Fully-Differential Amplifier. LMH3401 Datasheet

LMH3401 Amplifier. Datasheet pdf. Equivalent

Part LMH3401
Description Fully-Differential Amplifier
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LMH3401
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LMH3401
SBOS695A – AUGUST 2014 – REVISED DECEMBER 2014
LMH3401 7-GHz, Ultra-Wideband, Fixed-Gain, Fully-Differential Amplifier
1 Features
1 Excellent Single-Ended to Differential Conversion
Performance from DC to 2 GHz
• 7-GHz, –3-dB Bandwidth
• Excellent HD2 and HD3 to 2 GHz:
– –96 (HD2), –102 (HD3) at 10 MHz
– –79 (HD2), –77 (HD3) at 500 MHz
– –64 (HD2), –72 (HD3) at 1 GHz
– –55 (HD2), –40 (HD3) at 2 GHz
• Best in Class OIP3 Performance to 2 GHz:
– 45 dBm at 200 MHz
– 33 dBm at 1 GHz
– 24 dBm at 2 GHz
• Fixed Single-Ended to Differential Voltage Gain:
16 dB
• Noise Figure: 9 dB at 200 MHz (RS = 50 Ω)
• Slew Rate: 18,000 V/µs
• Supports Single-Supply or Split-Supply Operation
• Powered-Down Feature
• Supply Current: 55 mA
2 Applications
• GSPS ADC Drivers
• ADC Drivers for High-Speed Data Acquisition
• ADC Driver for 1-GBPS Ethernet over Microwave
• DAC Buffers
• Wideband Gain Stages
• Single-Ended to Differential Conversions
• Level Shifters
3 Description
The LMH3401 is a very high-performance, differential
amplifier optimized for radio frequency (RF),
intermediate frequency (IF), or high-speed, time-
domain applications. This device is ideal for dc- or ac-
coupled applications that require a single-ended to
differential conversion when driving an analog-to-
digital converter (ADC). The LMH3401 generates
very low levels of second-order and third-order
distortion when operating in single-ended-input to
differential-output or differential-input to differential-
output mode.
The on-chip resistors simplify printed circuit board
(PCB) implementation and provide the highest
performance over the usable bandwidth of 2 GHz.
This performance makes the LMH3401 ideal for
applications such as test and measurement,
broadband communications, and high-speed data
acquisition. A common-mode reference input pin is
provided to align the amplifier output common-mode
with the ADC input requirements. Use this device with
power supplies between 3.3 V and 5.0 V; dual-supply
operation is supported when required by the
application.
This level of performance is achieved at a very low
power level of 275 mW when a 5.0-V supply is used.
A power-down feature is also available for power
savings. The LMH3401 is fabricated in Texas
Instruments' advanced complementary BiCMOS
process and is available in a space-saving, 14-lead
UQFN package with a specified operating
temperature range of –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMH3401
UQFN (14)
2.50 mm × 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
LMH3401 Driving an ADC12J4000
Single-Ended,
50-W Source
VIN
12.5 W
50 W
12.5 W
LMH3401
CM
200 W
VCM
200 W
10 W VOUT+ RO
10 W VOUT- RO
Filter
AIN+
ADC
AIN- CM
Distortion Products vs Frequency
0
±20
±40
±60
±80
±100
±120
1
10 100
Frequency (MHz)
HD2
HD3
1000
C002
RL = 200 Ω, VOUT = 2 VPP
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



LMH3401
LMH3401
SBOS695A – AUGUST 2014 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics: VS = 5 V........................... 5
7.6 Electrical Characteristics: VS = 3.3 V........................ 7
7.7 Typical Characteristics .............................................. 9
8 Parameter Measurement Information ................ 17
8.1 Output Reference Points......................................... 17
8.2 ATE Testing and DC Measurements ...................... 17
8.3 Frequency Response .............................................. 17
8.4 S-Parameters .......................................................... 17
8.5 Frequency Response with Capacitive Load............ 17
8.6 Distortion ................................................................. 18
8.7 Noise Figure............................................................ 18
8.8 Pulse Response, Slew Rate, Overdrive Recovery . 18
8.9 Power Down............................................................ 18
8.10 VCM Frequency Response .................................... 18
8.11 Test Schematics.................................................... 19
9 Detailed Description ............................................ 21
9.1 Overview ................................................................. 21
9.2 Functional Block Diagram ....................................... 21
9.3 Feature Description................................................. 21
9.4 Device Functional Modes........................................ 26
10 Application and Implementation........................ 27
10.1 Application Information.......................................... 27
10.2 Typical Application ................................................ 29
10.3 Do's and Don'ts .................................................... 37
11 Power-Supply Recommendations ..................... 38
11.1 Supply Voltage ...................................................... 38
11.2 Single Supply ........................................................ 38
11.3 Split Supply ........................................................... 38
11.4 Supply Decoupling ................................................ 38
12 Layout................................................................... 39
12.1 Layout Guidelines ................................................. 39
12.2 Layout Example .................................................... 40
13 Device and Documentation Support ................. 42
13.1 Device Support...................................................... 42
13.2 Documentation Support ........................................ 42
13.3 Trademarks ........................................................... 42
13.4 Electrostatic Discharge Caution ............................ 42
13.5 Glossary ................................................................ 42
14 Mechanical, Packaging, and Orderable
Information ........................................................... 42
4 Revision History
Changes from Original (August 2014) to Revision A
Page
• Changed value of Supply Current bullet in Features ............................................................................................................. 1
• Changed VOUT value in front-page curve ............................................................................................................................... 1
• Changed LMH5401 row in Device Comparison Table ........................................................................................................... 3
• Updated ESD Ratings table to current standards ................................................................................................................. 4
• Changed Supply voltage parameter minimum specification in Recommended Operating Conditions table ......................... 4
• Changed test conditions of Output, Output voltage range high parameter from Output voltage range low to TA =
–40°C to 85°C......................................................................................................................................................................... 6
• Changed Power Down, Enable or disable voltage threshold parameter minimum specification in 5-V Electrical
Characteristics table ............................................................................................................................................................... 6
• Changed conditions of Figure 41 from differential input to single-ended input ................................................................... 15
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