Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

ADL5370 Datasheet(PDF) 14 Page - Analog Devices

Part No. ADL5370
Description  300 MHz to 1000 MHz Quadrature Modulator
Download  20 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADL5370 Datasheet(HTML) 14 Page - Analog Devices

Back Button ADL5370 Datasheet HTML 10Page - Analog Devices ADL5370 Datasheet HTML 11Page - Analog Devices ADL5370 Datasheet HTML 12Page - Analog Devices ADL5370 Datasheet HTML 13Page - Analog Devices ADL5370 Datasheet HTML 14Page - Analog Devices ADL5370 Datasheet HTML 15Page - Analog Devices ADL5370 Datasheet HTML 16Page - Analog Devices ADL5370 Datasheet HTML 17Page - Analog Devices ADL5370 Datasheet HTML 18Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 20 page
background image
ADL5370
Rev. 0 | Page 14 of 20
RBIP
50Ω
RBIN
50Ω
93
92
19
20
IBBN
IBBP
AD9779
ADL5370
RBQN
50Ω
RBQP
50Ω
84
83
23
24
RSLI
100Ω
RSLQ
100Ω
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.
RBIP
50Ω
RBIN
50Ω
93
90
92
19
20
IBBN
IBBP
AD9779
ADL5370
RBQN
50Ω
RBQP
50Ω
84
87
89
83
86
23
24
RSLI
100Ω
RSLQ
100Ω
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
250Ω
500Ω
500Ω
500Ω
500Ω
250Ω
250Ω
250Ω
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
012345
67
OUTPUT POWER (dBm)
250kHz
400kHz
600kHz
EVMRMS (%)
EVMPK (%)
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
0246
LO AMPLITUDE (dBm)
250kHz
400kHz
600kHz
1200kHz
EVMRMS (%)
EVMPK (%)
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.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn