Texas Instruments ADC161S626BEB/NOPB

Overview

ADC161S626BEB/NOPB from Texas Instruments (formerly National Semiconductor) is a fully assembled evaluation board designed to accelerate prototyping and performance validation of the ADC161S626 16-bit, 50–250 kSPS differential-input SAR analog-to-digital converter. It supports both standalone logic analyzer-based testing and computer-mode operation via the WaveVision 4.1+ data capture board, with configurable reference (VREF), analog supply (VA), I/O supply (VIO), and clock sourcing.

For engineers reviewing the ADC161S626BEB/NOPB datasheet, ADC161S626BEB/NOPB pinout, ADC161S626BEB/NOPB application, or ADC161S626BEB/NOPB equivalent, this board enables rapid functional verification, dynamic parameter measurement (SNR, SINAD, THD, SFDR, ENOB), FFT-based spectral analysis, and flexible analog input conditioning (AC/DC-coupled, single-ended or differential) - all without custom PCB design.

Technical Context

The ADC161S626BEB/NOPB implements a complete signal chain interface for the ADC161S626 IC, including selectable 4.1 V reference (LM4132-4.1), on-board 800 kHz–4 MHz crystal oscillator (Y2), and external clock injection via TP15 with 51 Ω termination. It provides dual-path analog input conditioning through J8 (pins 3/5) with configurable biasing networks for AC-coupled (C21/C22 + R27–R33) or DC-coupled (R30/R34) operation.

SPI communication is exposed via J6 (14-pin header), with dedicated vias for CSB (via 5), SCLK (via 6), and DOUT (via 7), supporting both TTL- and CMOS-level signaling per the ADC161S626 specification. Power domains VA (+2.7 V to +5.5 V), VIO (+2.7 V to +5.5 V), and VREF (≤ VA) are independently configurable using jumpers JP11, JP13, and JP8 respectively.

Key Specifications

Availability

ADC161S626BEB/NOPB is available at Aetrix Electronics and suitable for precision sensor interface, industrial data acquisition, and embedded test equipment development requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for ADC161S626BEB/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 for design-in acceleration.

The ADC161S626BEB/NOPB belongs to TI's legacy evaluation kit line for SAR ADCs, engineered specifically to simplify validation of 16-bit, micro-power, serial-output converters in low-noise, mixed-signal applications.

FAQ

What is the primary function of the ADC161S626BEB/NOPB?

The ADC161S626BEB/NOPB is an evaluation board for the ADC161S626 16-bit SAR analog-to-digital converter. It provides a ready-to-use hardware platform to validate performance metrics-including SNR, SINAD, THD, SFDR, and ENOB-via standalone logic analyzer use or computer-mode integration with the WaveVision 4.1+ data capture system. The ADC161S626BEB/NOPB does not perform conversion itself; it hosts and interfaces the ADC161S626 IC.

Does ADC161S626BEB/NOPB include the ADC161S626 IC?

Yes, the ADC161S626BEB/NOPB includes the ADC161S626 IC (U7 on the schematic) pre-mounted and fully integrated. The board is shipped fully assembled per the Bill of Materials (page 14), with U7 explicitly listed as "ADC161S626" and no "Not Stuffed" designation - confirming functional presence of the target device.

Can ADC161S626BEB/NOPB operate without a PC or WaveVision board?

Yes, ADC161S626BEB/NOPB supports Stand-Alone Mode: users can drive CSB and SCLK directly via logic analyzer or pattern generator (at J6 pins 1 and 2 or vias 5 and 6), then monitor DOUT at J6 pin 5 or via 7. All power, reference, and clock configurations (JP8, JP11, JP12, JP13) remain fully functional without PC or WV board dependency.

What clock sources are supported by ADC161S626BEB/NOPB?

ADC161S626BEB/NOPB supports two clock sources: (1) on-board crystal oscillator Y2 (selected via JP12 pins 1–2), or (2) external CMOS-level clock injected at TP15 (selected via JP12 pins 2–3), terminated with 51 Ω (R45). The board accepts 800 kHz–4 MHz signals and routes clock to the ADC161S626 IC per its timing requirements.

How is analog input configured on ADC161S626BEB/NOPB?

Analog input is applied differentially across J8 pins 3 (+IN) and 5 (−IN). AC coupling uses C21/C22 (1 µF), with optional DC bias via R27–R33 (4.99 kΩ). DC coupling uses R30/R34 (20 Ω), with no capacitors. Single-ended operation is also supported by biasing −IN to VCM while driving +IN with a sinusoidal signal - all verified in Figures 2, 3, and 5 of the User's Guide.