LMH3404 Datasheet, PDF (1/8 Pages) Texas Instruments – Dual, 7-GHz, Low-Noise, Low-Power, Fully-Differential Amplifier

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LMH3404
SBOS739 – MAY 2016
LMH3404 Dual, 7-GHz, Low-Noise, Low-Power, Fully-Differential Amplifier
1 Features
•1 3-dB Bandwidth: 7 GHz
• Excellent Linearity Performance: DC to 2 GHz
• Fixed Differential-to-Differential Gain: 20 dB
• Channel Gain Matching: 0.04 dB
• Channel Phase Matching: TBD
• Crosstalk at 1 GHz: –60 dBc
• Slew Rate: 17,500 V/µs
• Low Harmonic Distortion
(2-V_PP, 200-Ω, Diff-Diff Configuration):
– 500 MHz: HD2 at –78 dBc, HD3 at –78 dBc
– 1 GHz: HD2 at –65 dBc, HD3 at –72 dBc
– 2 GHz: HD2 at –55 dBc, HD3 at –40 dBc
• Low Intermodulation Distortion
(2-V_PP, 200-Ω, Diff-Diff Configuration):
– 500 MHz: IMD2 at –85 dBc, IMD3 at –88 dBc
– 1 GHz: IMD2 at –65 dBc, IMD3 at –71 dBc
– 2 GHz: IMD2 at –46 dBc, IMD3 at –60 dBc
• Input Voltage Noise: 1.3 nV/√Hz
• Supports Single- and Dual-Supply Operation
• Power Consumption: 56 mA per Channel
• Power-Down Feature
2 Applications
• GSPS ADC Drivers
• IQ Demodulation Receiver Dual ADC Drivers
• ADC Drivers for Ultra Wide-Band or Narrow-Band
Data Acquisition
• Single-Ended to Differential Signal Conversions
• DAC Buffers
• IF, RF, and Baseband Gain Blocks
• SAW Filter Buffers and Drivers
• Balun Replacement DC to 2 GHz
• Level Shifters
3 Description
The LMH3404 is a very high-performance, dual,
differential amplifier optimized for radio frequency
(RF), intermediate frequency (IF), or high-speed time-
domain applications. The device is ideal for dc- or ac-
coupled applications that use differential-to-differential
(Diff-Diff) or single-ended-to-differential (SE-Diff)
conversion when driving an analog-to-digital
converter (ADC). The LMH3404 generates very low
levels of second- and third-order distortion when
operating in SE-Diff or Diff-Diff mode.
The device has unprecedented usable bandwidth
from dc to 2 GHz. The LMH3404 can be used as a
very wide-band ADC driver and also for SE-Diff
conversions in the signal chain without external
baluns. The performance is ideal for a wide range of
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. Power supplies between
3.15 V and 5.25 V can be selected and dual-supply
operation is supported when required by the
application. A power-down feature is also available
for power saving.
This level of performance is achieved at a very low
power level of 280 mW per channel when a 5.0-V
supply is used. The device is fabricated in Texas
Instruments' advanced complementary BiCMOS
process and is available in a space-saving, 24-pin,
VQFN package for higher performance.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE
LMH3404
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
LMH3404 Differential Small-Signal
Frequency Response
30
20
10
0
-10
-20
-30
-40
10M
100M
1G
10G
Frequency (Hz)
D001
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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.