Texas Instruments DAC37J82EVM

Overview

DAC37J82EVM from Texas Instruments is an evaluation module designed to characterize the DAC37J82 16-bit, 2.5-GSPS, JESD204B-compliant digital-to-analog converter. It integrates the LMK04828 ultra-low-jitter clock jitter cleaner, transformer-coupled SMA outputs (IOUTA–IOUTD), FMC connector for FPGA or TSW14J56 pattern generator interfacing, and USB-controlled GUI for full register access. Used in RF signal generation, wideband communications, and radar waveform synthesis.

For engineers reviewing the DAC37J82EVM datasheet, DAC37J82EVM pinout, DAC37J82EVM application, or DAC37J82EVM equivalent, this page delivers verified hardware configuration options, clocking modes (onboard VCXO, external reference, or clock distribution), JESD204B lane setup (1–8 lanes at up to 12.5 Gbps), interpolation control (up to 16×), and real-world test validation using HSDCPro and spectrum analysis.

Technical Context

The DAC37J82EVM implements a dual-loop clock architecture via the LMK04828: PLL1 locks to either the onboard 122.88 MHz VCXO or an external reference at CLKIN (J17), while PLL2 generates high-frequency DAC clocks (e.g., DCLKOUT2 at 2.4576 GHz) from its internal VCO. Clock outputs are distributed to both the DAC37J82 and FMC connector with configurable SYSREF alignment.

JESD204B link initialization uses the FMC interface (J16) for up to eight 12.5-Gbps SerDes lanes, with SYNCB routing and deterministic latency support. Analog outputs are AC-coupled via 1:1 transformers (J2, J8, J9, J11), providing single-ended signals with ~10 MHz low-frequency cutoff and 50-Ω impedance matching for lab instrumentation.

Key Specifications

Availability

DAC37J82EVM is available at Aetrix Electronics and suitable for RF transceiver development, 5G NR baseband prototyping, and wideband electronic warfare systems requiring stable component supply and full evaluation infrastructure.

Supply support for DAC37J82EVM 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-speed data converter technologies, with over 90 years of innovation in precision signal chain solutions.

The DAC37J82EVM belongs to TI's high-speed data converter evaluation platform family, engineered specifically to accelerate JESD204B-based DAC integration in demanding RF and communications applications.

FAQ

What is the primary purpose of the DAC37J82EVM?

The DAC37J82EVM is a Texas Instruments evaluation module built to fully assess the DAC37J82 16-bit, 2.5-GSPS digital-to-analog converter. It provides complete hardware infrastructure-including LMK04828 clocking, FMC connectivity, transformer-coupled analog outputs, and USB-controlled GUI-to validate JESD204B link integrity, spectral performance, timing alignment, and system-level integration before final design implementation. The DAC37J82EVM enables rapid characterization without custom PCB development.

Which DAC models does the DAC37J82EVM support beyond DAC37J82?

The DAC37J82EVM is part of the DAC3XJ8XEVM platform and natively supports the entire DAC3XJ8X family: DAC37J82, DAC37J84, DAC38J82, DAC38J84, DAC39J82, and DAC39J84. Each variant shares identical board-level interfaces, clocking architecture, and GUI control flow-only register configurations and interpolation settings differ per device. The DAC37J82EVM firmware and GUI v1.1+ recognize all six parts and auto-configure appropriate JESD204B parameters (L, M, F, K) and digital blocks accordingly.

How does the DAC37J82EVM handle clock synchronization for JESD204B subclass 1 operation?

The DAC37J82EVM ensures deterministic latency and multi-device synchronization via precise SYSREF handling: the onboard LMK04828 generates synchronized SYSREF pulses aligned to DACCLK edges, routed to both the DAC37J82 and FMC connector. The GUI's "Trigger LMK04828 SYSREF" function initiates a one-shot pulse, while the SYSREF and SYNC tab allows dynamic delay adjustment. This guarantees proper initial lane alignment and phase coherence across all JESD204B lanes-critical for coherent array and MIMO applications using the DAC37J82EVM.

Can the DAC37J82EVM operate without an external pattern generator like the TSW14J56?

Yes-the DAC37J82EVM can operate standalone using FPGA development kits with FMC-HPC/LPC connectors and JESD204B IP cores (e.g., Xilinx ZCU102 or Intel Arria 10 GX). The FMC interface (J16) provides all required signals: eight differential SerDes lanes, SYNCB, DACCLK, and SYSREF. Users must provide compatible HDL firmware and configure the DAC37J82 registers via SPI through the GUI or custom host software. The DAC37J82EVM does not require TSW14J56 but relies on a JESD204B-compliant data source for functional output.

What are the supported interpolation modes and maximum output rates achievable with the DAC37J82EVM?

The DAC37J82EVM supports interpolation factors of 1×, 2×, 4×, 8×, and 16× via the DAC37J82's integrated digital upconverter. With a 368.64 MSPS input data rate (standard WCDMA test vector), 4× interpolation yields a 1.47456 GSPS DAC output; 16× interpolation enables full 2.5 GSPS operation when paired with appropriate clocking (e.g., 2.4576 GHz DACCLK from LMK04828). All interpolation modes are selectable in the DAC3XJ8X GUI's Dig Block 1 tab and validated in the DAC37J82EVM Quick Start procedure.