Texas Instruments ADS2807-EVM

Overview

ADS2807-EVM from Texas Instruments is an evaluation module designed exclusively for the ADS2807 - a 12-bit, dual-channel, 50-MSPS analog-to-digital converter. It provides transformer-coupled single-ended AC input, selectable 2V_pp/3V_pp input range, internal/external reference support, and isolated CMOS-buffered digital outputs. The board enables rapid performance validation in high-speed data acquisition systems.

For engineers reviewing the ADS2807-EVM datasheet, ADS2807-EVM pinout, ADS2807-EVM application, or ADS2807-EVM equivalent, this module serves as a turnkey platform to characterize ADS2807 timing accuracy, SNR at 50 MSPS, differential input interface behavior, and over-range detection response under real-world clock jitter conditions.

Technical Context

The ADS2807-EVM implements a fixed hardware configuration optimized for evaluating the ADS2807Y (64-pin PQFP) ADC. It uses two Mini-Circuits T1-1T RF transformers to convert single-ended inputs at J5/J6 into differential signals applied to the ADS2807's IN_A/IN_B and /IN_A/ /IN_B pins. Clock is supplied externally via SMA connector J4 with 50Ω termination.

Reference selection is controlled by jumpers JP4–JP8: internal reference mode is default; external reference requires disconnecting JP4 and connecting JP5–JP8. Power is distributed across three +5V rails (+5ADUT, +5DDUT, +5VD) and two +3V digital output driver rails (+3DRVA, +3DRVB), with SN74ALVCH16244 buffers isolating the 12-bit parallel outputs.

Key Specifications

Availability

ADS2807-EVM is available at Aetrix Electronics and suitable for high-speed ADC evaluation, RF receiver prototyping, and communications test equipment development requiring stable component supply and documented TI reference design traceability.

Supply support for ADS2807-EVM 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, specializing in analog, embedded processing, and high-performance data conversion technologies.

The ADS2807-EVM belongs to TI's precision high-speed data converter evaluation platform family, engineered to accelerate validation of dual-channel, 12-bit ADCs in undersampling and wideband communication applications.

FAQ

What is the primary function of the ADS2807-EVM?

The ADS2807-EVM is a dedicated evaluation module for the ADS2807Y 12-bit, 50-MSPS dual-channel ADC. It provides a complete signal chain - including transformer-coupled input, configurable reference, clock interface, and buffered digital output - enabling engineers to measure key performance metrics such as SNR, SFDR, and ENOB without custom PCB design. The ADS2807-EVM does not operate standalone; it requires connection to host logic for data capture.

Does the ADS2807-EVM support both ADS2806 and ADS2807 devices?

Yes, the ADS2807-EVM is compatible with both the ADS2806 (32-MSPS) and ADS2807 (50-MSPS), as confirmed in the SBAU075A user guide. However, the board's layout, power routing, and buffer selection are optimized for the ADS2807Y variant installed as U1. When using ADS2806, clock timing margins and jitter sensitivity differ, and users must verify compliance with that device's specific AC specifications.

What input configurations does the ADS2807-EVM support?

The ADS2807-EVM accepts only single-ended AC-coupled analog inputs via J5 (Channel A) and J6 (Channel B), converted to differential signals by on-board T1-1T transformers. Input range is user-selectable between 2V_pp and 3V_pp using jumper J1. DC coupling, differential input direct drive, or baseband DC-offset calibration are not supported by the ADS2807-EVM hardware.

How is clock signal applied to the ADS2807-EVM?

Clock is supplied externally to the ADS2807-EVM through SMA connector J4, which presents a 50Ω input impedance. The clock must exhibit low phase jitter to preserve ADS2807 performance - especially critical for undersampling applications. No on-board clock generation or multiplication is provided; the ADS2807-EVM relies entirely on a clean external source synchronized to the target system's timing requirements.

Can the ADS2807-EVM operate with +3V digital output levels?

The ADS2807-EVM's default output buffers (SN74ALVCH16244) are +5V-tolerant and require +5VD supply. While the ADS2807 itself supports +3V digital output drivers (DRV), the ADS2807-EVM does not ship with +3V-compatible buffers installed. To achieve +3V logic levels, users must replace U2/U3 with SN74ALB16244DGGR per the user guide - a hardware modification not preconfigured on the board.