LMH6881 Datasheet, PDF (1/35 Pages) Texas Instruments – Small Signal Bandwidth: 2400 MHz

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LMH6881
SNOSC72F – JUNE 2012 – REVISED FEBRUARY 2015
LMH6881 DC to 2.4-GHz, High-Linearity, Programmable Differential Amplifier
1 Features
•1 Small Signal Bandwidth: 2400 MHz
• OIP3 at 100 MHz: 44 dBm
• HD3 at 100 MHz: −100 dBc
• Noise Figure: 9.7 dB
• Voltage Gain Range: 26 dB to 6 dB
• Voltage Gain Step Size: 0.25 dB
• Input Impedance: 100 Ω
• Parallel and Serial Gain Control
• Power Down Capability
2 Applications
• Oscilloscope Front End
• Spectrum Analyzer Gain Block
• Differential ADC Driver
• Differential Cable Driver
• IF/RF and Baseband Gain Blocks
• Medical Imaging
OIP3 vs Voltage Gain
50
45
40
35
30
25 f = 100 MHz
POUT= 4dBm / Tone
20
6 8 10 12 14 16 18 20 22 24 26
VOLTAGE GAIN (dB)
3 Description
The LMH6881 is a high-speed, high-performance,
programmable differential amplifier. With a bandwidth
of 2.4 GHz and high linearity of 44 dBm OIP3, the
LMH6881 is suitable for a wide variety of signal
conditioning applications.
The LMH6881 programmable differential amplifier
combines the best of both fully differential amplifiers
and variable-gain amplifiers. The device offers
superior noise and distortion performance over the
entire gain range without external resistors, enabling
the use of just one device and one design for multiple
applications requiring different gain settings.
The LMH6881 is an easy-to-use amplifier that can
replace both fully differential, fixed-gain amplifiers as
well as variable-gain amplifiers. The LMH6881
requires no external gain-setting components and
supports gain settings from 6 dB to 26 dB with small,
accurate 0.25-dB gain steps. With an input
impedance of 100 Ω, the LMH6881 is easy to drive
from a variety of sources such as mixers or filters.
The LMH6881 also supports 50-Ω single-ended
signal sources and supports both DC- and AC-
coupled applications.
Parallel gain control allows the LMH6881 to be
soldered down in a fixed-gain so that no control
circuit is required. If dynamic-gain control is desired,
the LMH6881 can be changed with SPI™ serial
commands or with the parallel pins.
The LMH6881 is fabricated in TI’s CBiCMOS8
proprietary complementary silicon germanium
process and is available in a space-saving, thermally
enhanced 24-pin lead quad WQFN package. The
same amplifier is offered in a dual package as the
LMH6882.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LMH6881
WQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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.