LT5519
0.7GHz to 1.4GHz
High Linearity
Upconverting Mixer
FEATURES
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DESCRIPTIO
Wide RF Frequency Range: 0.7GHz to 1.4GHz
17.1dBm Typical Input IP3 at 1GHz
On-Chip RF Output Transformer
On-Chip 50鈩?Matched LO and RF Ports
Single-Ended LO and RF Operation
Integrated LO Buffer: 鈥?dBm Drive Level
Low LO to RF Leakage: 鈥?44dBm Typical
Noise Figure: 13.6dB
Wide IF Frequency Range: 1MHz to 400MHz
Enable Function with Low Off-State Leakage Current
Single 5V Supply
Small 16-Lead QFN Plastic Package
The LT
廬
5519 mixer is designed to meet the high linearity
requirements of wireless and cable infrastructure trans-
mission systems. A high speed, internally 50鈩?matched,
LO amplifier drives a double-balanced mixer core, allow-
ing the use of a low power, single-ended LO source. An RF
output transformer is integrated, thus eliminating the
need for external matching components at the RF output,
while reducing system cost, component count, board area
and system-level variations. The IF port can be easily
matched to a broad range of frequencies for use in many
different applications.
The LT5519 mixer delivers +17.1dBm typical input 3rd
order intercept point at 1GHz with IF input signal levels of
鈥?0dBm. The input 1dB compression point is typically
+5.5dBm. The IC requires only a single 5V supply.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Wireless Infrastructure
Cable Downlink Infrastructure
Point-to-Point and Point-to-Multipoint Data
Communications
High Linearity Frequency Conversion
TYPICAL APPLICATIO
5V
DC
1碌F
1000pF
39nH
10
EN
BPF
4:1
IF
33pF
IF
鈥?/div>
220pF
100鈩?/div>
+
V
CC1
V
CC2
V
CC3
P
OUT
, IM3, IM2 (dBm/TONE)
220pF
100鈩?/div>
BIAS
LT5519
10pF
+
RF
BPF
PA
RF
鈥?/div>
GND
5pF
(OPTIONAL)
LO INPUT
鈥?dBm
LO
+
85鈩?/div>
5pF
LO
鈥?/div>
5519 F01a
Figure 1. Frequency Conversion in Wireless Infrastructure Transmitter
5519f
U
RF Output Power, IM3 and IM2
vs IF Input Power (Two Input Tones)
0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?6
鈥?2
鈥?
0
鈥?
IF INPUT POWER (dBm/TONE)
4
5519 F01b
U
U
P
OUT
f
RF
= 1000MHz
P
LO
= 鈥?dBm
f
LO
= 1140MHz
f
IF1
= 140MHz
f
IF2
= 141MHz
T
A
= 25擄C
IM3
IM2
1
LT5519EUF 產(chǎn)品屬性
LT5519
91
RF/IF 和 RFID
RF 混頻器
LT5519
通用
700MHz ~ 1.4GHz
1
-0.6dB
13.6dB
升頻器
70mA
4.5 V ~ 5.25 V
管件
16-WQFN 裸露焊盤
16-QFN（4x4）
LT5519EUF相關(guān)型號PDF文件下載
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