Texas Instruments ADC32J45EVM

Overview

ADC32J45EVM from Texas Instruments is an evaluation module designed to assess the ADC32J45 - a dual-channel, 14-bit, JESD204B-compliant analog-to-digital converter with 160 MSPS sampling rate, 1.8-V single-supply operation, and onboard LMK04828 clock generator for deterministic SYSREF timing. It supports transformer-coupled or DC-coupled analog inputs and interfaces via HSMC connector to TSW14J56 data capture hardware.

For engineers reviewing the ADC32J45EVM datasheet, ADC32J45EVM pinout, ADC32J45EVM application, or ADC32J45EVM equivalent, this page provides verified technical context, power configuration options, USB-based SPI GUI control, JESD204B lane setup guidance, and hardware-level coupling mode modification procedures.

Technical Context

The ADC32J45EVM implements a dual-channel JESD204B interface with two lanes (one per ADC core), supporting subclass 1 deterministic latency via onboard LMK04828 clock synthesizer and SYSREF distribution. It uses transformer-coupled differential analog input paths with 50-Ω termination and configurable AC/DC coupling through resistor swaps on channels B and C.

Power architecture includes dual-output DC/DC converter (TPS62080) stepping 5 V down to 4 V and 2.8 V, followed by low-noise LDOs (TPS7A4700) generating 3.3 V for LMK04828 and 1.8 V for ADC/USB circuits. Jumpers JP9–JP10 and JP12–JP13 allow bypassing LDOs in favor of switcher outputs.

Key Specifications

Availability

ADC32J45EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, radar signal processing, and communications test equipment requiring stable component supply, full evaluation support, and traceable sourcing.

Supply support for ADC32J45EVM 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 and embedded processing solutions for industrial, automotive, and communications applications.

The ADC32J45EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate validation of JESD204B-based receiver systems with deterministic timing, low-latency data capture, and flexible analog input conditioning.

FAQ

What is the primary function of the ADC32J45EVM?

The ADC32J45EVM is an evaluation module built to characterize and validate the ADC32J45 - a dual-channel, 14-bit, 160 MSPS JESD204B subclass 1 analog-to-digital converter. It provides complete signal chain support including transformer-coupled analog inputs, onboard LMK04828 clock generation with SYSREF, USB-controlled SPI GUI, and HSMC interface to TSW14J56 for real-time data capture. The ADC32J45EVM enables full functional and performance testing of the ADC32J45 in system-relevant conditions.

Does the ADC32J45EVM include an onboard clock generator?

Yes, the ADC32J45EVM integrates the LMK04828 ultra-low-jitter clock generator to provide synchronized sampling clocks and deterministic SYSREF signals required for JESD204B subclass 1 operation. It accepts external clock input via J10 (LMK_CLKIN), generates internal clocks for the ADC32J45, and routes SYSREF to the ADC via J23/J24. Test points DCLKOUT6P/N and DCLKOUT7P/N allow probing of LMK outputs. This eliminates dependency on external clock sources during initial evaluation of the ADC32J45.

How is analog input coupling configured on the ADC32J45EVM?

The ADC32J45EVM supports both AC- and DC-coupled analog inputs. By default, it operates in AC-coupled mode using transformer inputs. To enable DC coupling, resistors R137, R216, R225, R227, R228, R218, R232, and R235 must be installed while removing R217, R258, R226, R219, R233, and R234 - per Table 7 in the SLAU579D user's guide. This configuration applies to channels B and C only, and requires no bottom-side amplifier modifications since THS4541RGT amplifiers are pre-installed on ADC3xJxxEVM variants like the ADC32J45EVM.

Which data capture platform is compatible with the ADC32J45EVM?

The ADC32J45EVM connects directly to the TSW14J56 high-speed data capture and pattern generation platform via its HSMC connector (J13). This interface supports full JESD204B lane streaming at up to 160 MSPS per channel, enabling real-time analysis of ADC32J45 output data in MATLAB, TI's High-Speed Data Converter Pro software, or custom FPGA-based receivers. The TSW14J56 provides clock synchronization, SYSREF alignment, and multi-lane deskew - essential for validating subclass 1 timing compliance of the ADC32J45.

What software is used to configure and control the ADC32J45EVM?

The ADC32J45EVM is controlled using Texas Instruments' ADC3xxxx_GUI_vxpx software, installed via the ADC3xxxx_Installer_vxpx package. The GUI provides tabbed register access - Common, ADC32Jxx, and LMK04828 tabs - enabling full configuration of ADC32J45 settings (gain, dither, chopper, test patterns) and LMK04828 clock parameters. Communication occurs over Mini-USB (J18) using a CPLD-based SPI bridge. No external JTAG or debug probes are required for basic evaluation of the ADC32J45.