Texas Instruments ADS5422EVM

Overview

ADS5422EVM from Texas Instruments is an evaluation module designed specifically for the ADS5422 14-bit, 62 MSPS analog-to-digital converter. It provides two independent signal paths - one transformer-coupled (AC) and one differential amplifier-based (DC) - with dedicated power domains, buffered CMOS digital output, and configurable full-scale input ranges of 2 V_p–p, 3 V_p–p, or 4 V_p–p. It supports external clock conditioning via SN65LVDS101 and operates with ±5 V, +5 V, and +3.3 V supplies.

For engineers reviewing the ADS5422EVM datasheet, ADS5422EVM pinout, ADS5422EVM application, or ADS5422EVM equivalent, this page delivers verified hardware configuration details, power architecture, signal interface options, clocking topology, and layout-specific design constraints critical for high-speed ADC evaluation and system integration.

Technical Context

The ADS5422EVM implements dual front-end architectures: a 1:2 step-up transformer (T4–6T) for AC-coupled RF/IF sampling and a THS4502-based differential amplifier for DC-coupled baseband evaluation. Each path features isolated power routing, dedicated SMA connectors (J5/J205 for inputs; J204/J304 for clocks), and independent full-scale range selection via SEL1/SEL2 jumpers.

Signal integrity is maintained through FR-4 5-layer PCB construction (91 mm × 100 mm), internal ground/power planes (Layers 1, 2, 3), ac-coupled differential clock distribution, and SN74ALVCH16244-buffered 32-bit parallel CMOS outputs. Power delivery requires three independent rails: +5 V (ADC core & clock circuit), +3.3 V (output buffer), and ±5 V (THS4502 op-amp section).

Key Specifications

Availability

ADS5422EVM is available at Aetrix Electronics and suitable for high-speed data acquisition systems, communications test equipment, and instrumentation requiring stable component supply, repeatable evaluation platform access, and TI-validated reference design fidelity.

Supply support for ADS5422EVM 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 logic solutions for industrial, automotive, and communications markets.

The ADS5422EVM belongs to TI's high-speed data converter evaluation platform family, engineered to accelerate prototyping and characterization of precision ADCs in demanding RF, IF, and baseband signal chain applications.

FAQ

What is the primary function of the ADS5422EVM?

The ADS5422EVM is a dedicated evaluation module for the ADS5422 14-bit, 62 MSPS analog-to-digital converter. It provides two fully assembled, independently operable signal paths - one transformer-coupled for AC signals and one THS4502-based for DC-coupled inputs - enabling immediate validation of dynamic performance, clock jitter sensitivity, and full-scale range behavior without custom PCB development. The ADS5422EVM includes all necessary power regulation, clock conditioning, and buffered digital output infrastructure.

Does the ADS5422EVM support both internal and external voltage references?

Yes, the ADS5422EVM supports both internal and external reference configurations. Internal reference operation is enabled by default, with full-scale ranges set to 2 V_p–p, 3 V_p–p, or 4 V_p–p via SEL1/SEL2 jumpers. For external reference use, the VREF pin must be tied to logic high (>3.5 V), and separate REFT and REFB voltages are applied to designated test points (TP1/TP200 and TP2/TP201). This allows precise control over reference headroom and common-mode levels when interfacing with custom analog front-ends.

What power supplies are required to operate the ADS5422EVM?

The ADS5422EVM requires three independent power supplies: +5 V (for ADS5422 core and SN65LVDS101 clock translator), +3.3 V (for SN74ALVCH16244 output buffer), and ±5 V (for THS4502 differential amplifier section). These are delivered via screw terminals J1, J2, J200–J202. Supply isolation prevents noise coupling between analog signal path, clock domain, and digital output - a critical requirement for achieving >70 dB SFDR in high-speed ADC evaluation.

Can the ADS5422EVM be used to evaluate the ADS5421 as well?

Yes, the ADS5422EVM is shared with the ADS5421 and explicitly supports both devices per its official designation ADS5421/22EVM. While the ADS5421 is rated for 40 MSPS and the ADS5422 for 62 MSPS, the EVM's signal integrity, power delivery, and layout are optimized for the higher-performance ADS5422 - making it fully compatible and conservatively suitable for ADS5421 evaluation. Both devices share identical pinout, reference architecture, and interface requirements.

What clock signal specifications are required for the ADS5422EVM?

The ADS5422EVM accepts either sine-wave or square-wave clock inputs with minimum amplitude of 500 mV_p–p, applied to SMA connectors J204 (transformer path) or J304 (amplifier path). Clock signals are conditioned by SN65LVDS101 translators to produce low-jitter, low-skew differential LVDS clocks for the ADS5422's differential clock inputs. Input clock is AC-coupled to preserve internal common-mode bias, and no external termination is required due to on-board 50 Ω matching.