Texas Instruments ADC32J22EVM

Overview

ADC32J22EVM from Texas Instruments is an evaluation module designed to characterize the ADC32J22 - a dual-channel, 12-bit, JESD204B-compliant analog-to-digital converter with 50 MSPS sampling rate, 1.8-V single-supply operation, and onboard LMK04828 clock generator for deterministic SYSREF timing. It supports transformer-coupled differential analog inputs and USB-based SPI control via HSDC Pro GUI.

For engineers reviewing the ADC32J22EVM datasheet, ADC32J22EVM pinout, ADC32J22EVM application, or ADC32J22EVM equivalent, this page delivers verified hardware configuration options, JESD204B lane setup guidance, DC/AC coupling resistor swap instructions, onboard power path selection (LDO vs. DC/DC), and real-world test setup integration with TSW14J56.

Technical Context

The ADC32J22EVM implements a complete signal chain for the ADC32J22: dual-channel analog input paths use 1:1 baluns for amplitude/phase balance, while the onboard LMK04828 provides programmable JESD204B-compliant clocking with SYSREF synchronization. It supports both external clock injection (via EXT_ADC_CLK) and internal clock generation (LMK_CLKIN → DCLKOUT6/7).

Power architecture includes dual low-noise LDOs (1.8 V for ADC, 3.3 V for LMK04828), configurable via JP9/J10 (1.8 V) and JP12/J13 (3.3 V); default operation uses LDOs, but jumpers allow bypass to DC/DC converters (U8, U11) with corresponding feedback resistor installation (R152, R163).

Key Specifications

Availability

ADC32J22EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, radar front-end prototyping, and communications receiver development requiring stable component supply, full documentation traceability, and long-term evaluation platform availability.

Supply support for ADC32J22EVM 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 specializing in analog, embedded processing, and high-performance data conversion technologies, with over 90 years of innovation in precision electronics.

The ADC32J22EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate JESD204B-based system validation for communications infrastructure, test equipment, and defense electronics.

FAQ

What is the primary function of the ADC32J22EVM?

The ADC32J22EVM is a dedicated evaluation module for the ADC32J22 analog-to-digital converter. It provides a fully configured hardware platform-including analog input circuitry, LMK04828 clock generation, JESD204B lane routing, and USB-based SPI control-to enable rapid characterization of dynamic performance, timing alignment, and system-level integration. The ADC32J22EVM itself is not a production component but a validated reference design for evaluating the ADC32J22 under real-world conditions.

Does the ADC32J22EVM support DC-coupled analog inputs?

Yes, the ADC32J22EVM supports DC-coupled operation. Unlike earlier sLVDS EVMs, the ADC32J22EVM ships with THS4541RGT amplifiers preinstalled. To enable DC coupling, users must replace specific surface-mount resistors near the baluns (R137, R216, R225, R227–R228, R218, R232, R235) per Table 7 in SLAU579D, while removing the AC-coupling set (R217, R258, R226, R219, R233, R234). This configuration routes baseband signals directly to the ADC32J22 inputs without blocking capacitors.

How is clocking implemented on the ADC32J22EVM?

The ADC32J22EVM features dual clocking modes: (1) onboard clock generation using the LMK04828, which produces synchronized ADC sampling clocks and SYSREF frames; and (2) external clock injection via the EXT_ADC_CLK SMA connector. The LMK04828 is configured through the HSDC Pro GUI and supports JESD204B subclass 1 timing requirements. Clock outputs (DCLKOUT6P/N, DCLKOUT7P/N) are accessible via test points for probing and system-level clock distribution verification.

Which software is required to operate the ADC32J22EVM?

The ADC32J22EVM is controlled exclusively via Texas Instruments' HSDC Pro GUI software. This application provides tabbed register access (Common, ADC32Jxx, LMK04828), real-time configuration of dither, gain, chopper, test patterns, and clock dividers, and seamless data capture when paired with TI's TSW14J56 pattern generator. The ADC32J22EVM requires the ADC3xxxx_Installer_vxpx package for driver and GUI installation; USB enumeration relies on TI-signed CDC drivers loaded during first connection.

Can the ADC32J22EVM be used with other ADC3xJxx devices?

Yes - the ADC32J22EVM is part of the unified ADC3xJxxEVM platform and is mechanically and electrically compatible with all dual-channel JESD204B variants in the ADC32Jxx family (e.g., ADC32J23, ADC32J24, ADC32J42–ADC32J45). Pin-compatible layout, shared jumper configurations (JP9/J10, JP12/J13), identical HSMC interface, and common GUI support allow direct substitution of these ADCs on the same board, enabling comparative evaluation across sampling rates (50–160 MSPS) and resolution grades (12-/14-bit) without hardware change.