Texas Instruments ADS4146EVM

Overview

ADS4146EVM from Texas Instruments is an evaluation module designed to characterize the ADS4146 14-bit, 125-MSPS analog-to-digital converter (ADC) under configurable signal, clock, reference, and power supply conditions. It supports transformer-coupled single-ended analog input (J6), external or onboard CDCE72010-derived clocking (up to 245.76 MHz), dual 1.8-V analog/digital supplies (LDO or switching regulator), and LVDS digital output capture via J10.

For engineers reviewing the ADS4146EVM datasheet, ADS4146EVM pinout, ADS4146EVM application, or ADS4146EVM equivalent, this module enables rapid ADC performance validation-including SNR, SFDR, and FFT analysis-using HSDC Pro with TSW1400, while supporting flexible power, clock, and analog input configuration for RF receiver, communications test, and high-speed data acquisition prototyping.

Technical Context

The ADS4146EVM implements a modular, jumper-configurable architecture centered on the ADS4146 ADC, with independent control paths for power (TPS79618 LDO or TPS62562 buck regulator), clock (direct SMA J19 or CDCE72010 + VCXO), and analog input (transformer-coupled J6 or THS4509 amplifier). All configuration is managed via physical jumpers and surface-mount zero-ohm resistors-not firmware-ensuring deterministic, repeatable hardware states.

It integrates TI's standard high-speed ADC evaluation infrastructure: LVDS output termination at J10, USB-controlled SPI register access (via optional TI ADC SPI Interface), and compatibility with HSDC Pro software for FFT, histogram, and spectral analysis. The board includes dedicated banana jacks (J16, J9, J11) for isolated power delivery and operational amplifier biasing, enabling precise current consumption measurement and amplifier-assisted signal conditioning.

Key Specifications

Availability

ADS4146EVM is available at Aetrix Electronics and suitable for RF receiver development, high-speed test instrumentation, communications baseband prototyping, and academic ADC characterization requiring stable component supply and full documentation support.

Supply support for ADS4146EVM 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 high-performance silicon solutions for industrial, automotive, and communications markets.

The ADS4146EVM belongs to TI's high-speed data converter evaluation platform family, engineered specifically to accelerate time-to-test for pipeline ADCs used in wideband receivers, spectrum analyzers, and digital predistortion systems.

FAQ

What is the primary function of the ADS4146EVM?

The ADS4146EVM is a hardware evaluation platform designed exclusively to assess the electrical performance-such as SNR, SFDR, ENOB, and jitter sensitivity-of the ADS4146 14-bit, 125-MSPS analog-to-digital converter. It provides configurable analog input, clocking, power, and digital output paths, enabling engineers to validate the ADS4146 under real-world signal chain conditions before system integration. The ADS4146EVM does not operate as a standalone product but serves as a test vehicle for the ADS4146 IC.

Which ADC does the ADS4146EVM support out of the box?

The ADS4146EVM is physically and electrically configured to evaluate the ADS4146 device by default, as confirmed by its schematic, jumper defaults (e.g., JP12 = 1–2 for parallel mode), and user guide scope. While the board shares mechanical and layout compatibility with other ADS41xx/ADS58B18 devices (e.g., ADS4126, ADS4149), each requires specific jumper and resistor configurations-and the ADS4146EVM documentation explicitly lists ADS4146 among its supported devices in Section 1. The ADS4146EVM is not pre-configured for any other variant without manual rework.

Does the ADS4146EVM include an onboard clock generator?

The ADS4146EVM includes the CDCE72010 clock buffer IC and footprint for a 983.04-MHz VCXO, but neither the VCXO nor the crystal filter is populated by default. When installed and configured (JP4 = 1–2, R107/R114 installed), the CDCE72010 generates a 245.76-MHz LVCMOS clock (Y0 output) derived from the VCXO via factory-programmed ÷4 division. This option enables self-contained clocking for applications where external low-jitter sources are unavailable-though the ADS4146EVM operates in direct-clock mode (J19 input) out of the box.

How is analog input delivered to the ADS4146 on the ADS4146EVM?

Analog input reaches the ADS4146 on the ADS4146EVM primarily through transformer coupling: a 50-Ω, 0-V offset, –1-dBFS sine wave applied to SMA connector J6 is converted to differential format by two cascaded Mini-Circuits ADT4-1WT transformers. This path is enabled by default jumper settings (R84, R94, R97, R98 installed). Alternatively, the THS4509 fully differential amplifier can be engaged (R95/R96/R99/R106 installed, J9 = +5 V, J11 = GND) to condition low-amplitude or DC-coupled signals prior to ADC sampling.

Can the ADS4146EVM be used with the TSW1400 data capture board?

Yes-the ADS4146EVM is fully compatible with the TSW1400 high-speed data capture board via its 20-pin J10 LVDS header. When connected, the TSW1400 provides automatic 100-Ω termination for all LVDS data pairs, eliminating need for external resistors. Paired with TI's HSDC Pro software, the combination enables real-time FFT, spectral analysis, and single-tone testing of the ADS4146. The ADS4146EVM user guide includes step-by-step setup instructions (Section 4 and Section 5) confirming this validated workflow.