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LT5579_15

Description
1.5GHz to 3.8GHz High Linearity Upconverting Mixer
File Size328KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LT5579_15 Overview

1.5GHz to 3.8GHz High Linearity Upconverting Mixer

LT5579
1.5GHz to 3.8GHz
High Linearity
Upconverting Mixer
FeaTures
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n
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DescripTion
The LT
®
5579 mixer is a high performance upconverting
mixer optimized for frequencies in the 1.5GHz to 3.8GHz
range. The single-ended LO input and RF output ports
simplify board layout and reduce system cost. The mixer
needs only –1dBm of LO power and the balanced design
results in low LO signal leakage to the RF output. At 2.6GHz
operation, the LT5579 provides high conversion gain of
1.3dB, high OIP3 of +26dBm and a low noise floor of
–157.5dBm/Hz at a –5dBm RF output signal level.
The LT5579 offers a high performance alternative to pas-
sive mixers. Unlike passive mixers, which have conversion
loss and require high LO drive levels, the LT5579 delivers
conversion gain at significantly lower LO input levels and
is less sensitive to LO power level variations. The lower
LO drive level requirements, combined with the excellent
LO leakage performance, translate into lower LO signal
contamination of the output signal.
High Output IP3: +27.3dBm at 2.14GHz
Low Noise Floor: –158dBm/Hz (P
OUT
= –5dBm)
High Conversion Gain: 2.6dB at 2.14GHz
Wide Frequency Range: 1.5GHz to 3.8GHz*
Low LO Leakage
Single-Ended RF and LO
Low LO Drive Level: –1dBm
Single 3.3V Supply
5mm × 5mm QFN24 Package
applicaTions
n
GSM/EDGE, W-CDMA, UMTS, LTE and TD-SCDMA
Basestations
n
2.6GHz and 3.5GHz WiMAX Basestations
n
2.4GHz ISM Band Transmitters
n
High Performance Transmitters
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.
*Operation over wider frequency range is possible with reduced performance.
Consult Linear Technology for information and assistance.
Typical applicaTion
Frequency Upconversion in 2.14GHz W-CDMA Transmitter
LO INPUT
–1dBm (TYP)
Gain, NF and OIP3 vs
RF Output Frequency
LT5579
LO
30
GAIN (dB), NF (dB), OIP3 (dBm)
25
20
15
10
5
0
1900
SSB NF
T
A
= 25°C
V
CC
= 3.3V
f
IF
= 240MHz
f
LO
= f
RF
+ f
IF
OIP3
GND
11
IF
INPUT MABAES0061
82pF
240MHz
4:1
33pF
40nH
IF
+
IF
40nH
11
RF
3.9nH
0.45pF
BIAS
RF
OUTPUT
2140MHz
GAIN
2000
2100
2200
2300
RF FREQUENCY (MHz)
2400
5579 TA01b
82pF
V
CC
1µF
100pF
5579 TA01a
1nF
V
CC
3.3V
5579fa

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