Texas Instruments ADS8370EVM

Overview

ADS8370EVM from Texas Instruments is a dedicated evaluation board for the ADS8370 16-bit, 600-kSPS serial-interface analog-to-digital converter. It provides full signal conditioning-including THS4031-based input buffer, REF1004-2.5 onboard reference with 1.6× gain amplifier (U3), and SN74AHC1G125 digital buffers-enabling high-fidelity ac performance (SNR, THD, SFDR per datasheet) at up to 100-kHz input bandwidth.

For engineers reviewing the ADS8370EVM datasheet, ADS8370EVM pinout, ADS8370EVM application, or ADS8370EVM equivalent, this page delivers verified hardware configuration details, jumper-controlled reference selection (internal/REF1004-2.5/user-supplied), dual ±12-V analog supply support, and direct interface capability with TMS320C5000/C6000 DSKs via the 5-6K Interface Board.

Technical Context

The ADS8370EVM implements a complete analog front-end optimized for SAR ADC evaluation: THS4031 configured as unity-gain inverting buffer with 12-Ω series resistor and 6800-pF C0G ceramic sampling capacitor forms a charge-reservoir filter that suppresses kickback and high-frequency noise during sample/hold transitions. The reference path supports three modes-internal 4.096-V output (ADS8370 Pin 9), buffered REF1004-2.5 (U13 → U3 → 4.1 V), or external voltage applied at P1 Pin 20-with SJP1–SJP4 jumpers selecting routing and buffering.

Digital interfacing uses Samtec P1/P2 dual-row headers (20-pin each) for analog input and serial control signals (CS, SCLK, FS, SDO, BUSY, CONVST, PD, SB/2C). Power delivery accommodates ±12-V for op-amps (TP1/TP2), +5-V for analog section (TP4), and selectable +3.3-V/+5-V for digital buffers (J2 + W1 jumper), with all supplies decoupled using multilayer ceramic capacitors (0.1 µF, 1 µF, 2.2 µF, 47 µF) and ferrite beads (MMZ2012R601A).

Key Specifications

Availability

ADS8370EVM is available at Aetrix Electronics and suitable for high-speed data acquisition prototyping, precision ADC reference design validation, and embedded DSP interface development requiring stable component supply and documented TI evaluation hardware.

Supply support for ADS8370EVM 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, delivering analog, embedded processing, and silicon solutions for industrial, automotive, and communications markets.

The ADS8370EVM belongs to TI's precision data converter evaluation platform family, designed specifically to accelerate time-to-test for high-resolution SAR ADCs by providing validated analog front-end circuitry, flexible reference architecture, and plug-and-play digital connectivity.

FAQ

What is the primary function of the ADS8370EVM?

The ADS8370EVM is a Texas Instruments evaluation board built exclusively for the ADS8370 16-bit, 600-kSPS serial-output SAR ADC. Its primary function is to provide a fully characterized, ready-to-use hardware platform for evaluating ac performance (SNR, THD, SFDR), validating reference configurations (internal, REF1004-2.5, or external), and interfacing the ADS8370 with host processors or DSPs via its standardized serial control header (P2). The ADS8370EVM includes all necessary signal conditioning, power regulation, and layout best practices documented in SLAU161.

Which reference voltage options does the ADS8370EVM support?

The ADS8370EVM supports three distinct reference voltage configurations: (1) internal 4.096-V reference generated by the ADS8370 itself (Pin 9), enabled by shorting SJP4 Pins 1–2; (2) onboard REF1004-2.5 (U13) buffered through U3 to produce 4.1 V, selected via SJP1 Pins 1–2; and (3) user-supplied reference applied to P1 Pin 20, routed either directly (SJP2 Pins 2–3) or through the buffer (SJP2 Pins 1–2). All options are validated in the SLAU161 User's Guide and reflected in the bill of materials and schematic.

How is analog input connected and conditioned on the ADS8370EVM?

Analog input on the ADS8370EVM accepts signals at P1 Pin 2 (+IN) or SMA connector J1 center pin, with –IN shorted to AGND via factory-installed SJP7. Signal conditioning uses the THS4031 configured as a unity-gain inverting amplifier, followed by a 12-Ω series resistor and 6800-pF C0G ceramic capacitor to ground at the ADC input-forming a charge reservoir that absorbs kickback current and filters high-frequency noise during sampling. This topology is explicitly optimized for the ADS8370's ac specifications per Figure 1 and Section 2.1 of SLAU161.

What digital interface standards and connectors does the ADS8370EVM use?

The ADS8370EVM uses a 20-pin dual-row Samtec header (P2) to expose SPI-compatible digital signals: CS, SCLK, FS, SDO, BUSY, CONVST, PD, and SB/2C. These match the timing and electrical requirements of the ADS8370IBRHPT and are compatible with TI's 5-6K Interface Board for connection to TMS320C5000/C6000 DSKs. No level-shifting or protocol translation is required-the ADS8370EVM buffers all digital lines with SN74AHC1G125 devices (U3, U6–U12) to ensure clean, rail-to-rail logic levels.

Can the ADS8370EVM be used with both +3.3-V and +5-V digital supplies?

Yes-the ADS8370EVM supports both +3.3-V and +5-V digital supply voltages for the BVDD rail. This is controlled via jumper W1 on the board: shunt Pins 1–2 to select +5VD from power connector J2, or Pins 2–3 to select +3.3VD. The ADS8370IBRHPT datasheet (SLAS450) confirms operation across this range, and the EVM's SN74AHC1G125 buffers (U3, U6–U12) are rated for both voltages. Test points TP3 and J2 Pin 10 provide direct access for measurement or alternative supply injection.