Texas Instruments ADS5546EVM

Overview

ADS5546EVM from Texas Instruments is an evaluation module designed to characterize the ADS5546 16-bit, 95-MSPS analog-to-digital converter under controlled signal, clock, reference, and power conditions. It supports transformer-coupled single-ended analog input (J6), onboard VCXO + CDCE72010 clock generation (245.76 MHz LVCMOS output via crystal filter), and dual power supply options (LDO-only or cascaded switching/LDO). The EVM enables high-fidelity ADC performance validation in RF receiver and communications test applications.

For engineers reviewing the ADS5546EVM datasheet, ADS5546EVM pinout, ADS5546EVM application, or ADS5546EVM equivalent, this page details its configurable clock routing (SMA J19 direct or CDCE72010-derived), analog input path selection (transformer vs. THS4509 amplifier), jumper-controlled power topology (JP13/JP14/JP16/JP19), and compatibility with TSW1200 capture hardware for FFT-based SNR/SFDR analysis.

Technical Context

The ADS5546EVM implements a modular signal chain architecture with three primary subsystems: (1) Analog front-end supporting transformer-coupled (J6) or THS4509-amplified (J8/J9/J11) inputs, selectable via SJP1–SJP5 jumpers; (2) Clock interface offering direct SMA J19 injection or on-board VCXO+CDCE72010 synthesis (factory-configured divide-by-4, 983.04 MHz VCXO → 245.76 MHz Y0 output); (3) Power delivery with three jumper-selectable topologies - LDO-only (5.1–5.5 V on J7), cascaded TPS5420D+TPS79501 (6–36 V on J7), or isolated AVDD/DVDD measurement mode.

Control logic is implemented via static jumper configuration rather than SPI register access by default (JP12 = 1-2), though serial control remains available via JP11/JP9/JP15. All critical signal paths - clock routing (SJP4/SJP6/SJP7), power rail selection (JP13/JP14/JP16/JP19), and analog input switching (SJP1–SJP5) - are validated through documented jumper tables and schematic diagrams in SLWU061A.

Key Specifications

Availability

ADS5546EVM is available at Aetrix Electronics and suitable for RF receiver development, high-speed data acquisition system validation, and communications test equipment prototyping requiring stable component supply and full-spectrum ADC characterization capability.

Supply support for ADS5546EVM 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The ADS5546EVM belongs to TI's high-speed ADC evaluation platform family, engineered specifically to accelerate time-to-test for precision wideband digitizers used in spectrum analyzers, radar receivers, and software-defined radio systems.

FAQ

What is the primary function of the ADS5546EVM?

The ADS5546EVM is an evaluation module built to characterize the ADS5546 16-bit, 95-MSPS analog-to-digital converter under real-world signal integrity, clock jitter, power supply noise, and thermal conditions. It provides configurable analog input paths, multiple clocking schemes (including onboard VCXO + CDCE72010), and jumper-selectable power topologies - all documented in User's Guide SLWU061A. The ADS5546EVM enables engineers to validate dynamic performance metrics like SNR, SFDR, and ENOB before integrating the ADS5546 into final designs.

Does the ADS5546EVM support direct SPI control of the ADS5546?

Yes, the ADS5546EVM supports serial SPI control of the ADS5546 register space, but it defaults to parallel pin control (JP12 = 1-2). To enable SPI mode, configure JP11 (SDA), JP9 (SEN), JP15 (OE), and J2 (DFS) per Table 1 in SLWU061A. The TI ADC SPI Control Software (Section 3) provides GUI-based register access, allowing users to adjust gain, offset, test patterns, and power-down states without modifying hardware jumpers. This functionality is fully implemented and verified on the ADS5546EVM.

Can the ADS5546EVM generate its own clock signal without external equipment?

Yes, the ADS5546EVM can generate its own clock using the onboard VCXO and CDCE72010 clock buffer. When J18 is set to 1-2 (VCXO enabled) and SJP4/SJP7 configured for CDCE72010 reference and output routing, the module produces a 245.76 MHz LVCMOS clock on Y0 - filtered by an optional 245.76 MHz crystal - directly usable by the ADS5546. A 20-MHz reference must be supplied to J19 to lock the CDCE72010. This self-contained clocking option eliminates dependency on external signal generators during bench testing of the ADS5546EVM.

What analog input configurations does the ADS5546EVM support?

The ADS5546EVM supports two distinct analog input configurations: (1) Transformer-coupled single-ended input via SMA J6 (default, using ADT4-1WT transformers), and (2) Amplified differential input via THS4509 op-amp powered by J9/J11. Selection is controlled by surface-mount jumpers SJP1–SJP5. For amplified mode, SJP1/SJP2 are set to 2-3, SJP5 to 2-3, and JP7 to 2-3 to enable the THS4509. Both paths feed the same ADS5546 input pins and are fully documented in Section 2.2.3 of SLWU061A.

Is the ADS5546EVM compatible with the TSW1200 capture board?

Yes, the ADS5546EVM is explicitly designed for seamless integration with the TSW1200 capture board. J10 provides LVDS parallel digital output aligned to the ADS5546's timing specification, and the TSW1200 GUI includes dedicated TI ADC selection menus for the ADS5546. Section 4.1 of SLWU061A confirms this interoperability, including jumper settings (JP8, J22) and voltage sourcing (5 V from TSW1200 banana jacks to J7) required to power both boards synchronously during FFT-based performance evaluation of the ADS5546EVM.