Texas Instruments ADS8345EVM

Overview

ADS8345EVM from Texas Instruments is an evaluation module designed for the ADS8345 16-bit, 8-channel, 100-kHz SAR analog-to-digital converter. It integrates an OPA627AU op-amp for channel-0 signal conditioning, REF1004C-2.5 voltage reference, and SN74LVC1G07 buffer drivers. The board supports dual ±12-V analog supplies and single 2.7–5-V digital supply, with typical power dissipation of 8 mW at full throughput.

For engineers reviewing the ADS8345EVM datasheet, ADS8345EVM pinout, ADS8345EVM application, or ADS8345EVM equivalent, this page delivers verified hardware interface details, jumper-configurable analog/digital reference paths, synchronous serial interface access via P2, and channel-specific input routing - all critical for rapid ADC validation in data acquisition systems.

Technical Context

The ADS8345EVM implements a complete signal chain for the ADS8345EB IC: analog inputs are routed through configurable jumpers (W3 for CH0 op-amp path, W5 for onboard/external reference selection), while digital control signals (CS*, SCLK, SDI, SDO, BUSY) are exposed on 10-pin dual-row header P2. Power domains are isolated with dedicated AGND/DGND planes and ferrite bead filtering (FB1–FB3).

It supports flexible analog interfacing: P1 provides direct access to all eight ADC input channels (CH0–CH7), with CH0 optionally conditioned by the OPA627AU in noninverting configuration; reference voltage can be sourced either from the onboard REF1004C-2.5 or externally via P1.20; and shutdown control (SHDN*) is accessible for power management testing.

Key Specifications

Availability

ADS8345EVM is available at Aetrix Electronics and suitable for precision data acquisition, sensor interface validation, and industrial ADC qualification requiring stable component supply and documented TI reference design support.

Supply support for ADS8345EVM 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 system-on-chip solutions, with decades of leadership in data conversion and precision analog design.

The ADS8345EVM belongs to TI's Data Acquisition Products evaluation platform family, engineered to accelerate development of high-resolution measurement systems using their precision ADC portfolio.

FAQ

What is the primary function of the ADS8345EVM?

The ADS8345EVM is a dedicated evaluation module for the ADS8345EB 16-bit, 8-channel SAR ADC. It provides a fully assembled, tested hardware platform with signal conditioning, stable reference, and accessible digital interface to validate ADC performance, verify timing margins, and prototype data acquisition firmware - without requiring custom PCB design. The ADS8345EVM enables immediate functional testing of the ADS8345EB in real-world analog environments.

Which ADC does the ADS8345EVM evaluate?

The ADS8345EVM evaluates the ADS8345EB - a 16-bit, 8-channel, 100-kHz sampling SAR analog-to-digital converter manufactured by Texas Instruments. All analog routing, reference architecture, and digital interface layout on the ADS8345EVM are specifically optimized for the ADS8345EB's pinout, timing requirements, and electrical specifications as defined in its datasheet (SBAS177A).

Can the ADS8345EVM operate with a single 5-V supply?

No - the ADS8345EVM requires three separate supplies: dual ±12 V for the OPA627AU op-amps and REF1004C-2.5 reference, plus a 2.7–5-V digital supply for the ADS8345EB and buffer drivers. Applying only a 5-V supply will not power the analog signal chain and may result in undefined operation or damage. The ADS8345EVM User's Guide (SBAU082) explicitly specifies these supply requirements and warns against exceeding input voltage limits.

How is channel 0 signal conditioning implemented on the ADS8345EVM?

Channel 0 on the ADS8345EVM is routed through an OPA627AU operational amplifier configured in noninverting mode, providing low-noise buffering and gain flexibility. This path is enabled by jumper W3; removing W3 disables the op-amp and routes CH0 directly from P1.2. No other channels (CH1–CH7) include op-amp conditioning - they connect directly to the ADS8345EB inputs per the schematic and bill of materials in the ADS8345EVM User's Guide.

Is the ADS8345EVM FCC-certified for commercial deployment?

No - the ADS8345EVM is explicitly designated for engineering development and evaluation only. As stated in the EVM IMPORTANT NOTICE, it is not regulatory compliant (FCC, UL, CE, etc.), lacks end-product safety measures, and has not been tested for electromagnetic compatibility. Its open construction and unshielded layout mean the ADS8345EVM must remain in a controlled lab environment and cannot be deployed in certified end equipment.