Texas Instruments ADS4222EVM

Overview

ADS4222EVM from Texas Instruments is an evaluation module designed to demonstrate and validate the ADS4222 dual-channel, 12-bit, 250-MSPS analog-to-digital converter. It supports DDR LVDS and parallel CMOS output configurations, integrates THS4509 input op-amps and CDCE72010 clock synthesis, and interfaces directly with the TSW1400 high-speed data capture card for real-time waveform analysis in RF receiver, communications test, and instrumentation applications.

For engineers reviewing the ADS4222EVM datasheet, ADS4222EVM pinout, ADS4222EVM application, or ADS4222EVM equivalent, this page delivers verified hardware configuration options, jumper-controlled interface modes (SPI/parallel), on-board clock generation (122.88 MHz / 245.76 MHz), ADC output format selection (LVDS vs. CMOS), and signal chain validation workflows using TI's HSDC Pro software.

Technical Context

The ADS4222EVM implements a complete signal acquisition path for the ADS4222 ADC, featuring transformer-coupled or OPA-driven (THS4509) analog inputs, selectable clock sources (external 1:4 transformer or on-board CDCE72010), and dual-output routing-DDR LVDS via onboard SN65LVDS32 drivers or 1.8-V parallel CMOS through SN74AVC16T245 level translators.

It provides full register-level control of the ADS4222 via USB-connected GUI, supporting SPI-based programming of gain, offset correction, SNRBoost (when applicable), data format (2's complement/offset binary), high-frequency mode, and low-speed mode per channel-enabling precise characterization of dynamic performance including SFDR, SNR, and ENOB under controlled lab conditions.

Key Specifications

Availability

ADS4222EVM is available at Aetrix Electronics and suitable for RF receiver prototyping, high-speed data acquisition system development, and communications test equipment validation requiring stable component supply, traceable sourcing, and long-term evaluation board continuity.

Supply support for ADS4222EVM 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and high-performance analog products for industrial, automotive, and communications markets.

The ADS42xx EVM product line was developed to accelerate evaluation of TI's high-speed dual-channel ADCs-including the ADS4222-by providing fully documented, jumper-configurable reference designs with integrated clocking, signal conditioning, and PC-based analysis tools.

FAQ

What is the primary function of the ADS4222EVM?

The ADS4222EVM is an evaluation module built specifically to characterize and validate the ADS4222 dual-channel, 12-bit, 250-MSPS analog-to-digital converter. It enables engineers to evaluate dynamic performance metrics-including SNR, SFDR, and ENOB-under real-world signal chain conditions using configurable analog inputs, on-board clock synthesis, and direct integration with TI's TSW1400 capture platform and HSDC Pro software. The ADS4222EVM itself contains no ADC silicon; it hosts and interfaces with the ADS4222 device.

Does the ADS4222EVM include the ADS4222 IC, or must it be purchased separately?

The ADS4222EVM ships with the ADS4222 IC pre-mounted and soldered onto the board. No separate purchase of the ADS4222 is required to operate the evaluation module. The board is delivered as a complete, ready-to-use system-including all passive components, clock circuitry, power regulation, and USB interface-designed for immediate connection to a host PC and TSW1400 capture card for signal analysis.

Can the ADS4222EVM generate its own sampling clock, or does it require an external source?

The ADS4222EVM supports both external and internal clock generation. By default, it accepts a clock signal via transformer coupling at J19. Alternatively, it can synthesize clocks using the on-board CDCE72010 clock generator-producing 122.88 MHz or 245.76 MHz LVCMOS outputs depending on the installed VCXO (491.52 MHz or 983.04 MHz). Configuration requires jumper changes per Table 4 in the SLAU333A user's guide. The ADS4222EVM does not include a crystal oscillator by default but supports on-board VCXO placement.

What output formats does the ADS4222EVM support for the ADS4222 ADC?

The ADS4222EVM supports two mutually exclusive output formats: DDR LVDS (default) and 1.8-V parallel CMOS. DDR LVDS uses onboard SN65LVDS32 drivers and connects to FPGA or logic analyzers via differential pairs. Parallel CMOS requires installing SN74AVC16T245 translators and reconfiguring jumpers JP26/JP27 and RN5–RN12 per Table 5; output appears at 40-pin headers J1 (Channel A) and J2 (Channel B). Both modes are hardware-selectable-no firmware change is needed.

Is the ADS4222EVM compatible with other ADCs in the ADS42xx family?

Yes-the ADS4222EVM is part of the unified ADS42xx EVM Rev B platform and supports multiple devices in the ADS42xx family, including ADS4225, ADS4242, ADS4245, and ADS4249, via software-selectable device configuration in the ADS42xx/58C28 GUI. Jumper settings (e.g., JP14, JP5–JP7) and register maps are shared across the family, enabling reuse of the same hardware for evaluating different resolution/speed variants. However, performance validation remains specific to each ADC's datasheet specifications-not extrapolated from the ADS4222EVM's nominal configuration.