Texas Instruments ADC122S625EB/NOPB

Overview

ADC122S625EB/NOPB from National Semiconductor is an evaluation board designed specifically for the ADC122S625 dual 12-bit, simultaneous-sampling analog-to-digital converter. It supports sampling rates from 50 kSPS to 200 kSPS (up to 500 kSPS per channel), features SPI digital interface, dual differential analog inputs (A and B), and on-board 2.5V reference (LM4132-2.5) - enabling rapid performance validation in test and development environments.

For engineers reviewing the ADC122S625EB/NOPB datasheet, ADC122S625EB/NOPB pinout, ADC122S625EB/NOPB application, or ADC122S625EB/NOPB equivalent, this board provides ready-to-use hardware for evaluating SNR (71.9 dB), SINAD (71.6 dB), THD (–82.8 dBc), ENOB (11.6 bits), and FFT-based dynamic performance of the ADC122S625 under real-world signal conditions using WaveVision 4 software.

Technical Context

The ADC122S625EB/NOPB implements a complete signal chain for the ADC122S625 IC, including configurable differential analog input paths (J3 header), selectable clock sources (on-board 4 MHz crystal Y2 or external CLK_IN at TP15), and flexible reference selection (JP8 for 2.5V or VA). Power is supplied via +4.5V to +5.5V at TP12 with typical current draw of 9–11 mA.

It supports two operational modes: Stand-Alone mode (SPI signals accessible at J6/VIA5–VIA7 for logic analyzer use) and Computer mode (direct connection to National's WV4 Data Capture Board via J6–J7 interface), enabling both manual timing analysis and automated waveform capture, FFT, histogram, and dynamic parameter reporting in WaveVision 4.

Key Specifications

Availability

ADC122S625EB/NOPB is available at Aetrix Electronics and suitable for precision data acquisition, sensor interface validation, and mixed-signal design verification requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADC122S625EB/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

National Semiconductor was a U.S.-based analog and mixed-signal semiconductor company, acquired by Texas Instruments in 2011, known for high-performance data converters, power management, and interface solutions.

The ADC122S625EB/NOPB belongs to National's evaluation kit product line, purpose-built to accelerate design-in of the ADC122S625 for applications demanding simultaneous dual-channel sampling, low THD, and high-resolution digitization of analog sensor or instrumentation signals.

FAQ

What is the primary function of the ADC122S625EB/NOPB?

The ADC122S625EB/NOPB is a dedicated evaluation board for the ADC122S625 dual 12-bit simultaneous-sampling analog-to-digital converter. Its primary function is to provide a fully assembled, test-ready platform for validating dynamic performance metrics-including SNR (71.9 dB), SINAD (71.6 dB), THD (–82.8 dBc), and ENOB (11.6 bits)-using either standalone logic analyzers or TI's WaveVision 4 software with the WV4 Data Capture Board.

Does the ADC122S625EB/NOPB include the ADC122S625 IC?

Yes, the ADC122S625EB/NOPB includes the ADC122S625 IC (U5) mounted in an MSOP-10 package on the board. The IC is pre-soldered and fully integrated into the signal chain, with dedicated analog input headers (J3), SPI interface access points (J6, VIA5–VIA7), and configurable reference and clock circuitry - enabling immediate functional evaluation without component-level assembly.

Can the ADC122S625EB/NOPB operate without connecting to a PC?

Yes, the ADC122S625EB/NOPB supports Stand-Alone mode: remove Y2 oscillator and JP12 jumper, then drive CSB and SCLK directly at J6 or vias VIA5/VIA6 while monitoring DOUT at VIA7 or J6 pin 5 using a logic analyzer. This mode requires no PC or WaveVision software and is intended for timing analysis, protocol debugging, or integration into custom test fixtures.

What software is required to use the ADC122S625EB/NOPB in Computer mode?

WaveVision 4 software version 4.4 or higher is required to use the ADC122S625EB/NOPB in Computer mode. It must be run on Microsoft Windows and used with National Semiconductor's WV4 Data Capture Board (WAVEVSN BRD 4.1+). The software captures digitized samples, performs real-time FFT analysis, and reports key dynamic parameters (SINAD, SNR, THD, SFDR, ENOB) - all validated for the ADC122S625EB/NOPB configuration.

How is the reference voltage configured on the ADC122S625EB/NOPB?

The reference voltage on the ADC122S625EB/NOPB is selected via jumper JP8: shorting pins 2–3 selects the on-board 2.5V LM4132-2.5 reference; shorting pins 1–2 selects VA (analog supply) as VREF; removing the jumper allows external VREF injection at TP11. The recommended VREF range is 1.0V to VA, and the board supports differential input ranges of ±VREF for optimal ADC122S625 performance.