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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)： | 13/16頁 |
| 文件大小： | 221K |
| 代理商： | LT5527EUF |
13
LT5527
5527f
APPLICATIU
W
U
U
L1 2
,
R
R
C6 7
,
R
R
L
X
IF
OUT
IF
IF
IF
OUT
IF
IF
1
3
=
=
=
ω
ω
ω
Compared to the lowpass/4:1 transformer matching tech-
nique, this network delivers approximately 0.8dB higher
conversion gain (since the IF transformer loss is elimi-
nated) and comparable noise figure and IIP3. At a
±
15%
offset from the IF center frequency, conversion gain and
noise figure degrade about 1dB. Beyond
±
15%, conver-
sion gain decreases gradually but noise figure increases
rapidly. IIP3 is less sensitive to bandwidth. Other than IF
bandwidth, the most significant difference is LO-IF leak-
age, which degrades to approximately –38dBm compared
to the superior performance realized with the lowpass/4:1
transformer matching.
Discrete IF balun element values for four common IF
frequencies are listed in Table 5. The corresponding
measured IF output return losses are shown in Figure 11.
The values listed in Table 5 differ from the calculated
values slightly due to circuit board and component
parasitics. Typical conversion gain, IIP3 and LO-IF leak-
age, versus RF input frequency, for all four IF frequency
examples is shown in Figure 12. Typical conversion gain,
IIP3 and noise figure versus IF output frequency for the
same circuits are shown in Figure 13.
Table 5. Discrete IF Balun Element Values (R
OUT
= 50
)
IF FREQUENCY
(MHz)
190
240
380
450
L1, L2
(nH)
120
100
56
47
C6, C7
(pF)
6.8
4.7
3
2.7
L3
(nH)
220
220
68
47
For fully differential IF architectures, the IF transformer
can be eliminated. An example is shown in Figure 14,
where the mixer’s IF output is matched directly into a SAW
filter. Supply voltage to the mixer’s IF pins is applied
IF FREQUENCY (MHz)
–30
I
–20
–10
0
–25
–15
–5
150
250
350
450
5527 F11
550
100
50
200
300
400
190MHz
240MHz
380MHz
450MHz
Figure 11. IF Output Return Losses with Discrete Balun Matching
RF INPUT FREQUENCY (MHz)
1700
G
C
L
14
12
18
16
22
20
26
24
2500
5527 F12
10
6
4
2
8
–30
–20
–10
0
–40
–50
–60
1900
2100
2300
2700
190IF
240IF
380IF
450IF
LOW SIDE LO (–3dBm)
T
A
= 25
°
C
IIP3
LO-IF
G
C
Figure 12. Conversion Gain, IIP3 and LO-IF Leakage vs RF Input
Frequency Using Discrete IF Balun Matching
IF OUTPUT FREQUENCY (MHz)
150
G
C
,
12
10
18
16
14
20
550
5527 F13
8
6
0
250
350
450
200
300
400
500
4
2
26
24
22
IIP3
G
C
190IF
240IF
380IF
450IF
LOW SIDE LO (–3dBm)
T
A
= 25
°
C
SSB NF
Figure 13. Conversion Gain, IIP3 and SSB NF vs IF Output
Frequency Using Discrete IF Balun Matching
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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 標準包裝: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 標準包裝: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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