鈩?/div>
Single-Ended RF and LO Ports
Wide RF Frequency Range: 400MHz to 3.7GHz*
High Input IP3: 24.5dBm at 900MHz
23.5dBm at 1900MHz
Conversion Gain: 3.2dB at 900MHz
2.3dB at 1900MHz
Integrated LO Buffer: Low LO Drive Level
High LO-RF and LO-IF Isolation
Low Noise Figure: 11.6dB at 900MHz
12.5dB at 1900MHz
Very Few External Components
Enable Function
4.5V to 5.25V Supply Voltage Range
16-Lead (4mm
脳
4mm) QFN Package
The LT
廬
5527 active mixer is optimized for high linearity,
wide dynamic range downconverter applications. The IC
includes a high speed differential LO buffer amplifier
driving a double-balanced mixer. Broadband, integrated
transformers on the RF and LO inputs provide single-
ended 50鈩?interfaces. The differential IF output allows
convenient interfacing to differential IF filters and amplifi-
ers, or is easily matched to drive 50鈩?single-ended, with
or without an external transformer.
The RF input is internally matched to 50鈩?from 1.7GHz to
3GHz, and the LO input is internally matched to 50鈩?from
1.2GHz to 5GHz. The frequency range of both ports is
easily extended with simple external matching. The IF
output is partially matched and usable for IF frequencies
up to 600MHz.
The LT5527鈥檚 high level of integration minimizes the total
solution cost, board space and system-level variation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Operation over a wider frequency range is possible with reduced performance. Consult factory for
information and assistance.
APPLICATIO S
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Cellular, WCDMA, TD-SCDMA and UMTS
Infrastructure
GSM900/GSM1800/GSM1900 Infrastructure
900MHz/2.4GHz/3.5GHz WLAN
MMDS, WiMAX
High Linearity Downmixer Applications
TYPICAL APPLICATIO
LO INPUT
鈥?dBm (TYP)
LT5527
High Signal Level Downmixer for Multi-Carrier Wireless Infrastructure
1.9GHz Conversion Gain, IIP3, SSB NF and
LO-RF Leakage vs LO Power
24
22 IIP3
20
18
16
14
12 SSB NF
10
8
6
4 G
C
2
鈥?
LO-RF
鈥?0
鈥?5
鈥?0
IF = 240MHz
LOW SIDE LO 鈥?5
T
A
= 25擄C
鈥?0
V
CC
= 5V
鈥?5
鈥?0
鈥?5
鈥?0
鈥?5
鈥?0
鈥?5
鈥?
鈥?
鈥?
鈥?
LO POWER (dBm)
1
3
5527 TA01b
G
C
, SSB NF (dB), IIP3 (dBm)
4.7pF
IF
+
100nH
1nF
220nH
RF
INPUT
RF
BIAS
GND
EN
V
CC2
V
CC1
1nF
IF
鈥?/div>
100nH
5V
1碌F
5527 TA01a
4.7pF
IF
OUTPUT
240MHz
U
LO-RF LEAKAGE (dBm)
5527f
U
U
1
LTC5530相關型號PDF文件下載
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型號
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描述
廠商
下載
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