Texas Instruments ADS6225EVM

Overview

ADS6225EVM from Texas Instruments is an evaluation module designed to characterize the ADS6225 dual-channel, 12-bit, 65-MSPS analog-to-digital converter under controlled analog input, clock, and supply conditions. It supports transformer-coupled and amplifier-based (THS4509) differential signal paths for channels A/B, provides LVDS serialized digital output via a Samtec QSH-060-01-F-D-A connector, and integrates configurable jumpers for gain mode, serialization ratio (14×), data format (MSB-first, offset binary), and operational mode (parallel default).

For engineers reviewing the ADS6225EVM datasheet, ADS6225EVM pinout, ADS6225EVM application, or ADS6225EVM equivalent, this page delivers verified hardware configuration details, jumper-default settings per ADS622x family, TSW1200 deserializer interface requirements, SFDR performance dependencies on transformer selection (e.g., Mini-Circuits TC4-1W), and practical guidance for coherent sampling setup with Agilent 8644B signal sources.

Technical Context

The ADS6225EVM implements a dual-channel ADC evaluation platform centered on the ADS6225 IC, configured by default in parallel mode using surface-mount jumpers J7 (pins 2–3) and J17–J21 set for 12-bit operation. It accepts single-ended analog inputs via SMA connectors J10/J11, converts them to differential signals using either Mini-Circuits TC4-1W transformers or the THS4509 amplifier path (enabled via JP1/JP2), and biases inputs using the ADC's internal VCM output.

Digital outputs include serialized LVDS data, DCLK, and FCLK routed to J15; clock input is applied to J12 as a filtered, low-phase-noise sine wave converted to differential by transformer T5. The EVM interfaces directly with TI's TSW1200 deserializer board via J15–J9 connection, requiring FPGA reset (SW4) after any clock frequency change to realign capture timing.

Key Specifications

Availability

ADS6225EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, radar front-end prototyping, and communications receiver development requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADS6225EVM 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 data converter technologies, with over 90 years of innovation in precision signal chain solutions.

The ADS62xxEVM product line was developed to accelerate evaluation of TI's dual-channel, high-speed pipeline ADCs-including the ADS6225-by providing validated reference layouts, jumper-configurable signal paths, and seamless interoperability with the TSW1200 deserializer platform.

FAQ

What is the primary function of the ADS6225EVM?

The ADS6225EVM is an evaluation module built to characterize the ADS6225 dual-channel, 12-bit, 65-MSPS analog-to-digital converter. It provides configurable analog input paths (transformer or THS4509 amplifier), precise clocking via J12, LVDS serialized digital output through J15, and full compatibility with TI's TSW1200 deserializer. The ADS6225EVM enables engineers to validate SNR, SFDR, and other key ADC metrics under real-world signal, reference, and supply conditions without custom PCB design.

Which ADC does the ADS6225EVM support by default?

The ADS6225EVM supports the ADS6225 as its designated target device, with jumper configurations (J17–J21, J7) explicitly set for 12-bit operation, 14× serialization, DDR/2-wire output, and parallel-mode reset. While the EVM board is shared across the ADS62xx family (including ADS624x), all default silkscreen markings and documented quick-start procedures for ADS6225EVM assume use of the ADS6225 or compatible ADS622x-series converters.

How is analog input handled on the ADS6225EVM?

The ADS6225EVM accepts analog signals via SMA connectors J10 (channel A) and J11 (channel B). Input conditioning is implemented either through a Mini-Circuits TC4-1W transformer for ac-coupled differential conversion or via the onboard THS4509 amplifier (enabled by JP1/JP2) for gain and dc-coupled flexibility. The ADC's internal VCM output sets common-mode bias, and external amplifier rails (±5 V applied to J21/J22) are required when using the THS4509 path. Transformer selection directly impacts measured SFDR, as shown in Figure 2 of the ADS6225EVM User's Guide.

What is required to interface the ADS6225EVM with the TSW1200?

To interface the ADS6225EVM with the TSW1200, connect J15 (EVM) to J9 (TSW1200) using a compatible Samtec cable, ensure jumper J11 on the TSW1200 is set to pins 1–2 for 12-bit deserialization, and verify ADS6225EVM jumpers J17–J21 match ADS622x defaults (e.g., J18 = 14×, J21 = MSB-first). After power-up, depress SW4 on the TSW1200 to reset the FPGA deserializer-this step is mandatory whenever the ADC clock frequency changes to maintain data alignment and valid capture.

Does the ADS6225EVM require external power supplies?

Yes-the ADS6225EVM requires three independent external power sources: +3.3 V analog (applied to P3), +3.3 V digital (applied to P1), and ±5 V for the THS4509 amplifier path (applied to J21 and J22). Banana jack terminals P1–P4 and J21–J22 provide screw-terminal access. When only transformer-coupled inputs are used, the ±5 V amplifier supplies may be left unconnected; however, the 3.3-V analog and digital rails must both be powered and may be shorted together for basic evaluation.