LTC5540 [Linear]
0.6GHz to 1.3GHz High Dynamic Range Downconverting Mixer; 0.6GHz到1.3GHz的高动态范围下变频混频器
| 型号： | LTC5540 |
| 厂家： | 
Linear |
| 描述： | 0.6GHz to 1.3GHz High Dynamic Range Downconverting Mixer |
| 文件： | 总1页 (文件大小：50K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Electrical Specifications Subject to Change
LTC5540
0.6GHz to 1.3GHz
High Dynamic Range
Downconverting Mixer
FEATURES
DESCRIPTION
The LTC®5540 is part of a family of high dynamic range
passive downconverting mixers covering the 600MHz
to 4GHz frequency range. The LTC5540 is optimized for
0.6GHz to 1.3GHz RF applications. The LO frequency
mustfallwithinthe0.7GHzto1.2GHzrangeforoptimum
performance.AtypicalapplicationisaLTEorGSMreceiver
with a 700MHz to 915MHz RF input and high-side LO.
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Conversion Gain: 7.9dB at 900MHz
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IIP3: 25.9dBm at 900MHz
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Noise Figure: 9.9dB at 900MHz
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17.7dB NF Under 5dBm Blocking
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High Input P1dB
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3.3V Supply, 640mW Power Consumption
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Shutdown Pin
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50Ω Single-Ended RF and LO Inputs
The LTC5540 is designed for 3.3V operation, however; the
IF amplifier can be powered by 5V for the highest P1dB.
An integrated SPDT LO switch with fast switching accepts
two active LO signals, while providing high isolation.
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LO Inputs 50Ω Matched when Shutdown
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High Isolation LO Switch
0dBm LO Drive Level
High LO-RF and LO-IF Isolation
Small Solution Size
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n
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The LTC5540’s high conversion gain and high dynamic
range enable the use of lossy IF filters in high-selectivity
receiver designs, while minimizing the total solution cost,
board space and system-level variation.
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20-Lead (5mm × 5mm) QFN package
APPLICATIONS
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Wireless Infrastructure Receivers
High Dynamic Range Downconverting Mixer Family
(LTE, GSM, CDMA)
PART#
RF RANGE
LO RANGE
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High Dynamic Range Downmixer Applications
LTC5540
LTC5541
LTC5542
LTC5543
600MHz –1.3GHz
1.3GHz – 2.3GHz
1.6GHz – 2.7GHz
2.3GHz – 4GHz
700MHz – 1.2GHz
1.4GHz – 2.0GHz
1.7GHz – 2.5GHz
2.4GHz – 3.6GHz
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Wideband Receiver
Wideband Conversion Gain, IIP3
and NF vs RF Input Frequency
190MHz
SAW
190MHz
BPF
1nF
V
IF
AMP
CCIF
1nF
150nH
16
15
28
27
ADC
3.3V or 5V
150nH
22pF
1μF
14
13
12
11
10
26
25
24
23
22
+
–
1.5pF
IF
IF
100pF
C
T
IIP3
T
= +25°C
LO2
LO1
A
LTC5540
SYNTH 2
IF
F
F
= 190MHz
IF
LO
5.6pF
= F + F
RF
IF
RF
700MHz
TO
RF
NF
ALTERNATE LO FOR
FREQUENCY-HOPPING
LNA
LO
IMAGE
BPF
915MHz
9
8
7
21
20
19
100pF
G
C
SHDN
BIAS
SYNTH 1
SHDN
(0V/3.3V)
V
V
V
CC3
LOSEL
CC2
CC1
LO
1090MHz
6
18
600
700
800
900
1000
V
CC
3.3V
LO SELECT
(0V/3.3V)
1μF
RF FREQUENCY (MHz)
22pF
5540 TA01
5540 TA01a
5540p
LINEAR TECHNOLOGY CONFIDENTIAL
1
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