Texas Instruments ADC141S626EB/NOPB

Overview

ADC141S626EB/NOPB from Texas Instruments (formerly National Semiconductor) is an evaluation board designed to accelerate prototyping and performance validation of the ADC141S626 - a 14-bit, differential-input, micro-power SAR analog-to-digital converter operating at 50 kSPS to 250 kSPS. It supports both stand-alone logic analyzer-based testing and computer-mode operation via the WaveVision 4.1+ data capture board and software, with configurable reference, clock, analog supply (VA), and I/O supply (VIO) rails.

For engineers reviewing the ADC141S626EB/NOPB datasheet, ADC141S626EB/NOPB pinout, ADC141S626EB/NOPB application, or ADC141S626EB/NOPB equivalent, this board enables rapid functional verification, dynamic performance analysis (SNR, SINAD, THD, SFDR, ENOB), FFT-based spectral assessment, and flexible analog input conditioning (AC/DC-coupled, single-ended or differential) for sensor, industrial monitoring, and precision data acquisition systems.

Technical Context

The ADC141S626EB/NOPB implements a complete signal chain interface for the ADC141S626 IC, featuring jumper-selectable analog voltage (VA: +2.7 V to +5.5 V), reference voltage (VREF: VA or 4.1 V LM4132-4.1), I/O supply (VIO: VA or external), and clock source (on-board 800 kHz–4 MHz crystal oscillator Y2 or external CMOS signal at TP15). It provides dual-mode operation: stand-alone (via J6 test points for CSB, SCLK, DOUT) and computer mode (via 14-pin WV4S connector J6 to WaveVision board).

Hardware design includes configurable differential analog input (J8 pins 3 & 5), ac-coupling (C21/C22 + bias resistors R27–R33) or dc-coupling (R30/R34), 51 Ω terminated clock input (R45), and on-board 3.3 V regulation. All critical signals - including VA, VIO, VREF, CLK_IN, and AGND - are accessible via labeled test points (TP11–TP23) for probing and validation.

Key Specifications

Availability

ADC141S626EB/NOPB is available at Aetrix Electronics and suitable for precision sensor interfacing, industrial process monitoring, and laboratory-grade data acquisition requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADC141S626EB/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 analog portfolio, including high-performance data converters and evaluation platforms. TI is a global leader in analog and embedded processing technologies.

The ADC141S626EB/NOPB belongs to TI's precision ADC evaluation kit family, engineered specifically to de-risk design-in of the ADC141S626 for low-power, high-resolution measurement applications in industrial automation, test equipment, and environmental sensing.

FAQ

What is the primary function of the ADC141S626EB/NOPB?

The ADC141S626EB/NOPB is an evaluation board for the ADC141S626 14-bit SAR ADC. Its primary function is to enable hardware validation, dynamic performance characterization (e.g., SNR, THD, ENOB), and interface development for the ADC141S626 IC. It is not a production-ready subsystem but a design-assist tool supporting both stand-alone and WaveVision-connected operation modes.

Does the ADC141S626EB/NOPB include the ADC141S626 IC?

Yes, the ADC141S626EB/NOPB includes the ADC141S626 IC (U7 on the schematic) as the core device under test. The board is fully assembled per the Bill of Materials (page 14), with U7 populated and soldered, enabling immediate evaluation without component-level assembly.

Can the ADC141S626EB/NOPB operate without a WaveVision board?

Yes, the ADC141S626EB/NOPB supports stand-alone mode using standard test equipment. Users can drive CSB and SCLK via J6 pins 1 and 2 (or vias 5 and 6), monitor DOUT at J6 pin 5 (or via 7), and configure power/reference settings manually using jumpers JP8, JP11, JP12, and JP13 - no WaveVision board required.

What clock sources does the ADC141S626EB/NOPB support?

The ADC141S626EB/NOPB supports two clock sources: (1) on-board crystal oscillator Y2 (800 kHz–4 MHz range), selected by shorting JP12 pins 1–2; or (2) external CMOS clock applied to TP15 (3.3 V logic levels, 51 Ω terminated), selected by shorting JP12 pins 2–3. Y2 must be removed when using TP15 to avoid noise coupling.

Is the ADC141S626EB/NOPB RoHS compliant?

Yes, the ADC141S626EB/NOPB is RoHS compliant, as confirmed in the title block of the Evaluation Board User's Guide (Rev 1.2, December 3, 2007). The "/NOPB" suffix in the part number explicitly denotes lead-free (Pb-free) packaging per RoHS Directive 2002/95/EC.