Texas Instruments ADS6122IRHBR

Overview

ADS6122IRHBR from Texas Instruments is a 12-bit, 65 MSPS analog-to-digital converter (ADC) in a 32-pin QFN package, featuring DDR LVDS or parallel CMOS outputs, programmable coarse/fine gain (3.5 dB + up to 6 dB), and internal reference with external reference support. It delivers 71.6 dBFS SINAD and 95 dBc SFDR at 10 MHz input, targeting high-fidelity digitization in wireless infrastructure and radar front-ends.

For engineers reviewing the ADS6122IRHBR datasheet, ADS6122IRHBR pinout, ADS6122IRHBR application, or ADS6122IRHBR equivalent, key selection considerations include its 65 MSPS sampling rate, dual-output interface flexibility, 3.3 V analog / 1.8–3.3 V digital supply compatibility, industrial temperature range (–40°C to 85°C), and QFN-32 thermal performance (θJA = 34 °C/W).

Technical Context

The ADS6122IRHBR employs a high-bandwidth sample-and-hold circuit and low-jitter clock buffer to maintain 69.8 dBFS SINAD at 170 MHz input with 3.5 dB coarse gain. Its architecture supports both serial (3-wire) and parallel pin-based configuration for output format (LVDS/CMOS), gain, reference mode, and data format.

It integrates a clock duty cycle stabilizer, programmable output clock position and drive strength, and internal termination for LVDS outputs-enabling robust data capture without external components. The device achieves 0.7 ns aperture delay and 150 fs rms jitter, critical for undersampling and wideband IF digitization.

Key Specifications

Pinout & Package

ADS6122IRHBR is housed in a 5 mm × 5 mm, 32-pin QFN package (RHB) with exposed thermal pad. Pin functions are validated per TI SLAS560A datasheet Figure 1 and Table 1–3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS6123IRHBR and ADS5272IPFP, the ADS6122IRHBR offers lowest power (285 mW) and highest SFDR (95 dBc) at 65 MSPS, making it optimal for single-channel, power-sensitive, high-dynamic-range applications where pin compatibility and dual-output flexibility are required.

Availability

ADS6122IRHBR is available at Aetrix Electronics and suitable for wireless infrastructure, radar systems, and test instrumentation requiring stable component supply, long-term obsolescence management, and guaranteed authentic sourcing from Texas Instruments.

Supply support for ADS6122IRHBR 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 ADS612X family-including ADS6122IRHBR-is designed for high-dynamic-range, medium-speed digitization in RF receiver chains, emphasizing low power, flexible interface options, and simplified system integration through integrated references and clock conditioning.

FAQ

What is the maximum sampling rate supported by the ADS6122IRHBR?

The ADS6122IRHBR supports a maximum sampling rate of 65 MSPS, as specified in the SLAS560A datasheet. This rate is guaranteed across the full industrial temperature range (–40°C to 85°C) with AVDD = DRVDD = 3.3 V and proper clock signal integrity. Exceeding this rate may result in degraded AC performance including reduced SFDR and increased aperture jitter.

Does the ADS6122IRHBR require external decoupling capacitors for its internal reference?

No, the ADS6122IRHBR does not require external decoupling capacitors for its internal reference. As stated in the datasheet, the device eliminates traditional reference pins and associated external decoupling, integrating a stable 1 V–2 V internal reference. This reduces PCB footprint and BOM cost while maintaining ±5 mV reference error over temperature.

Can the ADS6122IRHBR operate with a 1.8 V digital supply voltage?

Yes, the ADS6122IRHBR supports DRVDD from 1.8 V to 3.3 V, enabling direct interfacing with 1.8 V FPGA I/O banks. At 1.8 V DRVDD, the CMOS output drive strength is reduced, and LVDS operation is not supported-only CMOS mode is functional. Power consumption drops to 285 mW (CMOS) under these conditions.

What output interface modes does the ADS6122IRHBR support?

The ADS6122IRHBR supports two output interface modes: DDR LVDS and parallel CMOS. Mode selection is configurable via the SEN pin in parallel control mode or register 0x00 in serial mode. DDR LVDS uses six differential pairs for 12-bit data plus CLKOUTP/CLKOUTM, while CMOS uses 12 single-ended outputs with a separate CLKOUT.

Is the ADS6122IRHBR pin-compatible with other devices in the ADS612X family?

Yes, the ADS6122IRHBR is pin-compatible with ADS6123IRHBR, ADS6124IRHBR, and ADS6125IRHBR within the ADS612X family. All share the identical 32-pin QFN (RHB) package, identical pinout, and compatible power/ground/bias connections-enabling drop-in upgrades to higher sampling rates without PCB redesign.