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參數(shù)資料
| 型號： | ADL5371ACPZ-R2 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 調(diào)制器/解調(diào)器 |
| 英文描述： | 700 MHz - 1300 MHz RF/MICROWAVE QUADRAPHASE MODULATOR |
| 封裝： | LEAD FREE, MO-220VGGD-2, LFCSP-24 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 930K |
| 代理商： | ADL5371ACPZ-R2 |
ADL5371
Rev. 0 | Page 14 of 20
Figure 30 shows an example of a third-order elliptical filter
with a 3 dB frequency of 3 MHz. Matching input and output
impedances makes the filter design easier, so the shunt resistor
chosen is 100 Ω, producing an ac swing of 1 V p-p differential.
RBIP
50
RBIN
50
93
92
19
20
IBBN
IBBP
AD9779
F-MOD
RBQN
50
RBQP
50
84
83
23
24
RSLI
100
RSLQ
100
OUT1_N
OUT1_P
OUT2_P
OUT2_N
QBBP
QBBN
LPI
2.7nH
LNI
2.7nH
1.1nF
C1I
1.1nF
C2I
LNQ
2.7nH
LPQ
2.7nH
1.1nF
C1Q
1.1nF
C2Q
06
51
0-
0
31
Figure 30. DAC Modulator Interface with 3 MHz Third-Order, Low-Pass Filter
USING THE AD9779 AUXILIARY DAC FOR CARRIER
FEEDTHROUGH NULLING
The AD9779 features an auxiliary DAC that can be used to
inject small currents into the differential outputs for each main
DAC channel. This feature can be used to produce the small
offset voltages necessary to null out the carrier feedthrough
from the modulator. Figure 31 shows the interface required
to use the auxiliary DACs. This adds four resistors to the
interface.
RBIP
50
RBIN
50
93
90
92
19
20
IBBN
IBBP
AD9779
F-MOD
RBQN
50
RBQP
50
84
87
89
83
86
23
24
RSLI
100
RSLQ
100
OUT1_N
AUX1_N
AUX2_N
OUT1_P
AUX1_P
OUT2_P
AUX2_P
OUT2_N
QBBP
QBBN
LPI
2.7nH
LNI
2.7nH
1.1nF
C1I
1.1nF
C2I
LNQ
2.7nH
LPQ
2.7nH
1.1nF
C1Q
1.1nF
C2Q
250
500
250
06
51
0-
03
2
Figure 31. DAC Modulator Interface with Auxiliary DAC Resistors
GSM OPERATION
Figure 32 shows the GSM/EDGE EVM and spectral mask
performance vs. output power for the ADL5371 at 940 MHz.
For a given LO amplitude, the performance is independent of
output power.
–30
–110
–6
6
25
0kH
z,
400k
Hz
,600kH
z,
A
N
D
1200kH
z
S
P
E
C
T
R
AL
M
A
S
K
(
d
B
c/
30kH
z)
6M
H
z
O
F
S
E
T
NO
IS
E
F
L
O
R
(d
Bc/
100k
Hz
)
OUTPUT POWER (dBm)
–40
–50
–60
–70
–80
–90
–100
4
2
0
–2
–4
4.0
0
PE
A
K
A
N
D
R
M
S
EV
M
(%
)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1200kHz
600kHz
400kHz
250kHz
EVM RMS (%)
6MHz NOISE FLOOR
EVM PEAK (%)
06
510-
033
Figure 32. GSM/EDGE (8 PSK) EVM and Spectral Performance vs. Channel
Power at 940 MHz vs. Output Power; LO Power = 0 dBm
Figure 33 shows the GSM/EDGE EVM and 6 MHz offset noise
vs. LO amplitude at 940 MHz with an output power of 5 dBm.
Increasing the LO drive level improves the noise performance
with minimal degradation in EVM performance.
–90
–130
–6
6
6M
H
zOFF
S
E
T
N
O
IS
E
F
L
OOR
(d
B
c/1
00
kH
z)
LO DRIVE (dBm)
–95
–100
–105
–110
–115
–120
–125
4
2
0
–2
–4
4.0
0
P
E
AK
AND
R
M
S
E
V
M
(%
)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
EVM PEAK (%)
EVM RMS (%)
6MHz NOISE FLOOR
06
51
0-
0
34
Figure 33. GSM/EDGE (8 PSK) EVM, Spectral Performance, and 6 MHz Noise
Floor vs. LO Power at 940 MHz; Output Power = 5 dBm
Figure 33 illustrates that an LO amplitude of 3 dBm provides
the ideal operating point for noise and EVM for a GSM/EDGE
signal at 940 MHz.
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| ADL5371ACPZ-R7 | 功能描述:IC MOD QUAD 500-1500 MHZ 24LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 調(diào)制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:調(diào)制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ADL5371ACPZ-WP | 制造商:Analog Devices 功能描述:QUADRATURE MOD 700MHZ 24LFCSP EP - Waffle Pack |
| ADL5371-EVALZ | 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk |
| ADL5372 | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MHz to 6 GHz Broadband Quadrature Modulator |
| ADL5372ACPZ-R2 | 制造商:Analog Devices 功能描述:1500 MHZ TO 2500 MHZ QUADRATURE MODULATOR - Tape and Reel |
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