Texas Instruments ADS62P49IRGC25

Overview

ADS62P49IRGC25 from Texas Instruments is a dual-channel, 14-bit, 250-MSPS analog-to-digital converter with DDR LVDS and parallel CMOS digital outputs, internal/external reference support, and programmable gain up to 6 dB. It operates over –40°C to +85°C and targets wideband communications infrastructure requiring high SFDR at 170 MHz input (82 dBc @ 6 dB gain).

For engineers reviewing the ADS62P49IRGC25 datasheet, ADS62P49IRGC25 pinout, ADS62P49IRGC25 application, or ADS62P49IRGC25 equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing and interface details - all confirmed for the exact RGC-64 QFN variant with industrial temperature rating.

Technical Context

The ADS62P49IRGC25 implements two independent 14-bit SAR-based ADC cores with sample-and-hold circuits, each driven by a shared differential clock input (CLKP/CLKM). It integrates a digital DDR serializer for LVDS output and parallel CMOS drivers, supporting both synchronous and multiplexed data formats via serial register or parallel pin control.

Its DC offset correction loop actively cancels channel-specific analog offset, while its programmable gain stage improves SFDR at reduced full-scale input ranges without degrading SNR below 69.8 dBFS at 170 MHz. The device uses separate analog (AVDD = 3.15–3.6 V) and digital (DRVDD = 1.7–1.9 V) supplies and eliminates external reference decoupling by integrating internal reference circuitry.

Key Specifications

Pinout & Package

ADS62P49IRGC25 is housed in a 64-pin QFN package (RGC designation), 9 mm × 9 mm, 0.5 mm pitch, with exposed thermal pad. Pin functions are defined per TI SLAS635B Rev. January 2011.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS62P49IRGC25, ADS62P48IRGC25 offers identical functionality at reduced speed and power, while ADS62P29IRGC25 maintains full speed with lower resolution - enabling selection based on precise ENOB, thermal, and interface bandwidth requirements.

Availability

ADS62P49IRGC25 is available at Aetrix Electronics and suitable for wireless infrastructure, defense radar, and high-speed test equipment requiring stable component supply across extended product lifecycles.

Supply support for ADS62P49IRGC25 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.

The ADS62Pxx family was designed specifically for wideband communications infrastructure, emphasizing high SFDR, low power, and flexible digital interfacing in compact QFN packages.

FAQ

What is the maximum supported sampling rate for ADS62P49IRGC25 in LVDS versus CMOS mode?

The ADS62P49IRGC25 supports up to 250 MSPS in DDR LVDS mode, but its maximum recommended sampling rate in parallel CMOS mode is 210 MSPS. This limitation arises from digital output driver timing margins and load capacitance constraints - exceeding 210 MSPS in CMOS may cause setup/hold violations. The device's internal clock generator and LVDS serializer are optimized for the full 250 MSPS rate, making LVDS the preferred interface for peak performance.

Does ADS62P49IRGC25 require external reference decoupling capacitors?

No, ADS62P49IRGC25 does not require external reference decoupling capacitors. Its integrated internal reference circuitry eliminates the traditional REFIO/REFGN pins and associated 10-µF capacitors, simplifying PCB layout and reducing component count. However, the device retains full compatibility with external references - when used, external reference voltage must be applied to the VCM pin within –0.3 V to 2.0 V, with appropriate local decoupling per TI design guidelines.

How is channel matching performance specified for ADS62P49IRGC25?

ADS62P49IRGC25 specifies channel-to-channel gain matching as ±2% FS and aperture delay matching as ±50 ps across temperature. These values are measured between INA/INB inputs under identical conditions and are critical for I/Q demodulation accuracy. The device achieves this via matched analog front-end design and shared clock distribution - no factory calibration is required to meet these specs, and they remain valid over the full –40°C to +85°C operating range.

Can ADS62P49IRGC25 operate with a single-ended input clock?

No, ADS62P49IRGC25 requires a differential input clock applied to CLKP and CLKM pins. The datasheet specifies minimum differential amplitude (400 mV_PP), common-mode range (1.5 V ±0.1 V), and duty cycle (40–60%). While LVCMOS single-ended clocks can be AC-coupled and converted to differential using a balun or transformer, the device itself has no provision for single-ended clock input - doing so risks degraded jitter performance and failed acquisition.

What is the purpose of the SCLK and SEN pins in parallel configuration mode?

In parallel configuration mode (RESET = high), SCLK and SEN serve as analog-voltage-controlled configuration pins. SCLK selects internal vs. external reference and LVDS vs. CMOS interface; SEN selects output data format (2's complement/offset binary) and interface type. Both accept three valid voltage thresholds (0 V, 3/8 AVDD, 5/8 AVDD, AVDD) - enabling hardware-defined ADC behavior without serial programming, which simplifies boot-time initialization in FPGA-based systems.