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參數(shù)資料
| 型號： | LT5527EUF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 400MHz to 3.7GHz High Signal Level Downconverting Mixer |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16 |
| 封裝： | 4 X 4 MM, PLASTIC, MO-220WGGC, QFN-16 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT5527EUF |
9
LT5527
5527f
APPLICATIU
Introduction
The LT5527 consists of a high linearity double-balanced
mixer, RF buffer amplifier, high speed limiting LO buffer
amplifier and bias/enable circuits. The RF and LO inputs
are both single ended. The IF output is differential. Low
side or high side LO injection can be used.
Two evaluation circuits are available. The standard evalu-
ation circuit, shown in Figure 1, incorporates transformer-
based IF matching and is intended for applications that
require the lowest LO-IF leakage levels and the widest IF
bandwidth. The second evaluation circuit, shown in Fig-
ure 2, replaces the IF transformer with a discrete IF balun
for reduced solution cost and size. The discrete IF balun
delivers comparable noise figure and linearity, higher
conversion gain, but degraded LO-IF leakage and reduced
IF bandwidth.
W
U
U
RF Input Port
The mixer’s RF input, shown in Figure 3, consists of an
integrated transformer and a high linearity differential
amplifier. The primary terminals of the transformer are
connected to the RF input pin (Pin 3) and ground. The
secondary side of the transformer is internally connected
to the amplifier’s differential inputs.
One terminal of the transformer’s primary is internally
grounded. If the RF source has DC voltage present, then a
coupling capacitor must be used in series with the RF input
pin.
The RF input is internally matched from 1.7GHz to 3GHz,
requiring no external components over this frequency
range. The input return loss, shown in Figure 4a, is typi-
cally 10dB at the band edges. The input match at the lower
band edge can be optimized with a series 2.7pF capacitor
at Pin 3, which improves the 1.7GHz return loss to greater
than 20dB. Likewise, the 2.7GHz match can be improved
to greater than 30dB with a series 1.5nH inductor. A series
1.5nH/2.7pF network will simultaneously optimize the lower
and upper band edges and expand the RF input bandwidth
to 1.1GHz-3.3GHz. Measured RF input return losses for
these three cases are also plotted in Figure 4a.
Alternatively, the input match can be shifted down, as low
as 400MHz or up to 3700MHz, by adding a shunt capacitor
(C5) to the RF input. A 450MHz input match is realized with
C5 = 12pF, located 4.5mm away from Pin 3 on the evalu-
ation board’s 50
input transmission line. A 900MHz in-
put match requires C5 = 3.9pF, located at 1.3mm. A
3500MHz input match is realized with C5 = 0.5pF, located
RF
IN
Z
=
50
L = L (mm)
C5
RF
5527 F03
EXTERNAL MATCHING
FOR LOW BAND OR
HIGH BAND ONLY
TO
MIXER
3
Figure 3. RF Input Schematic
Figure 4. RF Input Return Loss With
and Without External Matching
RF FREQUENCY (GHz)
0.2
–30
R
–25
–20
–15
–10
1.2
2.2
3.2
4.2
5527 F04b
–5
0
0.7
1.7
2.7
3.7
NO EXTERNAL
MATCHING
900MHz
C5 = 3.9pF
L = 1.3mm
450MHz
C5 = 12pF
L = 4.5mm
3.5GHz
C5 = 0.5pF
L = 4.5mm
(4b) Series Shunt Matching
(4a) Series Reactance Matching
FREQUENCY (GHz)
0.2
–30
R
–25
–20
–15
–10
1.2
2.2
3.2
4.2
5527 F04a
–5
0
0.7
1.7
2.7
3.7
SERIES 1.5nH
SERIES 2.7pF
NO EXTERNAL
MATCHING
SERIES 1.5nH
SERIES 2.7pF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT5527EUF#PBF | 功能描述:IC MIXER DOWNCONV LP 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5527 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤 封裝/外殼:12-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| LT5527EUF#TR | 制造商:Linear Technology 功能描述:Up/Down Conv Mixer 5V 3.7GHz 16-Pin QFN EP T/R |
| LT5527EUF#TRPBF | 功能描述:IC MIXER DOWNCONV LP 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5527 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤 封裝/外殼:12-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| LT5527EUFPBF | 制造商:Linear Technology 功能描述:Up/Down Converter Mixer 5V 3.7GHz QFN16 |
| LT5527EUF-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400MHz to 3.7GHz 5V High Signal Level Downconverting Mixer |
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