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參數(shù)資料
| 型號： | LT5521EUF |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Very High Linearity Active Mixer |
| 中文描述： | 很高的線性度有源混頻器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 283K |
| 代理商： | LT5521EUF |
13
LT5521
5521f
APPLICATIU
W
U
U
Table 6. Matching Values Using M/A-COM ETC1.6-4-2-3
Output Transformer
f
OUT
L1, L2
2.4GHz
0nH
2.2GHz
1nH
2.0GHz
2.7nH
1.7GHz
4.7nH
1.3GHz
10nH
1.0GHz
10nH
C3
82pF
82pF
82pF
82pF
82pF
3.9pF
C12
82pF
82pF
82pF
82pF
82pF
1nF
f (10dB RL)
450MHz
430MHz
400MHz
400MHz
400MHz
500MHz
For applications with LO and output frequencies below
1GHz, the M/A-COM MABAES0054 is recommended for
the output component T2. This transformer maintains
better low frequency output symmetry. Table 7 lists com-
ponents necessary for a 750MHz output match using the
M/A-COM MABAES0054.
Table 7. Matching Values Using M/A-COM MABAES0054
Output Transformer
f
OUT
L1, L2
750MHz
33nH
C3
82pF
C12
1nF
f (10dB RL)
500MHz
Hybrid baluns provide a low cost alternative for differen-
tial to single-ended conversion. The critical performance
parameters of conversion gain, IIP3, noise figure and LO
suppression are largely unaffected by these transform-
ers. However, their limited bandwidth and reduced sym-
metry outside the frequency of operation degrades the
suppression of higher order LO harmonics, particularly
2xLO. Murata LBD21 series hybrid balun transformers,
for ex
ample, can be used for output frequencies as low as
840MHz and as high as 2.4GHz.
Figure 10. Output Return Loss vs Frequency
FREQUENCY (GHz)
0.7
–10
–5
1GHz
5
2.2
5521 F10
–15
–20
1.2
1.7
–25
–30
0
R
2GHz
Johanson Technology supplies the 3700BL15B100S hy-
brid balun for use between 3.4GHz and 4GHz. With addi-
tional matching, this transformer can be used for
applications between 3.3GHz and 3.7GHz. Example LT5521
performance is shown in Figure 11.
FREQUENCY (GHz)
3.2
10
8
6
4
2
0
–2
–4
22
IIP3
NF
HS
HS
HS
G
C
20
18
16
14
12
10
8
3.5
3.7
5521 F11
3.3
3.4
3.6
3.8
C
I
LS
LS
LS
T
A
= 25
°
C
f
IF
= 300MHz
Figure 11. LT5521 Performance for an Application Tuned to
3.5GHz with Low Side (LS) and High Side (HS) LO Injection
LO Interface
The LO input pin is internally matched to 50
. It has an
internal DC bias of 960mV. External AC coupling is re-
quired. Figure 12 shows a simplified schematic of the LO
input. Overdriving the LO input will dramatically reduce
the performance of the mixer. The LO input power should
not exceed +1dBm for normal operation. Select C1 (Figure
12) only large enough to achieve the desired LO input
return loss. This reduces external low frequency signal
amplification through the LO buffer.
For applications with LO frequency in the range of 2.1GHz
to 2.4GHz, the LT5521 achieves improved distortion and
Figure 12. Simplified LO Input Circuit
15
V
CC
8
C1
5521 F12
60
LT5521
LO
IN
50
60
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LT5521EUF#PBF | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 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） |
| LT5521EUF#TR | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:否 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 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） |
| LT5521EUF#TRPBF | 功能描述:IC MIXER HI LIN 3.7GHZ 16-QFN RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:LT5521 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） |
| LT5521EUFPBF | 制造商:Linear Technology 功能描述:Upconverter Mixer,LT5521 3.7GHz QFN |
| LT5522 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator |
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