LT5526EUF 查看數據表（PDF） - Linear Technology
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LT5526EUF Datasheet PDF : 16 Pages
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FEATURES
■ Operation up to 2GHz
■ Broadband RF, LO and IF Operation
■ High Input IP3: +16.5dBm at 900MHz
■ Typical Conversion Gain: 0.6dB at 900MHz
■ SSB Noise Figure: 11dB at 900MHz
■ On-Chip 50Ω LO Match
■ Integrated LO Buffer: –5dBm Drive Level
■ High LO-RF and LO-IF Isolation
■ 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
■ Cable Downlink Infrastructure
■ High Linearity Receiver Applications
LT5526
High Linearity, Low Power
Downconverting Mixer
DESCRIPTIO
The LT®5526 is a low power broadband mixer optimized
for high linearity applications such as point-to-point data
transmission, cable infrastructure and wireless infrastruc-
ture systems. The device includes an internally matched
high speed LO amplifier driving a double-balanced active
mixer core. An integrated RF buffer amplifier provides
excellent LO-RF isolation. The RF and IF ports can be easily
matched across a broad range of frequencies for use in a
wide variety of applications.
The LT5526 offers a high performance alternative to
passive mixers. Unlike passive mixers which have conver-
sion loss and require high LO drive levels, the LT5526
delivers conversion gain 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.
TYPICAL APPLICATIO
High Signal Level Frequency Downconversion
900MHz
LNA
900MHz
EN
BIAS
VCC2 VCC1
RF+
IF+
RF –
IF –
VCC
5V DC
140MHz
VGA
ADC
LT5526
GND
LO+ LO–
LO INPUT
–5dBm
5526 TA01
IF Output Power and IM3 vs
RF Input Power (Two Input Tones)
0
–10
–20
POUT
–30
–40
–50
–60
–70
–80 IM3
–90
–100
–20
TA = 25°C
fIF = 140MHz
fRF = 900MHz
fLO = 760MHz
PLO = –5dBm
–15
–10
–5
0
RF INPUT POWER (dBm/TONE)
5526 TA02
5526f
1
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