LT5525EUF データシートの表示（PDF） - Linear Technology

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LT5525EUF

High Linearity, Low Power Downconverting Mixer

Linear Technology 

FEATURES

■ Wide Input Frequency Range: 0.8GHz to 2.5GHz*

■ Broadband LO and IF Operation

■ High Input IP3: +17.6dBm at 1900MHz

■ Typical Conversion Gain: –1.9dB at 1900MHz

■ High LO-RF and LO-IF Isolation

■ SSB Noise Figure: 15.1dB at 1900MHz

■ Single-Ended 50Ω RF and LO Interface

■ Integrated LO Buffer: –5dBm Drive Level

■ Low Supply Current: 28mA Typ

■ Enable Function

■ Single 5V Supply

■ 16-Lead QFN (4mm × 4mm) Package

U

APPLICATIO S

■ Point-to-Point Data Communication Systems

■ Wireless Infrastructure

■ High Performance Radios

■ High Linearity Receiver Applications

LT5525

High Linearity, Low Power

Downconverting Mixer

DESCRIPTIO

The LT®5525 is a low power broadband mixer optimized

for high linearity applications such as point-to-point data

transmission, high performance radios and wireless infra-

structure systems. The device includes an internally 50Ω

matched high speed LO amplifier driving a double-bal-

anced active mixer core. An integrated RF buffer amplifier

provides excellent LO-RF isolation. The RF input balun and

all associated 50Ω matching components are integrated.

The IF ports can be easily matched across a broad range

of frequencies for use in a wide variety of applications.

The LT5525 offers a high performance alternative to

passive mixers. Unlike passive mixers, which require high

LO drive levels, the LT5525 operates at significantly lower

LO input levels and is much less sensitive to LO power

level variations.

, LTC and LT are registered trademarks of Linear Technology Corporation.

*Operation over a wider frequency range is achievable with reduced performance.

Consult factory for more information.

TYPICAL APPLICATIO

High Signal Level Frequency Downconversion

EN

BIAS

VCC2 VCC1

0.01µF

100pF

VCC

5V DC

1900MHz

LNA

1900MHz

RF+

RF –

140MHz

IF+

150nH 4:1

VGA

ADC

1.2pF

IF –

150nH

LT5525

GND

LO+ LO–

LO INPUT

–5dBm

5525 TA01

IF Output Power and IM3 vs

RF Input Power (Two Input Tones)

0

–10

–20

–30 POUT

–40

–50

–60

–70

–80

–90 IM3

–100

–20

TA = 25°C

fRF = 1900MHz

fLO = 1760MHz

fIF = 140MHz

PLO = –5dBm

–15

–10

–5

0

RF INPUT POWER (dBm/TONE)

5525 TA02

5525f

1

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