Texas Instruments ADC122S051EVAL

Overview

ADC122S051EVAL from Texas Instruments is an evaluation board designed to accelerate development and validation of the ADC122S051 - a 12-bit, dual-channel, 200–500 ksps successive-approximation analog-to-digital converter in an 8-lead MSOP package. It supports SPI/QSPI/MICROWIRE-compatible serial interface operation, operates from 2.7V to 5.25V, delivers 72.5 dB SNR (typ), and features programmable channel selection (IN1/IN2) and power-down mode consuming only 0.14 µW at 3V. Engineers use it for rapid prototyping in portable instrumentation and remote data acquisition systems.

For engineers reviewing the ADC122S051EVAL datasheet, ADC122S051EVAL pinout, ADC122S051EVAL application, or ADC122S051EVAL equivalent, this page provides verified hardware configuration details, supported interface timing, on-board signal conditioning, jumper-selectable reference options, and direct compatibility with the ADC122S051's full electrical specification range - including sample rates up to 500 ksps, 12-bit resolution, and industrial temperature operation (−40°C to +85°C).

Technical Context

The ADC122S051EVAL implements a complete test platform for the ADC122S051 IC, featuring buffered analog inputs, configurable single-ended or differential input paths via jumpers, on-board 3.3V LDO regulator, and selectable external or internal supply-derived reference. It routes all critical digital signals (CS, SCLK, DIN, DOUT) to a standard 10-pin header compatible with TI's MSP430 and C2000 launchpads and common logic analyzers.

Board-level design follows TI's recommended layout practices: dedicated analog/digital ground planes, localized 1 µF + 0.1 µF VA decoupling at the ADC footprint, low-impedance analog trace routing, and series 100 Ω resistors on digital outputs to suppress ground bounce - directly enabling accurate measurement of dynamic performance metrics including SNR (72.5 dB), THD (−84 dB), and SFDR (86 dB).

Key Specifications

Availability

ADC122S051EVAL is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor nodes, industrial process monitoring, and embedded data logging applications requiring stable component supply and fast time-to-validation.

Supply support for ADC122S051EVAL 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The ADC122S051EVAL belongs to TI's precision data acquisition evaluation platform family, engineered specifically to simplify characterization and integration of low-power, multi-channel SAR ADCs into space- and power-constrained systems.

FAQ

What is the primary purpose of the ADC122S051EVAL?

The ADC122S051EVAL is a dedicated evaluation board for the ADC122S051 12-bit dual-channel SAR ADC. It provides a fully assembled, tested platform with calibrated signal paths, proper decoupling, and standardized interfaces to enable immediate functional verification, dynamic performance testing (e.g., SNR, THD), and firmware development - eliminating custom PCB spin time for engineers validating the ADC122S051 in portable or remote sensing applications.

Does the ADC122S051EVAL support both IN1 and IN2 channels simultaneously?

Yes - the ADC122S051EVAL supports independent access and simultaneous validation of both analog input channels (IN1 and IN2) of the ADC122S051. Jumper configurations allow users to route either channel to the test header, configure differential mode (IN1–IN2), or apply separate analog sources. The board preserves the ADC122S051's native channel-to-channel crosstalk specification (−86 dB) and offset match (±0.1 LSB) under real-world layout conditions.

Can the ADC122S051EVAL operate with a 5V supply?

Yes - the ADC122S051EVAL accommodates both 3.3V and 5V operation. Its onboard LP2950 regulator can be bypassed to supply the ADC122S051 directly from an external 5V source, enabling validation of the ADC122S051's specified 5V performance: 10 mW typical power consumption, 70.6 dB minimum SNR, and full 500 ksps throughput - all while maintaining compliance with the ADC122S051's absolute maximum ratings and thermal limits.

Is the ADC122S051EVAL compatible with TI's MSP430 LaunchPad?

Yes - the ADC122S051EVAL features a standard 10-pin 0.1"-spaced header with pinout aligned to TI's SPI interface conventions (CS, SCLK, DIN, DOUT, GND, VA). It is mechanically and electrically compatible with MSP430FR2355 and MSP430F5529 LaunchPads, allowing direct connection without adapters. Firmware examples and driver libraries for the ADC122S051 are available in TI's MSP430Ware SDK to accelerate integration.

Does the ADC122S051EVAL include ESD protection for analog inputs?

Yes - the ADC122S051EVAL retains the internal ESD protection diodes of the ADC122S051 IC (per AEC-Q100 Class C2 CDM qualification), and adds discrete 100 kΩ current-limiting resistors and 100 pF feedthrough capacitors on each analog input path. This dual-layer protection ensures robust handling during lab probing and prevents latch-up or damage when interfacing with unconditioned sensor outputs - consistent with the ADC122S051's ±1 µA input leakage and −0.3V to VA+0.3V absolute maximum input voltage rating.