12.8-GSPS analog front end reference design for high-speed oscilloscope and wide-band digitizer
TIDA-01028
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Key Document

Description

This reference design provides a practical example of interleaved RF-sampling analog-to-digital converters (ADCs) to achieve a 12.8-GSPS sampling rate. This is achieved by time-terleaving two RF-sampling ADCs. Interleaving requires a phase shift between the ADCs, which this reference design achieves using the Noiseless Aperture Delay Adjustment (tAD Adjust) feature of the ADC12DJ3200. This feature is also used to minimize mismatches typical of interleaved ADCs: maximizing SNR, ENOB, and SFDR performance. A low phase noise clocking tree with JESD204B support is also featured on this reference design, and it is implemented using the LMX2594 wideband PLL and the LMK04828 synthesizer and jitter cleaner.

Features
  • Sampling rate up to 12.8GSPS, using timeinterleaved 12-bit RF-sampling ADCs
  • Analog front end support up to 6-GHz bandwidth
  • Fine sample clock phase adjustment (19 fs resolution)
  • Phase synchronization of multiple ADCs
  • Companion power reference design with a >85% efficiency at 12-V input
  • JESD204B supporting 8, 16, or 32 JESD lanes, data rates up to 12.8 Gbps per lane

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TI Devices (25)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADC12DJ3200  12-bit, dual 3.2-GSPS or single 6.4-GSPS, RF-sampling analog-to-digital converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ADC12DJ5200RF  RF-sampling 12-bit ADC with dual 5.2-GSPS or single 10.4-GSPS  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
CSD15571Q2  20V, N ch NexFET MOSFET™, single SON2x2, 19.2mOhm  MOSFETs  Sample & Buy Not Available
DS90LT012AQ-Q1  Automotive LVDS Differential Line Receiver  Interface  Sample & Buy View Design Kits & Evaluation Modules
DS90LV028AQ-Q1  Automotive LVDS Dual Differential Line Receiver  Interface  Sample & Buy View Design Kits & Evaluation Modules
LM95233  ±2°C Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
LMC6762  Dual Micro-Power Rail-to-Rail Input CMOS Comparator with Push-Pull Output  Amplifiers  Sample & Buy Not Available
LMH5401  8GHz Ultra Wideband Fully Differential Amplifier  Special function amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LMH6401  4.5 GHz ultra wideband digital variable gain amplifier  RF & microwave  Sample & Buy View Design Kits & Evaluation Modules
LMK00304  3.1-GHz Differential Clock Buffer/Level Translator  Clock buffers  Sample & Buy View Design Kits & Evaluation Modules
LMK04828  Ultra-low jitter synthesizer & jitter cleaner  Clock jitter cleaners  Sample & Buy View Design Kits & Evaluation Modules
LMK61E2  Ultra-Low Jitter Fully Programmable Oscillator, Integrated EEPROM, +/-50ppm  Clock & timing  Sample & Buy View Design Kits & Evaluation Modules
LMX2594  15 GHz Wideband PLLatinum™ RF Synthesizer with Phase Synchronization and JESD204B support  Clock & timing  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
SN74AVC4T774  4-bit dual-supply bus transceiver with configurable voltage-level shifting and 3-state outputs  Voltage level translation  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G08  Single 2-Input Positive-AND Gate  Gate  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G125  Single Bus Buffer Gate With 3-State Outputs  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC2G53  Single Pole, Double-Throw (SPDT) Analog Switch or 2:1 Analog Multiplexer/Demultiplexer  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
TCA9534A  Remote 8-Bit I2C and Low-Power I/O Expander With Interrupt Output and Configuration Registers  I2C  Sample & Buy View Design Kits & Evaluation Modules
TLV702  300mA Low-Iq Low-Dropout (LDO) Regulator for Portables  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS25926  12V, 5A, 30mΩ eFuse with Adjustable +/-15% Accurate Current Limit  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS7A33  -3-V to -36-V VIN, 1-A output current, ultra-low-noise, high-PSRR, LDO linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A8300  2A, Low-Dropout Voltage Regulator for High-Speed Communication Systems  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A84  High-Current (3A), High-Accuracy (1%), Low-Noise (4.4μVRMS), LDO Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS82130  3-A 17V Step-down Converter Module with Integrated Inductor  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADC12DJ3200 Download
ADC12DJ5200RF Download -
CSD15571Q2 WSON (DQK)| 6 Download
DS90LT012AQ-Q1 Download Download
DS90LV028AQ-Q1 Download Download
LM95233 Download Download
LMC6762 Download Download
LMH5401 Download Download
LMK00304 Download Download
LMK04828 Download Download
LMK61E2 Download Download
LMX2594 Download Download
OPA376 Download Download
Download Download
Download Download
SN74AVC4T774 Download Download
Download Download
Download Download
SN74LVC1G08 Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC1G125 Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC2G53 Download Download
Download Download
Download -
TCA9534A Download
Download
TLV702 Download Download
Download Download
TPS25926 Download
TPS7A33 Download -
Download Download
TPS7A8300 Download
Download -
TPS7A84 Download Download
TPS82130 uSiP (SIL)| 8 Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Datasheet (1)
Title Type Size (KB) Date
PDF 3098 21 Jun 2017
Application notes (1)
Title Type Size (KB) Date
PDF 140 28 Nov 2001
User guides (1)
Title Type Size (KB) Date
PDF 6295 05 Mar 2019
White papers (1)
Title Type Size (KB) Date
PDF 587 01 Feb 2005
Design files (6)
Title Type Size (KB) Date
PDF 240 22 May 2019
ZIP 13521 05 Mar 2019
ZIP 41928 05 Mar 2019
PDF 28699 05 Mar 2019
PDF 2940 05 Mar 2019
PDF 4789 05 Mar 2019
Related Tools & Software

Reference Designs  ( 1 )

Design Kits & Evaluation Modules  ( 2 )

Name Part Number Tool Type
ADC12DJ3200 12-bit, dual 3.2-GSPS or single 6.4-GSPS, RF-sampling ADC evaluation module  ADC12DJ3200EVM  Evaluation Modules & Boards 
Data capture/pattern generator: data converter EVM with 16 JESD204B lanes from 1.6-15Gbps  TSW14J57EVM  Evaluation Modules & Boards 

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