Texas Instruments ADS4222IRGCR

Overview

ADS4222IRGCR from Texas Instruments is a dual-channel, 12-bit, 65 MSPS analog-to-digital converter (ADC) optimized for ultralow-power operation on a single 1.8-V supply. It delivers 71.4-dBFS SNR and 88-dBc SFDR at 170 MHz input frequency, supports DDR LVDS and parallel CMOS output interfaces, and integrates DC offset correction for communications receiver front-ends in wireless infrastructure.

For engineers reviewing the ADS4222IRGCR datasheet, ADS4222IRGCR pinout, ADS4222IRGCR application, or ADS4222IRGCR equivalent, key selection criteria include its 65 MSPS sampling rate, 12-bit resolution with verified SNR/SFDR performance at RF frequencies, VQFN-64 package compatibility, and dual-channel synchronous sampling capability for I/Q signal digitization.

Technical Context

The ADS4222IRGCR employs a time-interleaved pipeline architecture with integrated digital calibration to achieve high dynamic performance while maintaining ultralow power consumption (183 mW total at 65 MSPS). Its dual-channel design supports independent analog inputs (INP_A/INM_A and INP_B/INM_B) with shared clocking and synchronized sampling.

It features programmable gain up to 6 dB for SNR/SFDR trade-off, internal reference generation eliminating external reference pins, and configurable output interface modes-DDR LVDS with selectable 350-mV or 200-mV swing, or 1.8-V parallel CMOS-enabling flexible system-level data capture and timing alignment.

Key Specifications

Pinout & Package

VQFN-64 (9.00 mm × 9.00 mm) with exposed thermal pad connected to DRGND; RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 12-bit, sub-100-MSPS ADC applications.

Compared with ADS4225IRGCR, the ADS4222IRGCR trades sampling speed for lower power and thermal footprint; compared with AD9233BCPZ-65, it provides native dual-channel coherence and interface flexibility at the cost of larger package size and higher pin count.

Availability

ADS4222IRGCR is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and power amplifier linearization applications requiring stable component supply across extended production lifecycles.

Supply support for ADS4222IRGCR 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 ADS42xx family-including ADS4222IRGCR-is designed specifically for ultralow-power, high-dynamic-range digitization in multi-carrier wireless infrastructure and SDR platforms where thermal density and RF performance are critical.

FAQ

What is the maximum input frequency supported by the ADS4222IRGCR while maintaining specified SNR and SFDR?

The ADS4222IRGCR achieves 71.4-dBFS SNR and 88-dBc SFDR at a 170-MHz input frequency, as validated in the official datasheet (SBAS533E, Section 7.6). Performance remains within specification up to the Nyquist limit of 32.5 MHz for baseband sampling, but the device is characterized for IF sampling well beyond that-up to 170 MHz-making it suitable for direct-conversion and low-IF architectures.

Does the ADS4222IRGCR require an external reference voltage?

No, the ADS4222IRGCR does not require an external reference voltage. It integrates an internal reference generator, eliminating the need for REFIO/REFTN pins and associated decoupling capacitors. The VCM pin outputs a stable 0.95-V common-mode voltage used to bias the analog inputs, further simplifying external circuitry around the ADS4222IRGCR.

Can the ADS4222IRGCR operate in both LVDS and CMOS output modes simultaneously?

No, the ADS4222IRGCR supports either DDR LVDS or parallel CMOS output mode-not both simultaneously. Mode selection is controlled via the serial interface (CTRL pins and register settings), and the pin functions differ between modes (e.g., DA0P/DA0M in LVDS vs. DA0/DA1 in CMOS). Hardware reconfiguration requires changing register values and ensuring correct termination and receiver compatibility for the selected interface.

What is the purpose of the VCM pin on the ADS4222IRGCR?

The VCM pin on the ADS4222IRGCR outputs a precise 0.95-V common-mode voltage used to bias the differential analog inputs (INP_A/INM_A and INP_B/INM_B). This eliminates the need for external resistive dividers or dedicated common-mode drivers, reducing component count and layout complexity while ensuring optimal ADC input operating point across temperature and process variation.

How does the programmable gain feature of the ADS4222IRGCR affect dynamic range?

The ADS4222IRGCR's programmable gain (up to 6 dB) adjusts the full-scale input range to optimize the trade-off between SNR and SFDR. At higher gain, smaller signals achieve better SNR but risk clipping; at lower gain, larger signals avoid saturation but reduce effective resolution. This allows system designers to tailor the ADS4222IRGCR's dynamic behavior to specific signal statistics without hardware changes.