Texas Instruments ADS8380EVM

Overview

ADS8380EVM from Texas Instruments is a dedicated evaluation board for the ADS8380 18-bit, 600-kSPS serial-interface SAR analog-to-digital converter. It provides full signal conditioning with THS4031 input buffer, onboard REF1004-2.5 reference (gain-adjusted to 4.1 V), and SN74AHC1G125 digital buffers. Designed for high-fidelity ac performance testing at up to 100 kHz, it supports internal, onboard, or user-supplied reference selection via configurable jumpers.

For engineers reviewing the ADS8380EVM datasheet, ADS8380EVM pinout, ADS8380EVM application, or ADS8380EVM equivalent, this page delivers verified hardware configuration details, jumper-controlled reference routing options, dual-supply power interface specifications (±12 V, +5 V, +3.3 V), serial control connector mapping (CS/SCLK/FS/SDO/BUSY/CONVST), and EVM-specific layout practices for SAR ADC evaluation.

Technical Context

The ADS8380EVM implements a complete analog front-end optimized for the ADS8380's 18-bit, 600-kSPS SAR architecture: THS4031 configured as unity-gain inverting buffer drives the ADC's differential inputs, with 12-Ω series resistor and 6800-pF C0G ceramic sampling capacitor forming the anti-aliasing and charge reservoir network. The reference path supports three modes-internal (4.096 V), onboard (REF1004-2.5 buffered to 4.1 V), or external-selected via SJP1–SJP4 jumpers.

Digital interfacing uses Samtec P1/P2 dual-row headers for plug-and-play connection to prototype boards or DSP starter kits (e.g., TMS320C5000/C6000 DSK via 5-6K Interface Board). Power delivery accommodates ±12 V for op-amps, +5 V for analog section, and selectable +5 V/+3.3 V for digital buffers, with test points (TP1–TP4) and J2 power connector providing flexible sourcing options.

Key Specifications

Availability

ADS8380EVM is available at Aetrix Electronics and suitable for high-precision data acquisition systems, industrial sensor interface prototyping, and embedded DSP algorithm validation requiring stable component supply and traceable evaluation hardware.

Supply support for ADS8380EVM 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 digital signal processing technologies.

The ADS8380EVM belongs to TI's precision data converter evaluation platform family, designed specifically to accelerate development of high-resolution SAR ADC applications in test instrumentation, medical imaging, and automated test equipment.

FAQ

What is the primary function of the ADS8380EVM?

The ADS8380EVM is a fully assembled evaluation board built to characterize and validate the ADS8380 18-bit, 600-kSPS serial-output SAR ADC. It integrates all necessary analog signal conditioning (THS4031 buffer), reference circuitry (REF1004-2.5 with gain stage), digital buffering (SN74AHC1G125), and flexible power interfaces. Engineers use the ADS8380EVM to verify timing margins, noise performance, and system-level integration before committing to custom PCB design.

How does the ADS8380EVM support different reference voltage configurations?

The ADS8380EVM enables three distinct reference modes via solder-jumpers SJP1–SJP4: internal reference (4.096 V from ADS8380 pin 9), onboard REF1004-2.5 (buffered to 4.1 V by U3), or external reference applied to P1 pin 20. Factory default configures SJP4 shorted to route internal reference to REFIN. Users can reconfigure jumpers without component replacement, allowing direct comparison of reference sources on the same board.

Which digital interface signals are accessible on the ADS8380EVM's P2 connector?

The ADS8380EVM exposes all critical serial control signals on 20-pin P2 header per Table 3 in SLAU146: CS (P2.1), SB/2C (P2.2), SCLK (P2.3), DGND (P2.4), FS (P2.7), SDO (P2.13), BUSY (P2.15), CONVST (P2.17), PD (P2.19), and associated grounds. These match the ADS8380's native serial protocol, enabling direct connection to FPGAs, microcontrollers, or TI's 5-6K Interface Board for DSP-based acquisition.

What power supply requirements must be met to operate the ADS8380EVM?

The ADS8380EVM requires three independent supplies: ±12 V dc for the THS4031 and OPA132 op-amps (via TP1/TP2 or J2 pins 1/2), +5 V dc for the analog section including ADS8380 and reference circuitry (via TP4 or J2 pin 3), and either +5 V or +3.3 V for digital buffers (via TP3 or J2 pins 9/10, selected by W1 jumper). All voltages must be clean and well-decoupled to maintain 18-bit performance.

Can the ADS8380EVM be used as a reference design for custom PCBs?

Yes-the ADS8380EVM serves explicitly as a reference design per Section 5.1 of SLAU146. Its schematic (Section 9), bill of materials (Table 7), and 4-layer stack-up (Figures 2–5) provide proven layout practices for high-speed SAR ADCs: guard rings around analog inputs, separate analog/digital ground planes, localized decoupling (e.g., 0.1 µF/2.2 µF near U5), and C0G capacitor selection for critical signal paths. TI confirms this implementation meets ADS8380's ac specs (SNR, THD, SFDR) when used as specified.