Texas Instruments ADC128S022EVAL/NOPB

Overview

ADC128S022EVAL/NOPB from Texas Instruments (formerly National Semiconductor) is an evaluation board designed to accelerate prototyping and performance validation of the ADC128S022 - an 8-channel, 12-bit, low-power serial-output SAR analog-to-digital converter operating at up to 200 kSPS. It supports both stand-alone testing with logic analyzers and computer-based acquisition via the WaveVision4 software and WV4 Data Capture Board. The board features dual BNC analog inputs (INA/INB), configurable channel routing, AC/DC coupling options, and flexible clocking (onboard 16 MHz oscillator or external source).

For engineers reviewing the ADC128S022EVAL/NOPB datasheet, ADC128S022EVAL/NOPB pinout, ADC128S022EVAL/NOPB application, or ADC128S022EVAL/NOPB equivalent, this evaluation kit enables rapid functional verification, dynamic parameter measurement (SNR, SINAD, THD, SFDR, ENOB), and interface timing validation for industrial sensor data acquisition, multichannel monitoring systems, and embedded test instrumentation.

Technical Context

The ADC128S022EVAL/NOPB implements a complete hardware interface for the ADC128S022 IC, including configurable analog input conditioning (AC/DC coupling, 50 Ω impedance, ±0.05 V to VA–0.05 V range), programmable channel selection via DIP switches and jumpers, and dual clocking modes (internal 16 MHz crystal or external 800 kHz–3.2 MHz square wave). Power rails VA (2.7–5.25 V), VD (2.7 V to VA), and 3.3 V are independently accessible and jumper-configurable.

It integrates SPI-compatible digital I/O (CSB, SCLK, DIN, DOUT) on header J3 and test points (TP15), supports firmware-driven acquisition via WaveVision4 v4.2+, and includes on-board EEPROM (U2, 24C02) for configuration storage in computer mode. All analog and digital grounds are segregated with dedicated AGND planes per schematic layout.

Key Specifications

Availability

ADC128S022EVAL/NOPB is available at Aetrix Electronics and suitable for industrial sensor interfacing, multichannel data logging, and embedded ADC validation requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADC128S022EVAL/NOPB 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 acquired National Semiconductor in 2011 and maintains its precision data converter portfolio, including legacy evaluation platforms like the ADC128S022EVAL/NOPB, under full technical and supply chain support.

This evaluation board belongs to TI's legacy ADC evaluation kit family targeting low-power, multichannel SAR converters; it was engineered specifically to simplify design-in of the ADC128S022 in sensor signal chains, process monitoring, and portable instrumentation.

FAQ

What is the primary function of the ADC128S022EVAL/NOPB?

The ADC128S022EVAL/NOPB is a dedicated evaluation board for the ADC128S022 12-bit, 8-channel SAR ADC. It provides hardware infrastructure-including dual BNC analog inputs, jumper-configurable channel routing, SPI interface headers, and clocking options-to enable functional validation, dynamic performance testing (e.g., SNR, THD), and firmware integration without custom PCB design. ADC128S022EVAL/NOPB does not contain the ADC IC itself as a replaceable component; U1 is populated with the ADC128S022.

Does the ADC128S022EVAL/NOPB include the ADC128S022 IC?

Yes, the ADC128S022EVAL/NOPB comes fully assembled with the ADC128S022 IC (U1) pre-mounted in a TSSOP-16 package. The board is not a bare PCB; it is a ready-to-use evaluation platform where the ADC128S022 is soldered and tested per National Semiconductor's original design. No user replacement or socketing of the ADC is required or supported.

Which software is required to operate the ADC128S022EVAL/NOPB in computer mode?

WaveVision4 software version 4.2 or later is mandatory for computer-mode operation of the ADC128S022EVAL/NOPB. It must be used in conjunction with the WV4 Data Capture Board (order number WAVEVSN BRD 4.0) and the 14-pin ribbon cable (WV4ADCIFCABLE). The software runs on Microsoft Windows™ and performs real-time waveform capture, FFT analysis (yielding SNR, SINAD, THD, SFDR, ENOB), and histogram generation directly from ADC128S022EVAL/NOPB digitized data.

Can the ADC128S022EVAL/NOPB be used without the WV4 board?

Yes - the ADC128S022EVAL/NOPB supports stand-alone mode using external test equipment. Users can drive CSB, SCLK, and DIN signals via header J3 with a pattern generator or microcontroller, monitor DOUT at TP15 or J3, and capture output with a logic analyzer. No WV4 board or WaveVision4 software is needed in this configuration, though post-processing requires third-party tools.

What are the analog input coupling options on the ADC128S022EVAL/NOPB?

The ADC128S022EVAL/NOPB provides independent AC/DC coupling control for both INA (J2) and INB (J4) inputs via JP1 and JP3 jumpers. For DC coupling, place jumpers across pins 1–2; for AC coupling, use pins 3–4 (JP1) or 2–3 (JP3). INA may also be grounded via pins 5–6 of JP1. These settings directly configure the input path to match signal source characteristics - critical for accurate DC-level or AC-spectral measurements using the ADC128S022.