Texas Instruments ADS6145EVM

Overview

ADS6145EVM from Texas Instruments is an evaluation module designed to characterize the ADS6145, a 14-bit, 105-MSPS low-power analog-to-digital converter (ADC) with parallel CMOS digital outputs and internal reference. It supports transformer-coupled or THS4509-amplified analog input paths, differential clocking via transformer or CDCP1803 LVDS fanout, and configurable data format (offset binary/2's complement), gain (0 dB/3.5 dB), and reference (internal/external). The EVM enables high-fidelity SNR and SFDR measurement under controlled analog, clock, and supply conditions.

For engineers reviewing the ADS6145EVM datasheet, ADS6145EVM pinout, ADS6145EVM application, or ADS6145EVM equivalent, this page delivers verified hardware configuration details, jumper-dependent interface modes (parallel vs. SPI), breakout board signal mapping, clock distribution options (transformer vs. CDCP1803), and ADC-specific evaluation best practices for coherent sampling and jitter-limited performance validation.

Technical Context

The ADS6145EVM implements dual analog input paths: a passive transformer-coupled path for ac-coupled single-ended signals and an active THS4509-based path supporting dc- or ac-coupled operation with 10 dB gain. Jumper-selectable configurations determine VCM biasing, amplifier power, and common-mode level setting-critical for maintaining ADC input compliance across coupling methods.

Digital interface flexibility includes parallel CMOS output routing to a Samtec QSO-060-01-F-D-A connector (J10), USB-controlled SPI register access via onboard interface circuitry (requiring 5 V on J20), and FPGA-compatible control using TSW1100/TSW1200 platforms. Clocking supports either filtered single-ended sine-wave input (J9) converted to differential by T3, or low-jitter LVDS fanout from CDCP1803 when JP2–JP4 are reconfigured.

Key Specifications

Availability

ADS6145EVM is available at Aetrix Electronics and suitable for high-speed data acquisition systems, radar front-end prototyping, communications test equipment, and precision instrumentation requiring stable component supply and validated ADC evaluation infrastructure.

Supply support for ADS6145EVM 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 specializing in analog, embedded processing, and high-performance signal chain solutions, with leadership in data converters, clocking, and interface technologies.

The ADS61xx EVM series-including ADS6145EVM-is part of TI's precision high-speed ADC evaluation platform family, engineered to accelerate design-in of 12- and 14-bit ADCs in demanding applications such as medical imaging, test & measurement, and broadband communications.

FAQ

What is the primary function of the ADS6145EVM?

The ADS6145EVM is an evaluation module specifically built to assess the performance of the ADS6145 14-bit, 105-MSPS analog-to-digital converter. It provides configurable analog input conditioning (transformer or THS4509 amplifier), flexible clocking (transformer or CDCP1803), parallel CMOS digital output routing, and SPI register control capability. The ADS6145EVM enables accurate measurement of key metrics including SNR, SFDR, and ENOB under real-world signal, clock, and supply conditions.

Which ADC models does the ADS6145EVM support besides the ADS6145?

The ADS6145EVM supports the full ADS61xx and ADS61B23 family, including ADS6122, ADS6123, ADS6124, ADS6125, ADS6142, ADS6143, ADS6144, ADS6145, and ADS61B23. All share the same PCB layout and jumper-based configuration system; differences in resolution (12- vs. 14-bit), sample rate, and input structure are accommodated through jumper settings and compatible peripheral components like the THS4509 amplifier.

How do I configure the ADS6145EVM for SPI register control instead of parallel mode?

To enable SPI control on the ADS6145EVM, move jumper J3 to positions 1–2 (serial mode), J2 to 1–2 (USB/FPGA SEN control), J6 to 1–2 (USB/FPGA SDATA control), and J7 to 1–2 (USB/FPGA SCLK control). Also supply 5 V to J20 to power the USB interface circuitry. Once configured, the TI ADC SPI Control Software communicates with the ADS6145EVM via USB to write to any register address listed in the ADS6145 datasheet.

What are the two analog input path options on the ADS6145EVM and how are they selected?

The ADS6145EVM offers two analog input paths: (1) transformer-coupled (via SMA J8), and (2) THS4509-amplified (via SMA J10). Selection is made using surface-mount jumpers JP5 and JP6: shorting both to positions 1–2 selects the transformer path; shorting both to 2–3 selects the THS4509 path. JP7 must also be set to 1–2 to power the amplifier. The THS4509 path supports adjustable gain (0 dB or 3.5 dB via J4) and dc/ac coupling options defined by component population (R37/R45, C75/C77).

Can the ADS6145EVM connect directly to FPGA development boards, and if so, which ones?

Yes, the ADS6145EVM natively interfaces with TI's TSW1200 FPGA platform via direct mating of its Samtec connector, and supports connection to the TSW1100 capture board using the included CMOS breakout board. For TSW1100, users must update the Supported_ADCs.txt file and configure the ADS6145EVM in CMOS output mode. For FPGA-controlled SPI operation on either platform, specific surface-mount resistor replacements (e.g., R7→R62, R20→R63) and jumper repositioning (J2/J3/J6/J7) are required per Section 4.2 of the user's guide.