Texas Instruments DEM-ADS830E

Overview

DEM-ADS830E from Texas Instruments is an evaluation fixture designed specifically for the ADS830E 8-bit, 60 Msps analog-to-digital converter. It supports AC- or DC-coupled inputs, single-ended or differential configurations, and external reference operation. The board integrates an OPA681 driver op amp, dual IDT74FCT541 CMOS octal buffers, and configurable solder-jumpers (JP1–JP8) to enable rapid validation of high-speed ADC performance in lab and design verification environments.

For engineers reviewing the DEM-ADS830E datasheet, DEM-ADS830E pinout, DEM-ADS830E application, or DEM-ADS830E equivalent, this board enables fast functional validation of ADS830E-based signal acquisition systems - especially where sampling fidelity, input flexibility (AC/DC, SE/diff), clock jitter sensitivity, and logic-level interfacing (+3V/+5V VDRV support) are critical selection criteria.

Technical Context

The DEM-ADS830E is a four-layer, surface-mount evaluation board built around the ADS830E 20-pin SSOP ADC. It separates analog front-end power (±5V via P1) from digital converter supply (+5V via P2) and provides dedicated VDRV logic supply routing. Signal conditioning includes OPA681 current-feedback op amp with selectable gain (+2 V/V default) and configurable level-shifting network for DC-coupled operation.

Input configuration options include transformer-coupled differential mode (using Mini-Circuits TT1-6 RF transformer), SMA clock input (50 Ω, low-jitter required), and jumper-selectable internal/external reference (JP2, JP3, JP4). Data output uses straight offset binary coding and is buffered through two FCT541 octal drivers to CN1, supporting clean CMOS-level interface to test equipment or host logic.

Key Specifications

Availability

DEM-ADS830E is available at Aetrix Electronics and suitable for high-speed data acquisition prototyping, ADC performance benchmarking, and mixed-signal system integration requiring stable component supply for engineering validation, production test development, and customer demo deployment.

Supply support for DEM-ADS830E 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, specializing in analog, embedded processing, and high-performance data conversion technologies.

The DEM-ADS830E belongs to TI's precision data converter evaluation platform family, engineered to accelerate time-to-test for high-speed ADCs used in communications infrastructure, test & measurement, and real-time signal processing applications.

FAQ

What is the primary function of the DEM-ADS830E evaluation board?

The DEM-ADS830E evaluation board is a purpose-built hardware platform for rapid functional and performance validation of the ADS830E 8-bit, 60 Msps analog-to-digital converter. It provides configurable signal conditioning, clocking, reference, and digital output buffering - enabling engineers to evaluate the ADS830E under realistic operating conditions without custom PCB design. The DEM-ADS830E simplifies lab setup and reduces iteration time during ADC selection and system integration phases.

Can the DEM-ADS830E be used with the ADS831E instead of the ADS830E?

Yes - the DEM-ADS830E board is mechanically and electrically compatible with both the ADS830E and ADS831E converters, as confirmed by TI's SBAU072 documentation. While the DEM-ADS830E is labeled for ADS830E, its schematic, layout, and jumper configuration support the ADS831E (8-bit, 80 Msps) with identical pinout and interface requirements. Users must verify clock source jitter and layout integrity when operating at 80 Msps.

How does the DEM-ADS830E handle different logic voltage levels for digital output?

The DEM-ADS830E supports both +3V and +5V logic interfacing via the ADS830E's dedicated VDRV supply pin. On the board, VDRV is routed through connector P2 and shorted to the +5V analog supply using 0Ω resistor R25. To use +3V logic, remove R25 and apply +3V to P2 pin 2 - enabling direct compatibility with modern low-voltage FPGAs or microcontrollers without level-shifting circuitry.

What input configurations does the DEM-ADS830E support, and how are they selected?

The DEM-ADS830E supports AC-coupled, DC-coupled, and transformer-coupled differential inputs. AC coupling is factory-configured using C29; DC coupling requires reconfiguring U4 (OPA681) with R7 and JP8 for level shifting. Differential mode requires installing TT1-6 transformer (U5), R17/R18, and removing bias resistors (R20–R23) and C15 - all documented in the SBAU072 user guide. Configuration is achieved via solder jumpers and discrete component placement - no firmware or software changes needed.

Is an external clock required to operate the DEM-ADS830E, and what are the key requirements?

Yes - the DEM-ADS830E requires an external clock applied to SMA connector J1. The input presents a 50 Ω termination, and TI specifies that low-jitter performance is essential - especially near the ADS830E's 60 Msps maximum sampling rate or during undersampling tests. A clock source with sub-1 ps RMS jitter is recommended to avoid aperture uncertainty and preserve SNR/SFDR specifications verified on the DEM-ADS830E.