Texas Instruments THS1031EVM

Overview

THS1031EVM from Texas Instruments is an evaluation module designed to characterize the THS1031 10-bit analog-to-digital converter under configurable signal, reference, and supply conditions-including ac/dc/transformer-coupled inputs, external clamp control via SMA J5, programmable register writes via DIP switches SW3/SW4, and buffered digital output via 40-pin header J4.

For engineers reviewing the THS1031EVM datasheet, THS1031EVM pinout, THS1031EVM application, or THS1031EVM equivalent, this module supports flexible ADC validation across input span modes (1 V_P–P/2 V_P–P), reference configurations (internal/external), clock sources (external SMA J2 or on-board oscillator), and power domains (independent 2.7–5.5 V analog/digital/reference rails).

Technical Context

The THS1031EVM implements a complete signal chain for the THS1031 ADC: analog input path with selectable coupling (J3), clamp control interface (J5), clock conditioning via SN74AHC14 inverter (U4), and reference generation using LT1004-1.2 shunt reference (D1) with adjustable REFTS/REFBS via Bourns 3296Y potentiometers P2/P3.

Digital interfacing includes SN74LVCC4245A transceivers (U6/U8/U9/U10) for level-shifted 10-bit parallel output to J4, register programming via two banks of DIP switches (SW3/SW4) and momentary push-button (SW1), and logic-level translation for CLK, OVR, and I/O lines across independent supply domains.

Key Specifications

Availability

THS1031EVM is available at Aetrix Electronics and suitable for high-speed data acquisition validation, precision ADC characterization, mixed-signal test bench development, and embedded system prototyping requiring stable component supply and full documentation support.

Supply support for THS1031EVM 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 high-performance analog solutions for industrial, automotive, and communications applications.

The THS1031EVM belongs to TI's precision data converter evaluation platform family, engineered to accelerate design-in of high-speed ADCs by providing validated signal integrity, configurable reference paths, and direct register-level device control.

FAQ

What is the primary purpose of the THS1031EVM?

The THS1031EVM is an evaluation module built specifically to assess the THS1031 10-bit, 25-MSPS analog-to-digital converter under real-world operating conditions. It enables engineers to validate performance across multiple input coupling methods, reference configurations, clock sources, and power supply combinations-without requiring custom PCB design. The THS1031EVM provides immediate access to all critical THS1031 pins and registers via standardized interfaces.

Does the THS1031EVM support both THS1030 and THS1031 devices?

Yes-the THS1031EVM is compatible with both THS1030 and THS1031 devices, as confirmed in the SLAU040 user's guide. However, certain features like external clamp control (via J5 and H5) and register programming (via SW3/SW4/SW1) are specific to the THS1031. Jumper settings differ between the two devices, and the THS1031EVM board layout accommodates both variants through configurable links and unpopulated components.

How is the THS1031 register programming implemented on the THS1031EVM?

The THS1031EVM uses two banks of DIP switches (SW3 and SW4) to set register bit values, and a momentary push-button (SW1) to trigger the write operation. Each DIP switch corresponds to a specific bit in the THS1031's clamp or control registers; position "ON" = logic 1. Pressing SW1 latches the switch states into the THS1031 registers. This method eliminates need for external programmers and allows rapid reconfiguration during testing of the THS1031.

What are the supported input signal configurations on the THS1031EVM?

The THS1031EVM supports three analog input coupling modes: ac-coupled (capacitor-coupled), dc-coupled (direct connection), and transformer-coupled (via Mini-Circuits TT1-6-X65). Input span modes include common-mode (VREF/2), external common-mode, and differential-each supporting 1 V_P–P or 2 V_P–P ranges. These configurations are selected via onboard jumpers (H1–H11, LINK1–LINK16) as documented in Table 4–1 of the THS1031EVM user's guide.

Can the THS1031EVM operate with different supply voltages for analog and digital domains?

Yes-the THS1031EVM provides fully independent power inputs: J6 for DRVDD/AVDD (2.7–5.5 V), J7 for reference circuit (2.7–5.5 V), J8 for analog section (2.7–5.5 V), and J9 for output buffers (5 V only). This separation allows precise domain-specific voltage control, enabling accurate evaluation of THS1031 performance under mismatched supply conditions while maintaining signal integrity and avoiding cross-domain noise coupling.