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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.

LMH3402

SBOS744 – JUNE 2016

LMH3402 Dual, 7-GHz, Low-Noise, Low-Power, Fully Differential Amplifier

1

1 Features

1

•

3-dB Bandwidth: 7 GHz

•

Excellent Linearity Performance: DC to 2 GHz

•

Selectable Gains: 6 dB, 14 dB, 17 dB (Differential)

•

Channel Gain Matching DC to 1 GHz: < 0.05 dB

•

Channel Phase Matching DC to 1 GHz: < 0.7°

•

Crosstalk at 1 GHz: –70 dBc

•

Slew Rate: 17,500 V/µs

•

Low Harmonic Distortion

–

500 MHz: HD2 at –78 dBc, HD3 at –78 dBc

–

1 GHz: HD2 at –70 dBc, HD3 at –72 dBc

–

2 GHz: HD2 at –51 dBc, HD3 at –47 dBc

•

Low Intermodulation Distortion

–

500 MHz: IMD2 at –85 dBc, IMD3 at –88 dBc

–

1 GHz: IMD2 at –70 dBc, IMD3 at –71 dBc

–

2 GHz: IMD2 at –51 dBc, IMD3 at –51 dBc

•

Input Voltage Noise: 1.3 nV/

√Hz

•

Supports Single- and Dual-Supply Operation

•

Power Consumption: 55 mA per Channel

•

Power-Down Feature

2 Applications

•

GSPS ADC Drivers

•

IQ Demodulation Receivers

•

ADC Drivers for Ultra Wideband or Narrowband

Data Acquisition

•

Single-Ended to Differential Signal Converters

•

DAC Buffers

•

IF, RF, and Baseband Gain Blocks

•

SAW Filter Buffers and Drivers

•

Balun Replacement, DC to 2 GHz

•

Level Shifters

3 Description

The LMH3402 is a very high-performance, dual-

channel, 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 use differential-

to-differential (Diff-Diff) or single-ended-to-differential

(SE-Diff) conversion when driving an analog-to-digital

converter (ADC). The LMH3402 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 with three internal gains of 6 dB, 14

dB, and 17 dB. The LMH3402 can be used as a very

wideband

ADC

driver,

and

also

for

SE-Diff

conversions in the signal chain without external

baluns. The LMH3402 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 voltage 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 saving power. 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 LMH3402 is fabricated using 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

LMH3402

VQFN (24)

4.0 mm × 4.0 mm

(1) For all available packages, see the package option addendum

at the end of the datasheet.

Frequency Response