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ADL5375
Rev. 0 | Page 26 of 32
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
–6
–4
–2
0
2
4
6
LO DRIVE (dBm)
C
0
SYMBOL EVM
COMPOSITE EVM
Table 5. ADF4360-x Family Operating Frequencies
Part
Output Frequency Range (MHz)
ADF4360-0
2400 to 2725
ADF4360-1
2050 to 2450
ADF4360-2
1850 to 2150
ADF4360-3
1600 to 1950
ADF4360-4
1450 to 1750
ADF4360-5
1200 to 1400
ADF4360-6
1050 to 1250
ADF4360-7
350 to 1800
ADF4360-8
65 to 400
TRANSMIT DAC OPTIONS
The
AD9779
recommended in the previous sections of this data
sheet is by no means the only DAC that can be used to drive the
ADL5375. There are other appropriate DACs, depending on the
level of performance required. Table 6 lists the dual TxDAC
offered by Analog Devices.
Table 6. Dual TxDAC Selection
Part
Resolution (Bits)
Update Rate (MSPS Minimum)
AD9709
8
125
AD9761
10
40
AD9763
10
125
AD9765
12
125
AD9767
14
125
AD9773
12
160
AD9775
14
160
AD9777
16
160
AD9776
12
1000
AD9778
14
1000
AD9779
16
1000
Figure 69. ADL5375-15 Single Carrier W-CDMA Composite and Symbol EVM
vs. LO Drive at 2140 MHz; Output Power = 10 dBm
The EVM exhibits moderate improvements with an increase in
the LO drive.
LO GENERATION USING PLLS
Analog Devices has a line of PLLs that can be used for generating
the LO signal. Table 4 lists the PLLs together with their maximum
frequency and phase noise performance.
Table 4. Analog Devices PLL Selection
Part
ADF4110
ADF4111
ADF4112
ADF4113
ADF4116
ADF4117
ADF4118
Frequency, f
IN
(MHz)
550
1200
3000
4000
550
1200
3000
Phase Noise @ 1 kHz Offset
and 200 kHz PFD (dBc/Hz)
91 @ 540 MHz
87 @ 900 MHz
90 @ 900 MHz
91 @ 900 MHz
89 @ 540 MHz
87 @ 900 MHz
90 @ 900 MHz
All DACs listed have nominal bias levels of 0.5 V and use the
same simple DAC modulator interface that is shown in Figure 60.
MODULATOR/DEMODULATOR OPTIONS
Table 7 lists other Analog Devices modulators and demodulators.
Table 7. Modulator/Demodulator Options
Modulator/
Demodulator
AD8345
Modulator
AD8346
Modulator
AD8349
Modulator
ADL5390
Modulator
The
ADF4360-x
comes as a family of chips with nine operating
frequency ranges. Choose chips depending on the local
oscillator frequency required. While the use of the integrated
synthesizer may come at the expense of slightly degraded noise
performance from the ADL5375, it can be a cheaper alternative
to a separate PLL and VCO solution. Table 5 shows the options
available.
Part No.
Frequency
Range (MHz)
140 to 1000
800 to 2500
700 to 2700
20 to 2400
Comments
External
quadrature
ADL5385
ADL5370
ADL5371
ADL5372
ADL5373
ADL5374
AD8347
AD8348
ADL5387
AD8340
AD8341
Modulator
Modulator
Modulator
Modulator
Modulator
Modulator
Demodulator
Demodulator
Demodulator
Vector modulator
Vector modulator
50 to 2200
300 to 1000
500 to 1500
1500 to 2500
2300 to 3000
3000 to 4000
800 to 2700
50 to 1000
50 to 2000
700 to 1000
1500 to 2400