.05 V (Table 6). The external reference must be applied differentially across REFP/REFM pins, and the internal reference is disabled-enabling traceable calibration in metrology-grade test equipment.