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參數資料
| 型號： | ADL5372 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 300 MHz to 1000 MHz Quadrature Modulator |
| 中文描述： | 300 MHz到1000 MHz的正交調制器 |
| 文件頁數： | 14/20頁 |
| 文件大小： | 904K |
| 代理商： | ADL5372 |
ADL5370
Rev. 0 | Page 14 of 20
0
RBIP
50
RBIN
50
93
92
19
20
IBBN
IBBP
AD9779
ADL5370
RBQN
50
RBQP
50
83
84
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
Figure 32. 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 33 shows the interface required
to utilize the auxiliary DACs. This adds four resistors to the
interface.
0
RBIP
50
RBIN
50
93
90
92
19
20
IBBN
IBBP
AD9779
ADL5370
RBQN
50
RBQP
50
83
84
87
89
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
500
500
500
250
250
250
Figure 33. DAC Modulator Interface with Auxiliary DAC Resistors
GSM OPERATION
Figure 34 shows the GSM EVM and spectral mask performance
vs. output power for the ADL5370 at 450 MHz. For a given LO
amplitude, the performance is independent of output power.
–35
–56
–49
–42
–63
–70
–77
–84
–91
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
6
7
0
S
R
OUTPUT POWER (dBm)
250kHz
400kHz
600kHz
EVM
RMS
(%)
EVM
PK
(%)
1200kHz
Figure 34. GSM EVM and Spectral Performance vs. Channel Power at
450 MHz vs. Output Power; LO Power = 0 dBm
Figure 35 shows the GSM EVM, spectral mask performance
and 6 MHz offset noise vs. LO amplitude at 450 MHz with an
output power of 6 dBm. Increasing the LO drive level improves
the noise performance but degrades EVM performance.
–35
–56
–49
–42
–63
–70
–77
–84
–112
–105
–98
–91
3.1
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
–6
–4
–2
LO AMPLITUDE (dBm)
0
2
4
6
0
6
2
S
R
250kHz
400kHz
600kHz
1200kHz
EVM
RMS
(%)
EVM
PK
(%)
6 MHz OFFSET NOISE
Figure 35. GSM EVM, Spectral Performance, and 6 MHz Noise Floor vs.
LO Power at 450 MHz; Output Power = 6 dBm
Figure 35 illustrates that an LO amplitude of 0 dBm provides
the ideal operating point for noise and EVM for a GSM signal
at 450 MHz.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADL5372ACPZ-R2 | 制造商:Analog Devices 功能描述:1500 MHZ TO 2500 MHZ QUADRATURE MODULATOR - Tape and Reel |
| ADL5372ACPZ-R21 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1500 MHz to 2500 MHz Quadrature Modulator |
| ADL5372ACPZ-R7 | 功能描述:IC QUADRA MOD 1.5/2.5GHZ 24LFCSP RoHS:是 類別:RF/IF 和 RFID >> RF 調制器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:調制器 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) |
| ADL5372ACPZ-R71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1500 MHz to 2500 MHz Quadrature Modulator |
| ADL5372ACPZ-WP | 制造商:Analog Devices 功能描述:QUADRATURE MOD 700MHZ 24LFCSP EP - Waffle Pack |
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