Texas Instruments ADS8900BEVM-PDK

Overview

ADS8900BEVM-PDK from Texas Instruments is an evaluation module designed to accelerate development with the ADS8900B 18-bit, 1-MSPS SAR ADC. It provides a complete signal chain including OPA625 precision driver, reference buffer, and layout-optimized PCB for high-fidelity data acquisition. Key confirmed specs include 91.88 dB SNR, –110.8 dBc THD, 14.97 ENOB, and support for 5 V/3.3 V analog/digital supply configurations.

For engineers reviewing the ADS8900BEVM-PDK datasheet, ADS8900BEVM-PDK pinout, ADS8900BEVM-PDK application, or ADS8900BEVM-PDK equivalent, this page delivers verified hardware interface details, real-world performance metrics (SNR, THD, ENOB), power supply configuration options, OPA625 driver integration notes, and direct compatibility guidance with the ADS8900B ADC - all critical for rapid prototyping of precision industrial and test equipment.

Technical Context

The ADS8900BEVM-PDK implements a fully characterized, production-ready reference design centered on the ADS8900B 18-bit SAR ADC. It integrates the OPA625 dual-mode op amp as a low-noise, low-distortion input driver with selectable high-drive (120 MHz GBW, 115 V/µs slew) or low-power (1 MHz GBW, 270 µA IQ) operation - enabling dynamic trade-offs between speed and power in acquisition systems.

Signal integrity is maintained via dedicated 5 V and 3.3 V LDO-regulated supplies, buffered voltage reference path (VREF/4, VREF), and optimized PCB stack-up with ground plane isolation. The board supports both single-ended and differential input modes, includes configurable termination (1 kΩ resistors, 10 nF capacitor), and provides access to all ADC control signals (CONV, BUSY, CS) and digital I/O (SPI interface).

Key Specifications

Availability

ADS8900BEVM-PDK is available at Aetrix Electronics and suitable for precision test equipment, industrial process monitoring, and portable instrumentation requiring stable component supply, validated reference designs, and fast-turn evaluation hardware.

Supply support for ADS8900BEVM-PDK 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 and embedded processing technologies, with decades of expertise in precision data converters and signal chain solutions.

The ADS8900BEVM-PDK belongs to TI's high-precision SAR ADC evaluation platform family, engineered specifically to demonstrate optimal performance of the ADS8900B in real-world applications such as automated test equipment and high-end data loggers.

FAQ

What is the primary function of the ADS8900BEVM-PDK?

The ADS8900BEVM-PDK is an evaluation module for the ADS8900B 18-bit, 1-MSPS SAR ADC. It provides a fully assembled, tested PCB with integrated OPA625 driver, reference buffering, regulated power supplies, and SPI interface - enabling immediate characterization and system integration without custom layout. The ADS8900BEVM-PDK validates timing, noise, and linearity performance per the ADS8900B datasheet under real operating conditions.

Does the ADS8900BEVM-PDK support both single-ended and differential input configurations?

Yes, the ADS8900BEVM-PDK supports both configurations. It includes jumper-selectable input paths: single-ended mode uses the OPA625 noninverting input with 1 kΩ termination to ground, while differential mode routes signals through matched 1 kΩ resistors and the OPA625's ±IN terminals. The board's layout maintains impedance balance and minimizes skew, preserving the ADS8900B's specified 91.88 dB SNR in either mode.

What power supply requirements does the ADS8900BEVM-PDK have?

The ADS8900BEVM-PDK requires two independent DC supplies: 5 V for AVDD and reference circuitry (VREF, VREF/4), and 3.3 V for DVDD and digital I/O (IOVDD). These are internally regulated using low-noise LDOs. The ADS8900BEVM-PDK does not operate from a single supply - splitting analog and digital rails prevents switching noise from degrading the 91.88 dB SNR and –110.8 dBc THD performance of the ADS8900B.

How is the OPA625 configured on the ADS8900BEVM-PDK?

On the ADS8900BEVM-PDK, the OPA625 is configured in high-drive mode by default (MODE pin tied to V–), delivering 120 MHz GBW and 115 V/µs slew rate to meet the ADS8900B's 280 ns 16-bit settling requirement. Its inputs are AC-coupled via 10 nF capacitors, and outputs drive the ADS8900B's IN+ and IN– pins through 1 kΩ series resistors. The OPA625's rail-to-rail output and ±100 µV offset ensure full-scale utilization of the ADS8900B's 18-bit range.

Can the ADS8900BEVM-PDK be used with microcontrollers other than TI devices?

Yes, the ADS8900BEVM-PDK uses a standard 4-wire SPI interface (SCLK, SDI, SDO, CS) with asynchronous CONV and BUSY signals - compatible with any MCU or FPGA supporting SPI clock rates up to 50 MHz. Timing diagrams and register maps in the ADS8900B datasheet apply directly to the ADS8900BEVM-PDK. No TI-specific firmware or tools are required to operate the ADS8900BEVM-PDK with third-party host processors.