4 GHz Clock Reference Design for 12 Bit High Speed ADCs in Digital Oscilloscopes & Wireless Testers


Design files


The TIDA-01015 is a clocking solution reference design for high speed direct RF sampling GSPS ADCs. This design showcases the significance of the sampling clock to achieve high SNR for 2nd Nyquist zone input signal frequencies. ADC12J4000 is a 12-bit, 4-GSPS RF sampling ADC with 3-dB input bandwidth of 3.2 GHz capable of capturing signals up to 4 GHz. This design highlights a clocking solution for the ADC12J4000 using TRF3765, to achieve high SNR performance at high input frequencies used in applications such as digital storage oscilloscopes (DSO) and wireless testers.

  • 12-bit, 4-GSPS RF sampling ADC clocking solution
  • Up to 4-GHz input signal capture capability
  • JESD204B compliant low-phase noise clocking solution for RF sampling ADC
??image.gallery.download_en_US?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data

TIDRP55.PDF (398 K)

Detailed schematic diagram for design layout and components

TIDRP56.PDF (69 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRP57.PDF (1635 K)

Detailed overview of design layout for component placement

TIDRP59.ZIP (10462 K)

Files used for 3D models or 2D drawings of IC components

TIDCD06.ZIP (713 K)

Design file that contains information on physical board layer of design PCB

TIDRP58.PDF (2245 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS543274.5V to 18V Input, 3-A Synchronous Step-Down Converter

Data sheet: PDF | HTML
Clock jitter cleaners & synchronizers

LMK04828Ultra low-noise JESD204B compliant clock jitter cleaner with integrated 2370 to 2630-MHz VCO0.

Data sheet: PDF | HTML
Direction-controlled voltage translators

SN74AVC4T7744-bit dual-supply bus transceiver with configurable voltage-level shifting and 3-state outputs

Data sheet: PDF | HTML
High-speed ADCs (≥10 MSPS)

ADC12J400012-Bit, 4.0-GSPS, RF Sampling Analog-to-Digital Converter (ADC)

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TLV702300-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS749013-A, low-VIN (0.8-V) adjustable ultra-low-dropout voltage regulator with power good and enable

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74LVC1G125Single 1.65-V to 5.5-V buffer with 3-state outputs

Data sheet: PDF | HTML
RF PLLs & synthesizers

TRF3765300M-4800MHz Low Noise Integer-N/Fractional-N PLL with Integrated VCO and up to 8 Outputs

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide 4GHz Clock for 12Bit High Speed ADCs in DSO and Wireless Testers Ref Design Dec. 14, 2016

Related design resources

Hardware development

ADC12J4000EVM ADC12J4000 12-Bit, 4.0-GSPS, RF Sampling Analog-to-Digital Converter Evaluation Module

Reference designs

TIDA-00359 Clocking Solution Reference Design for GSPS ADCs TIDA-01016 Clocking Reference Design for RF Sampling ADCs in Signal Analyzers and Wireless Testers TIDA-01017 High Speed Multi-Channel ADC Clock Reference Design for Oscilloscopes, Wireless Testers and Radars TIDA-01021 Multi-channel JESD204B 15-GHz clocking reference design for DSO, radar and 5G wireless testers TIDA-01022 Flexible 3.2-GSPS multi-channel AFE reference design for DSOs, radar and 5G wireless test systems TIDA-01023 High Channel Count JESD204B Clock Generation Reference Design for RADAR and 5G Wireless Testers TIDA-01024 High Channel Count JESD204B Daisy Chain Clock Reference Design for RADAR and 5G Wireless Testers

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​