LMH3401 Datasheet, PDF (1/48 Pages) Texas Instruments – LMH3401 7-GHz, Ultra-Wideband, Fixed-Gain, Fully-Differential Amplifier

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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 (R_S = 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
V_IN
12.5 W
50 W
12.5 W
LMH3401
CM
200 W
V_CM
200 W
10 W V_OUT+ ^RO
10 W ^VOUT- RO
Filter
A_IN+
ADC
A_{IN- CM}
Distortion Products vs Frequency
0
±20
±40
±60
±80
±100
±120
1
10
100
Frequency (MHz)
HD2
HD3
1000
C002
R_L = 200 Ω, V_OUT = 2 V_PP
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.