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LT5525_15 Datasheet, PDF (1/12 Pages) Linear Technology – High Linearity, Low Power Downconverting Mixer | |||
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FEATURES
â Wide Input Frequency Range: 0.8GHz to 2.5GHz*
â Broadband LO and IF Operation
â High Input IP3: +17.6dBm at 1900MHz
â Typical Conversion Gain: â1.9dB at 1900MHz
â High LO-RF and LO-IF Isolation
â SSB Noise Figure: 15.1dB at 1900MHz
â Single-Ended 50⦠RF and LO Interface
â Integrated LO Buffer: â5dBm Drive Level
â Low Supply Current: 28mA Typ
â Enable Function
â Single 5V Supply
â 16-Lead QFN (4mm à 4mm) Package
U
APPLICATIO S
â Point-to-Point Data Communication Systems
â Wireless Infrastructure
â High Performance Radios
â 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 50â¦
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 50⦠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 â
140MHz
IF+
150nH 4:1
VGA
ADC
1.2pF
IF â
150nH
LT5525
GND
LO+ LOâ
LO INPUT
â5dBm
5525 TA01
IF Output Power and IM3 vs
RF Input Power (Two Input Tones)
0
â10
â20
â30 POUT
â40
â50
â60
â70
â80
â90 IM3
â100
â20
TA = 25°C
fRF = 1900MHz
fLO = 1760MHz
fIF = 140MHz
PLO = â5dBm
â15
â10
â5
0
RF INPUT POWER (dBm/TONE)
5525 TA02
5525f
1
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