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50-Ohm 2-GHz Oscilloscope Front-end Reference Design TIDA-00826 (ACTIVE)

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Technical Documents

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Key Document

50-Ohm Oscilloscope Front-end Design Guide (PDF 1449 KB)
14 Dec 2015

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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 GHz
System ENOB of 6 to 8 bits is achieved with this signal chain
Supports a maximum input signal of ± 3V, with user-selectable options for input AC or DC coupling
DC-offset correction feature available in DC-coupled input mode
Three input-amplitude voltage adjustment settings provided by the front-end π-attenuator: 1:1, 2:1 and 5:1
Low noise, high-performance fully-differential amplifier (LMH5401) used for single-ended to differential conversion
High performance digitally-controlled variable-gain amplifier (LMH6401) programmable from 26dB to -6dB gain in 1-dB steps to maintain full-scale input at the ADC
12-bit ADC12J4000 operating at 4GSPS for sampling input signals
Design supports +5 V supply using wall-mount power adapter or +12 V using internal FMC connection

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Schematic/Block Diagram

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Design Files

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TI Devices (26)

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Part Number	Name	Product Family	Sample & Buy	Design Kits & Evaluation Modules
ADC12J4000	12-Bit, 4.0-GSPS, RF Sampling Analog-to-Digital Converter (ADC)	Analog-to-digital converters (ADCs)	Sample & Buy	View Design Kits & Evaluation Modules
CD74HC14	High Speed CMOS Logic Hex Schmitt-Triggered Inverters	Buffer/driver	Sample & Buy	View Design Kits & Evaluation Modules
CSD18532Q5B	60V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm	MOSFETs	Sample & Buy	View Design Kits & Evaluation Modules
DRV777	7-bit Integrated Motor and Relay Driver	Motor drivers	Sample & Buy	Not Available
LM26400Y	Dual 2A, 500kHz Wide Input Range Buck Regulator	Step-down (buck)	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
LMC555	World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz	Clock & timing	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
LMH6559	1750MHz, High-Speed, Closed-Loop Buffer	Operational amplifiers (op amps)	Sample & Buy	View Design Kits & Evaluation Modules
LMK04828	Ultra-low jitter synthesizer & jitter cleaner	Clock jitter cleaners	Sample & Buy	View Design Kits & Evaluation Modules
LMR70503	2.8V to 5.5V, 300mA Buck/Boost Negative Output Voltage Regulator	Buck-boost & inverting	Sample & Buy	View Design Kits & Evaluation Modules
LP38513	3A Fast Response Ultra Low Dropout Linear Regulator	Power management	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
SN74LVC1G57	Configurable Multiple-Function Gate	Gate	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
TPS2400	5.5V overvoltage protection controller with 100V input transient protection	Power switches	Sample & Buy	View Design Kits & Evaluation Modules
TPS54327	4.5V to 18V Input, 3-A Synchronous Step-Down Converter	Step-down (buck)	Sample & Buy	View Design Kits & Evaluation Modules
TPS63060	2.5V to 12V input voltage, 93% Efficient, 2.25A Switch Current Limit, Buck-Boost Converter	Buck-boost & inverting	Sample & Buy	View Design Kits & Evaluation Modules
TPS723	200mA Negative-Output Low-Dropout (LDO) Linear Regulator	Power management	Sample & Buy	Not Available
TPS732	Cap-Free, NMOS, 250mA Low Dropout Regulator with Reverse Current Protection	Power management	Sample & Buy	View Design Kits & Evaluation Modules
TPS74901	Single-output 3A LDO regulator, adjustable (0.8V to 3.6V), programmable soft start	Power management	Sample & Buy	View Design Kits & Evaluation Modules
TPS793	High PSRR, Low Noise, 200mA Single Output LDO,	Power management	Sample & Buy	View Design Kits & Evaluation Modules
TRF3765	300M-4800MHz Low Noise Integer-N/Fractional-N PLL with Integrated VCO and up to 8 Outputs	Clock & timing	Sample & Buy	View Design Kits & Evaluation Modules

CAD/CAE symbols

Part #	Package \| Pins	CAD File (.bxl)	STEP Model (.stp)
ADC12J4000	VQFNP (NKE) \| 68	Download	Download
CD74HC14	SOIC (D) \| 14	Download	Download
	PDIP (N) \| 14	Download	Download
	TSSOP (PW) \| 14	Download	-
CSD18532Q5B	VSON-CLIP (DNK)\| 8	Download	Download
DRV777	SOIC (D) \| 16		Download
	TSSOP (PW) \| 16		Download
LM26400Y	WSON (NHQ) \| 16	Download	Download
	HTSSOP (PWP) \| 16	Download	Download
LM95233	WSON (NHL) \| 14	Download	Download
LMC555	SOIC (D) \| 8	Download	Download
	VSSOP (DGK) \| 8		Download
	PDIP (P) \| 8		Download
LMC6762	SOIC (D) \| 8	Download	Download
LMH5401	UQFN (RMS) \| 14	Download	Download
LMH6559	SOT-23 (DBV) \| 5	Download	Download
	SOIC (D) \| 8	Download	Download
LMK04828	WQFN (NKD) \| 64	Download	Download
LMR70503	DSBGA (YFX) \| 8	Download	-
LP38513	TO-263 (KTT) \| 5		Download
	TO-220 (NDH) \| 5		Download
OPA376	SOT-23 (DBV) \| 5	Download	Download
	SOT-SC70 (DCK) \| 5	Download	Download
	SOIC (D) \| 8	Download	Download
SN74AVC4T774	TSSOP (PW) \| 16	Download	Download
	VQFN (RGY) \| 16	Download	Download
	UQFN (RSV) \| 16	Download	Download
SN74LVC1G57	SOT-23 (DBV) \| 6	Download	Download
	SOT-SC70 (DCK) \| 6	Download	Download
	SOT-5X3 (DRL) \| 6	Download	Download
	USON (DRY) \| 6	Download	Download
	X2SON (DSF) \| 6	Download	Download
	DSBGA (YZP) \| 6	Download	-
TLV702	SOT-23 (DBV) \| 5	Download	Download
	WSON (DSE) \| 6	Download	Download
TPS2400	SOT-23 (DBV) \| 5	Download	Download
TPS54327	HSOIC (DDA) \| 8	Download	Download
	VSON (DRC) \| 10		Download
TPS63060	WSON (DSC) \| 10	Download	Download
TPS723	SOT-23 (DBV) \| 5	Download	Download
TPS732	SOT-23 (DBV) \| 5		Download
	SOT-223 (DCQ) \| 6		Download
	VSON (DRB) \| 8		Download
TPS74901	TO-263 (KTW) \| 7	Download	Download
	VSON (DRC) \| 10		Download
	VQFN (RGW) \| 20	Download	Download
TPS793	SOT-23 (DBV) \| 5		Download
	SOT-23 (DBV) \| 6		Download
TRF3765	VQFN (RHB) \| 32	Download	Download

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Technical Documents

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

User guides (1)

Title	Type	Size (KB)	Date
50-Ohm Oscilloscope Front-end Design Guide	PDF	1449	14 Dec 2015

Design files (4)

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

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50-Ohm 2-GHz Oscilloscope Front-end Reference Design TIDA-00826 (ACTIVE)

Key Document

Description

Features

Schematic/Block Diagram

Test Data

Design Files

TI Devices (26)

CAD/CAE symbols

Technical Documents

User guides (1)

Design files (4)

Support & training

Training & events

Technical articles

50-Ohm 2-GHz Oscilloscope Front-end Reference Design TIDA-00826 (ACTIVE)

Key Document

Description

Features

Schematic/Block Diagram

Test Data

Design Files

TI Devices (26)

CAD/CAE symbols

Technical Documents

User guides (1)

Design files (4)

Applications

Support & training

Training & events

Technical articles