Texas Instruments ADS7805EVM

Overview

ADS7805EVM from Texas Instruments is a full-featured evaluation module designed for the ADS7805 16-bit parallel-output SAR analog-to-digital converter, supporting ±10 V analog input range, internal or external reference selection, and 3-state parallel data interface with 16-bit output drivers. It enables rapid validation of high-precision data acquisition in industrial instrumentation and test equipment.

For engineers reviewing the ADS7805EVM datasheet, ADS7805EVM pinout, ADS7805EVM application, or ADS7805EVM equivalent, this page delivers verified hardware configuration details, jumper-controlled reference and interface modes, factory-default setup guidance, and direct integration paths with TI DSP starter kits and third-party interface boards like the 5-6K and HPA449.

Technical Context

The ADS7805EVM implements a modular analog front-end with selectable RC filtering, optional SOIC-8 op-amp (U8) for signal conditioning, and configurable reference routing via jumper W4 (internal REF3125, external source, or REFOUT bias). It supports both single-ended and bipolar operation when used with DAP Signal Conditioning Boards.

Digital control is implemented through SN74AHC138 address decoding (U5), dual SN74AHC1G32 logic gates (U4/U6) for R/C and /RD strobe management, and SN74ALVCH16245 level-shifting buffer (U3) configurable for 3.3 V or 5 V I/O. BUSY interrupt (/INTB) and BYTE-mode access (via W2) are hardware-supported for host processor synchronization.

Key Specifications

Availability

ADS7805EVM is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and embedded data acquisition systems requiring stable component supply, long-term design-in support, and seamless integration with TI C5000/C6000 DSP platforms.

Supply support for ADS7805EVM 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 leader specializing in analog, embedded processing, and digital signal technologies, with decades of leadership in precision data conversion and system-level evaluation tools.

The ADS7805EVM belongs to TI's precision data converter evaluation platform family, engineered specifically to accelerate prototyping and validation of high-resolution SAR ADCs in industrial, test & measurement, and real-time control applications.

FAQ

What is the primary function of the ADS7805EVM?

The ADS7805EVM is an evaluation module built to characterize and validate the ADS7805 16-bit SAR analog-to-digital converter. It provides complete analog signal conditioning, configurable reference routing, parallel digital interface buffering, and jumper-based control for conversion timing, byte access, and multi-board stacking - all centered around enabling rapid, repeatable testing of the ADS7805 in real-world signal chains.

Can the ADS7805EVM be used with the ADS8505 or ADS7804?

Yes - the ADS7805EVM is explicitly designed for interchangeability among three devices: ADS7805, ADS8505, and ADS7804. The U1 socket accepts any of these ICs; the ADS7804 requires only removal of the installed device and no board modification. All jumpers, connectors, and power routing remain fully functional across all three parts, as confirmed in the SLAU145 User's Guide Section 1 and Table 6.

How does the reference voltage configuration work on the ADS7805EVM?

The ADS7805EVM offers four reference options controlled by jumper W4: (1) default REFOUT bias (pins 7–8), (2) internal 2.5 V REF3125 (pins 5–6), (3) external reference applied to J1.20 (pins 1–2), or (4) REFOUT routed off-board (pins 3–4). Each mode directly routes the selected reference to the ADS7805's REF pin, enabling precise calibration, external AFE integration, or low-drift system-level referencing.

What host interfaces does the ADS7805EVM support out of the box?

The ADS7805EVM natively supports connection to TI's 5-6K Interface Board for C5000/C6000 DSP Starter Kits, as well as SoftBaugh's HPA449. Its J4 (32-pin header/socket) and J5 (10-pin digital control) connectors provide standard 0.1" pitch access to all digital signals, allowing direct interfacing with logic analyzers, pattern generators, or custom controllers without adapter hardware.

Is software provided with the ADS7805EVM?

No standalone evaluation software is bundled with the ADS7805EVM. However, TI provides verified code examples for interfacing the ADS7805EVM with TMS320 series DSPs - documented in application report SLAA229 and accessible via the ADS7805 product folder or email to [email protected]. Users must implement their own host-side firmware or leverage TI's C5000/C6000 code libraries.