Texas Instruments ADS6222IRGZR

Overview

ADS6222IRGZR from Texas Instruments is a dual-channel, 12-bit, 65 MSPS analog-to-digital converter with serial LVDS interface, internal reference, and programmable coarse/fine gain. It delivers 71.3 dBFS SINAD at 10 MHz input (0 dB gain), 83 dBc SFDR at 170 MHz (3.5 dB gain), and 315 mW total power per channel. Used in base-station IF receivers for high-density signal acquisition with low jitter and compact QFN packaging.

For engineers reviewing the ADS6222IRGZR datasheet, ADS6222IRGZR pinout, ADS6222IRGZR application, or ADS6222IRGZR equivalent, this page provides verified technical context, real-world timing behavior, LVDS serialization trade-offs, and validated alternative options for dual-channel ADC selection in RF-sampling systems.

Technical Context

The ADS6222IRGZR implements simultaneous sample-and-hold across two independent 12-bit ADC cores, each with configurable 3.5 dB coarse gain and up to 6 dB fine gain (1 dB steps). Its internal PLL multiplies the input clock to generate bit/frame clocks for LVDS serialization.

It supports both 1-wire and 2-wire LVDS output modes - the latter halves data rate to <1 Gbps using DDR bit clock and dual LVDS pairs per channel, easing FPGA receiver design while maintaining 12-clock-cycle latency and <250 fs rms aperture jitter.

Key Specifications

Pinout & Package

ADS6222IRGZR is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are defined per TI SLAS543B Rev. January 2014, with dedicated analog/digital supply pins, differential clock inputs (CLKP/CLKM), frame/bit clock outputs (FCLKP/FCLKM, DCLKP/DCLKM), and dual-channel LVDS data pairs (DA0_P/DA0_M, DA1_P/DA1_M, DB0_P/DB0_M, DB1_P/DB1_M).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6222IRGZR, ADS6223IRGZR offers higher speed at modest power cost, while ADS62P49IRGZT trades resolution and power for significantly better dynamic performance - making the ADS6222IRGZR optimal for cost- and power-sensitive 65 MSPS dual-channel IF digitization.

Availability

ADS6222IRGZR is available at Aetrix Electronics and suitable for base-station IF receivers, diversity receivers, medical ultrasound imaging, and test equipment requiring stable component supply, long-term manufacturability, and industrial temperature support (–40°C to +85°C).

Supply support for ADS6222IRGZR 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 medical markets.

The ADS622X family was designed specifically for high-density, low-power dual-channel IF sampling in wireless infrastructure and instrumentation - emphasizing LVDS interface efficiency, flexible gain control, and guaranteed no-missing-codes performance.

FAQ

What is the maximum sampling rate supported by ADS6222IRGZR?

The ADS6222IRGZR supports a maximum sampling rate of 65 MSPS, as specified in TI's SLAS543B datasheet. This rate is fixed per device variant within the ADS622X family and cannot be increased via configuration. At 65 MSPS, the ADS6222IRGZR achieves 71.3 dBFS SINAD at 10 MHz input with 0 dB coarse gain and maintains 250 fs rms aperture jitter - key parameters for IF sampling fidelity. Higher-rate variants like ADS6223IRGZR (80 MSPS) are pin-compatible but require separate qualification.

Does ADS6222IRGZR support external reference voltage?

Yes, ADS6222IRGZR supports both internal and external reference modes. When SEN pin is biased to (3/8)LVDD or 0 V, the device operates in external reference mode with full-scale input range of 2 Vpp and common-mode voltage of 1.5 V. The REFP/REFM pins become high-impedance inputs, allowing connection to precision external references. Internal reference mode (SEN = LVDD or (5/8)LVDD) provides a 1.0–2.0 V span with ±2 mV error over temperature - eliminating external components where absolute accuracy is not required.

How does the 2-wire LVDS interface of ADS6222IRGZR reduce system complexity?

The 2-wire LVDS interface of ADS6222IRGZR cuts the number of high-speed data lines in half versus traditional 1-wire serialization: each channel uses two differential pairs (e.g., DA0_P/DA0_M and DA1_P/DA1_M) instead of one, halving the serial data rate to <1 Gbps. This relaxes PCB routing constraints, reduces FPGA pin count, and improves signal integrity by widening eye openings through programmable LVDS current and internal termination. The ADS6222IRGZR maintains identical latency (12 clock cycles) and timing margins as the 1-wire mode, ensuring drop-in compatibility in existing designs.

What is the power consumption of ADS6222IRGZR at 65 MSPS?

At its rated 65 MSPS sampling rate, ADS6222IRGZR consumes 315 mW total power - comprising 140 mA from AVDD (analog supply) and 50 mA from LVDD (LVDS buffer supply) at 3.3 V. This equates to 315 mW per channel for dual-channel operation. Power scales linearly with sampling rate; at 5 MSPS, total power drops to ~77 mW in global power-down mode. The device requires no external decoupling for reference supplies, further reducing BOM count and board area in compact RF modules.

Can ADS6222IRGZR be configured via serial interface only, without parallel pins?

Yes, ADS6222IRGZR supports exclusive serial interface programming. In this mode, SEN, SCLK, and SDATA function as serial control lines, while CFG1–CFG4, PDNA, and PDNB must be tied to ground. Register access requires resetting the internal state via RESET pulse or RST bit, then setting OVRD (bit D10 of register 0x0D) to enable serial override of parallel controls. All key functions - gain, interface mode, data format, and test patterns - are accessible via 16-bit register writes, enabling software-defined configuration without hardware pin strapping.