Texas Instruments ADS7884EVM

Overview

ADS7884EVM from Texas Instruments is an evaluation module designed for the ADS7884 - a 10-bit, 3-MSPS, single-channel, serial-interface SAR ADC in SOT23-6 packaging. It provides full analog signal conditioning with THS4031 buffer, onboard 2.5-V reference (REF3225), and configurable power supply options for ±6 V amplifier rails, +3.3 V/+5 V digital logic, and +5 V analog section.

For engineers reviewing the ADS7884EVM datasheet, ADS7884EVM pinout, ADS7884EVM application, or ADS7884EVM equivalent, this page delivers verified technical context, key specifications, supply support, manufacturer background, and targeted FAQs - all grounded in TI's SLAU166B User's Guide (Rev. B, Aug 2008) and confirmed EVM bill of materials.

Technical Context

The ADS7884EVM implements a complete test platform for high-speed ADC evaluation, featuring dual-supply THS4031 op-amps for low-distortion input buffering, C0G-type 680-pF sampling capacitor at the ADC input, and flexible reference routing via jumper W3 to select either onboard REF3225 or external voltage. Its analog input accepts signals up to 2.35–5.25 Vpp depending on VDD.

Digital interface uses standard SPI-compatible signals (CS, SCLK, SDO, FS) routed through Samtec P2 header (20-pin dual-row), with level translation provided by SN74LVC1G07 buffer (U6) to accommodate host processors operating at 1.8 V–5 V logic levels. Power delivery supports three independent domains: ±6 V for analog amplifiers, +5 V for ADC/reference, and +3.3 V/+5 V for digital buffers.

Key Specifications

Availability

ADS7884EVM is available at Aetrix Electronics and suitable for high-speed data acquisition systems, precision sensor interface development, and embedded ADC validation requiring stable component supply and documented reference design fidelity.

Supply support for ADS7884EVM 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 ICs, with over 90 years of innovation in signal chain and power management solutions.

The ADS7884EVM belongs to TI's precision data converter evaluation platform family, engineered to accelerate prototyping and characterization of high-speed SAR ADCs in portable, battery-powered, and industrial measurement applications.

FAQ

What is the primary function of the ADS7884EVM?

The ADS7884EVM is a dedicated evaluation module for the ADS7884 10-bit, 3-MSPS serial ADC. It enables full functional validation including analog input conditioning, reference configuration, digital interface timing, and power domain isolation - all implemented per TI's SLAU166B User's Guide. ADS7884EVM supports rapid integration testing without custom PCB development.

Which ADC device does the ADS7884EVM specifically support?

The ADS7884EVM is configured for the ADS7884SDBVT - a 10-bit, 3-MSPS, SOT23-6 packaged SAR ADC - as confirmed in the Bill of Materials (Table 7, item 29) and Device Comparison Summary (Table 1). While the board shares layout and circuitry with other ADS788xEVM variants, its default DUT (U5) is the ADS7884SDBVT.

Does the ADS7884EVM include onboard signal conditioning and reference?

Yes. The ADS7884EVM integrates a THS4031-based inverting unity-gain buffer (U2/U4), 680-pF C0G input capacitor (C20), and REF3225AIDBVT 2.5-V precision reference (U3). Jumper W3 allows selection between the onboard reference or an external source, and SJP1/SJP2 configure amplifier supply polarity - all documented in SLAU166B Section 3.

How is digital interfacing implemented on the ADS7884EVM?

Digital signals (CS, SCLK, SDO, FS) are routed to Samtec P2 - a 20-pin dual-row header - with pinout defined in Table 4 of SLAU166B. Level translation is handled by SN74LVC1G07 (U6) to ensure compatibility with 1.8 V–5 V host logic. No additional interface ICs are required for direct connection to DSP starter kits (e.g., TMS320C5000/C6000 DSKs) via the 5-6K interface card.

What power supply configurations does the ADS7884EVM support?

The ADS7884EVM accepts three independent supplies: ±6 V for THS4031 amplifiers (TP1/TP2), +5 V for ADC and reference (TP4), and +3.3 V or +5 V for digital buffers (TP3). Jumper W1 selects TP3 source voltage, while W4 routes either +5VCC or the W3-selected reference to the DUT's VDD pin - enabling precise supply control per ADS7884's 2.35–5.25 V operating range.