TIDA-00826 Reference Design

Texas Instruments

50-Ohm 2-GHz Oscilloscope Front-end Reference Design

Description

This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.

Features
  • 50-Ω input: analog front-end with input signal bandwidth of 2 GHzSystem ENOB of 6 to 8 bits is achieved with this signal chainSupports a maximum input signal of ± 3V: with user-selectable options for input AC or DC couplingDC-offset correction feature available in DC-coupled input modeThree input-amplitude voltage adjustment settings provided by the front-end π-attenuator: 1:1: 2:1 and 5:1Low noise: high-performance fully-differential amplifier (LMH5401) used for single-ended to differential conversionHigh performance digitally-controlled variable-gain amplifier (LMH6401) programmable from 26dB to -6dB gain in 1-dB steps to maintain full-scale input at the ADC12-bit ADC12J4000 operating at 4GSPS for sampling input signalsDesign supports +5 V supply using wall-mount power adapter or +12 V using internal FMC connection
Applications
  • Oscilloscope (DSO)
  • Digital multimeter (DMM)
  • Lab & field Instrumentation
  • Spectrum analyzer
  • Data acquisition (DAQ)
  • Vector signal transceiver (VST)
  • Wireless communications test
Product Categories
  • Amplifiers

Parts

Part Number Name Companion Part
ADC12J4000 ADC12J4000 Buy Datasheet
CD74HC14 CD74HC14 Buy Datasheet
DRV777 DRV777 Buy Datasheet
LM26400Y LM26400Y Buy Datasheet
LM95233 LM95233 Buy Datasheet
LMC555 LMC555 Buy Datasheet
LMC6762 LMC6762 Buy Datasheet
LMH6559 LMH6559 Buy Datasheet
LMK04828 LMK04828 Buy Datasheet
LMR70503 LMR70503 Buy Datasheet
LP38513 LP38513 Buy Datasheet
OPA376 OPA376 Buy Datasheet
SN74AVC4T774 SN74AVC4T774 Buy Datasheet
SN74LVC1G57 SN74LVC1G57 Buy Datasheet
TPS2400 TPS2400 Buy Datasheet
TPS54327 TPS54327 Buy Datasheet
TPS63060 TPS63060 Buy Datasheet
TPS74901 TPS74901 Buy Datasheet
TRF3765 TRF3765 Buy Datasheet

Bill Of Materials

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Schematic

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00826 PCB 18 Dec 2015 PDF 28400
TIDA-00826 BOM 18 Dec 2015 PDF 283
TIDA-00826 Schematic 18 Dec 2015 PDF 3700
TIDA-00826 Gerber 30 Nov 2015 ZIP 1121