Texas Instruments ADS61B49EVM

Overview

ADS61B49EVM from Texas Instruments is an evaluation module designed to characterize the ADS61B49 14-bit, 250-MSPS analog-to-digital converter under configurable clock, analog input, power supply, and digital interface conditions. It supports transformer-coupled or THS4509-amplified analog inputs, multiple clock sources (external SMA, onboard VCXO + CDCE72010), and dual power architectures (LDO-only or switching + LDO). The EVM enables high-fidelity ADC performance validation in RF receiver, communications test, and wideband data acquisition systems.

For engineers reviewing the ADS61B49EVM datasheet, ADS61B49EVM pinout, ADS61B49EVM application, or ADS61B49EVM equivalent, this page details its configurable signal chain architecture, jumper-based mode selection (parallel vs. SPI control), LVDS digital output interface, on-board clock conditioning with crystal filter or LVPECL options, and support for current consumption measurement via isolated AVDD/DVDD rails.

Technical Context

The ADS61B49EVM implements a modular signal path: analog input is selectable between direct transformer coupling (J6) or THS4509 differential amplification (J8/J9/J11); clocking supports three modes-direct external single-ended (J19), filtered CMOS output from CDCE72010 (Y0 + 245.76 MHz crystal filter), or differential LVPECL (Y1P/Y1N). Power delivery includes three configurations: LDO-only (5.1–5.5 V at J7), cascaded TPS5420D + TPS79501 (6–36 V), or isolated AVDD/DVDD for current measurement.

Digital interfacing uses LVDS outputs routed to J10, compatible with TI's TSW1200 capture board. Control is implemented via physical jumpers (e.g., JP12 for parallel mode, JP11/JP9 for SPI, SJP4/SJP7 for clock routing) rather than embedded firmware-no microcontroller or onboard processor is present. All configuration changes require manual shunt placement per Table 1 and Tables 2–7 in SLWU061A.

Key Specifications

Availability

ADS61B49EVM is available at Aetrix Electronics and suitable for RF receiver development, high-speed data acquisition system validation, and communications test equipment prototyping requiring stable component supply and full-spectrum ADC characterization capability.

Supply support for ADS61B49EVM 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, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The ADS61B49EVM belongs to TI's high-speed data converter evaluation platform family, engineered specifically to accelerate design-in of pipeline ADCs in demanding wideband applications such as radar, spectrum analyzers, and software-defined radio.

FAQ

What is the primary function of the ADS61B49EVM?

The ADS61B49EVM is a hardware evaluation platform for the ADS61B49 14-bit, 250-MSPS analog-to-digital converter. It provides configurable analog input paths (transformer or THS4509 amplifier), multiple clocking schemes (external, filtered CMOS, or LVPECL), and flexible power delivery to validate ADC performance across real-world signal, timing, and supply conditions. The ADS61B49EVM does not contain the ADS61B49 IC itself-it is a carrier board designed to host and exercise that device.

Does the ADS61B49EVM include the ADS61B49 IC pre-mounted?

No-the ADS61B49EVM is a bare evaluation board intended for use with the ADS61B49 IC, which must be separately sourced and mounted by the user. The board layout, footprint, and signal integrity design are optimized for the ADS61B49 package and electrical requirements, but the IC is not included with the ADS61B49EVM shipment.

Can the ADS61B49EVM support SPI-based register configuration of the ADS61B49?

Yes-the ADS61B49EVM supports SPI communication with the ADS61B49 via dedicated jumpers: JP11 (SDA), JP9 (SEN), J1 (SEN), and J2 (DFS) must be configured per Section 1.2 and Table 1 of SLWU061A. When JP12 is opened and JP11/JP9 are closed, the board routes SPI signals from an external host controller to the ADS61B49's serial interface pins, enabling full register-level control of sampling mode, output format, and power-down states.

What clock sources are supported on the ADS61B49EVM?

The ADS61B49EVM supports three distinct clock configurations: (1) direct external single-ended clock applied to SMA connector J19; (2) 245.76-MHz filtered CMOS clock from CDCE72010 Y0 output passed through an onboard crystal filter; and (3) differential LVPECL clock from CDCE72010 Y1P/Y1N outputs. Selection is controlled by surface-mount jumpers SJP4, SJP6, and SJP7 as documented in Tables 4 and 5 of SLWU061A.

Is the CDCE72010 clock buffer pre-programmed on the ADS61B49EVM?

Yes-the CDCE72010 on the ADS61B49EVM is factory-programmed with EEPROM settings for a fixed ÷4 frequency division ratio. When supplied with a 20-MHz reference clock at J19, it generates a 245.76-MHz output on Y0 (CMOS) and Y1P/Y1N (LVPECL). No reprogramming is required to use the onboard clock generation feature; configuration is purely jumper-selectable per the user's guide.