Texas Instruments ADS4149EVM

Overview

ADS4149EVM from Texas Instruments is an evaluation module designed to characterize the ADS4149 14-bit, 250-MSPS analog-to-digital converter under configurable signal, clock, reference, and power supply conditions. It supports transformer-coupled single-ended analog input (J6), external or onboard CDCE72010-derived clocking (up to 245.76 MHz), and dual 1.8-V analog/digital supply generation via TPS62562 switching regulator or TPS79618 LDO.

For engineers reviewing the ADS4149EVM datasheet, ADS4149EVM pinout, ADS4149EVM application, or ADS4149EVM equivalent, this page details its configurable power architecture, LVDS output interface, jumper-based ADC control modes (parallel vs. SPI), and compatibility with TI's HSDC Pro and TSW1400 data capture platform.

Technical Context

The ADS4149EVM implements a modular, jumper-configurable architecture for evaluating high-speed ADC performance across multiple operating domains. Power delivery supports three distinct topologies: switching-regulator-based (TPS62562), LDO-based (TPS79618), or externally isolated 1.8-V supplies - each selectable via JP13, JP14, JP17, and JP19.

Clock routing includes direct SMA input (J19) to transformer-coupled ADC clock, or programmable CDCE72010-based generation (245.76 MHz LVCMOS or LVPECL) using factory-programmed EEPROM divide-by-4 configuration. Analog input path offers transformer-coupled (default) or THS4509 amplifier-assisted options, with discrete resistor-jumper selection (R94/R98/R97/R99) determining signal source and polarity routing.

Key Specifications

Availability

ADS4149EVM is available at Aetrix Electronics and suitable for high-speed data converter evaluation, RF receiver characterization, and wideband digitizer development requiring stable component supply and full documentation support.

Supply support for ADS4149EVM 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 ADS4149EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate validation of RF-sampling and IF-digitizing systems in communications infrastructure, test equipment, and radar applications.

FAQ

What is the primary function of the ADS4149EVM?

The ADS4149EVM is a dedicated evaluation module for the ADS4149 14-bit, 250-MSPS analog-to-digital converter. It provides configurable power, clock, analog input, and digital output circuitry to enable comprehensive performance testing - including SNR, SFDR, and ENOB - under real-world signal chain conditions. The ADS4149EVM does not operate as a standalone product but serves exclusively as a characterization platform for the ADS4149 IC.

Which ADC models does the ADS4149EVM support besides the ADS4149?

The ADS4149EVM is a shared platform supporting the entire ADS41xx family, including ADS4126, ADS4146, ADS4128, ADS4129, ADS41B29, ADS41B49, and ADS58B18. All share identical mechanical layout, power architecture, and jumper-based configuration logic. However, performance limits (e.g., sampling rate, input bandwidth) are determined by the specific ADC mounted - the ADS4149EVM itself imposes no functional constraints beyond those defined by the installed device.

How is clocking configured on the ADS4149EVM?

Clocking on the ADS4149EVM is configured via jumpers and surface-mount resistors. Default operation uses a 1.5-Vpp sine-wave applied to SMA connector J19, converted to differential AC-coupled clock for the ADS4149. Alternatively, the onboard CDCE72010 clock buffer (factory-programmed for ÷4) can generate 245.76-MHz LVCMOS (Y0) or LVPECL (Y1P/Y1N) outputs when enabled via JP4 and R107/R114. The VCXO and crystal filter are not pre-populated and must be added per application requirements.

What power supply options does the ADS4149EVM offer?

The ADS4149EVM supports three power configurations: (1) TPS62562 switching regulator (default, JP17/J19 = 1–2) for high-efficiency 1.8-V generation; (2) TPS79618 LDO (JP17/J19 = 2–3) for low-noise operation; or (3) externally supplied isolated 1.8-V AVDD/DVDD (JP13/J14 = 2–3). All require only a single 3.3-V input at J16, with voltage limits strictly enforced to prevent damage - maximum 3.6 V applied to J16.

Can the ADS4149EVM be used with the TSW1400 data capture board?

Yes, the ADS4149EVM is fully compatible with the TSW1400 high-speed data capture board via its 20-pin LVDS output header J10. When connected, the TSW1400 automatically terminates all LVDS pairs, eliminating need for external 100-Ω resistors. Data capture is controlled through TI's HSDC Pro software, which supports FFT analysis, single-tone tests, and register-level configuration of the ADS4149 - all validated in the ADS4149EVM User's Guide (SLWU067D).