Texas Instruments ADS6149EVM

Overview

ADS6149EVM from Texas Instruments is an evaluation module designed to characterize the ADS6149 14-bit, 250-MSPS analog-to-digital converter under controlled signal, clock, reference, and power conditions. It supports transformer-coupled or THS4509-amplified analog inputs, multiple clocking schemes (including external single-ended, onboard VCXO + CDCE72010 with crystal-filtered LVCMOS, or differential LVPECL), and dual LDO/switching power supply topologies.

For engineers reviewing the ADS6149EVM datasheet, ADS6149EVM pinout, ADS6149EVM application, or ADS6149EVM equivalent, this page delivers verified hardware configuration options, jumper-controlled operational modes, ADC SPI interface support, TSW1200 capture integration, and real-world test results for SNR, SFDR, and FFT performance across clock input variants.

Technical Context

The ADS6149EVM implements a modular signal chain architecture: analog input path offers transformer-coupled (J6) or THS4509-amplified (J8/J9/J11) configurations via surface-mount jumpers; clock path supports three distinct modes - direct SMA input (J19), crystal-filtered 245.76 MHz LVCMOS from CDCE72010 Y0 output, or differential LVPECL from Y1P/Y1N - all selectable via SJP4/SJP6/SJP7.

Power delivery includes three configurable options: (1) cascaded TPS5420D switching regulator + TPS79501 LDO (6–36 V input); (2) LDO-only (5.1–5.5 V input, default); and (3) isolated AVDD/DVDD measurement mode. All modes are jumper-defined (JP13–JP19), with on-board regulators generating 3.3 V (TPS79633) and 1.8 V (TPS79601) for ADC supplies.

Key Specifications

Availability

ADS6149EVM is available at Aetrix Electronics and suitable for high-speed data acquisition systems, radar receiver testing, communications transceiver validation, and wideband spectrum analysis requiring stable component supply and repeatable evaluation infrastructure.

Supply support for ADS6149EVM 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 markets.

The ADS6149EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate characterization and system integration of pipeline ADCs in demanding RF and IF sampling applications.

FAQ

What is the primary function of the ADS6149EVM?

The ADS6149EVM is a dedicated evaluation module for the ADS6149 14-bit, 250-MSPS analog-to-digital converter. It provides configurable analog input paths (transformer-coupled or THS4509-amplified), multiple clocking architectures (external, crystal-filtered LVCMOS, or differential LVPECL), and flexible power supply options to enable comprehensive performance validation - including SNR, SFDR, and FFT - under real-world signal chain conditions. The ADS6149EVM supports full register control via TI's ADC SPI software and integrates directly with the TSW1200 capture board.

Which ADC models does the ADS6149EVM support besides the ADS6149?

The ADS6149EVM is part of the multi-device ADS61x9/55xxEVM platform and supports the full ADS61x9 family (ADS6128, ADS6148, ADS6129, ADS6149, ADS61B29, ADS61B49) as well as ADS556x (ADS5560, ADS5562) and ADS55xx (ADS5517, ADS5525, ADS5527, ADS5545, ADS5546, ADS5547) converters. Jumper configurations (JP12, JP9, J1, J2, J3) must be adjusted per device datasheet requirements for parallel control, power sequencing, and interface compatibility. The ADS6149EVM's physical layout and signal routing are optimized for the ADS6149 but retain mechanical and electrical adaptability across the supported families.

How do I configure the ADS6149EVM for transformer-coupled analog input?

To configure the ADS6149EVM for transformer-coupled analog input, set SJP1 to 1–2, SJP2 to 1–2, SJP3 to no shunt, SJP5 to 1–2, and JP7 to 1–2 - matching the default shipped configuration. Apply a 0-V offset, –1-dBFS amplitude sine wave with 50-Ω source impedance to SMA connector J6. The signal passes through two 1:1 transformers (ADT4-1WT) for balanced conversion before reaching the ADS6149. Ensure J9 and J11 remain unconnected unless using the THS4509 amplifier path. This configuration is validated in Figure 7 of the SLWU061A user's guide and delivers optimal performance for high-bandwidth IF signals.

What clock sources are supported by the ADS6149EVM, and how are they selected?

The ADS6149EVM supports three clock input modes: (1) external single-ended 1.5-Vpp sine wave via J19 (default); (2) onboard 245.76 MHz crystal-filtered LVCMOS from CDCE72010 Y0 output; and (3) differential LVPECL from CDCE72010 Y1P/Y1N outputs. Selection is controlled by jumpers: SJP4 (clock source), SJP7 (positive clock path), and SJP6 (negative clock path). For Mode 2, set J18→1–2, SJP4→2–3, SJP7→3–4, SJP6→1–2; for Mode 3, set SJP7→5–6 and SJP6→2–3. The VCXO and crystal filter are not populated by default and must be added per application requirements.

Does the ADS6149EVM include SPI interface capability for register control?

Yes, the ADS6149EVM supports full SPI-based register control of the ADS6149 via TI's ADC SPI Control Software. To enable SPI mode, configure JP12 to open (not 1–2), JP11 to shorted (1–2), JP9 to open, JP15 to open, J2 to open, and J1 to open - disabling parallel control and enabling serial communication. The software provides GUI-driven access to ADS6149 registers (e.g., gain, offset, test modes) and integrates with the TSW1200 for synchronized capture and analysis. Register settings and bit definitions are documented in Table 8 of the SLWU061A user's guide.