LMH6882SQESLASHNOPB中文资料德州仪器数据手册PDF规格书

1 Features

1• Small Signal Bandwidth: 2400 MHz

• OIP3 @ 100 MHz: 42 dBm

• HD3 @ 100 MHz: −100 dBc

• Noise Figure: 9.7 dB

• Voltage Gain: 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

• Microwave Backhaul Radio Receiver

• Zero IF Sampling

• In-Phase/Quadrature (I/Q) Sampling

• Medical Imaging

• RF/IF and Baseband Gain Blocks

• Differential Cable Driver

3 Description

The LMH6882 is a high-speed, high-performance

programmable differential amplifier. With a bandwidth of 2.4 GHz and high linearity of 42 dBm OIP3, the

LMH6882 is suitable for a wide variety of signal

conditioning applications.

The LMH6882 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 LMH6882 is an easy-to-use amplifier that can

replace both fully differential, fixed-gain amplifiers as

well as variable-gain amplifiers. The LMH6882 requires no external gain-setting components and

supports gain settings from 6 dB to 26 dB with small,

accurate 0.25-dB gain steps. As shown in the

adjacent voltage gain chart the gain steps are very

accurate over the entire gain range. With an input

impedance of 100 Ω, the LMH6882 is easy to drive

from a variety of sources such as mixers or filters.

The LMH6882 also supports 50-Ω single-ended

signal sources and supports DC- and AC-coupled

applications.

Parallel gain control allows the LMH6882 to be

soldered down in a fixed-gain so that no control

circuit is required. If dynamic gain control is desired,

the LMH6882 can be changed with SPI™ serial

commands or with the parallel pins.

The LMH6882 is fabricated in TI’s CBiCMOS8

proprietary complementary silicon germanium

process and is available in a space-saving, thermally

enhanced 36-pin WQFN package. The same

amplifier is offered in a single package as the

LMH6881.