ADL5370

Rev. 0 | Page 15 of 20

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. ADI PLL Selection Table

Part

Phase Noise @ 1 kHz Offset

and 200 kHz PFD (dBc/Hz)

ADF4110

550

−91 @ 540 MHz

ADF4111

1200

−87@ 900 MHz

ADF4112

3000

−90 @ 900 MHz

ADF4113

4000

−91 @ 900 MHz

ADF4116

550

−89 @ 540 MHz

ADF4117

1200

−87 @ 900 MHz

ADF4118

3000

−90 @ 900 MHz

The ADF4360 comes as a family of chips, with nine operating

frequency ranges. One is chosen, 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 ADL5370, it can be a cheaper alternative

to a separate PLL and VCO solution. Table 5 shows the options

available.

Table 5. ADF4360 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

ADL5370. There are other appropriate DACs, depending on the

level of performance required. Table 6 lists the dual Tx-DACs

offered by Analog Devices.

Table 6. Analog Devices Dual Tx—DAC Selection Table

Part

Resolution (Bits)

Update Rate (MSPS Min)

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

All DACs listed have nominal bias levels of 0.5 V and use the same

simple DAC-modulator interface that is shown in Figure 31.

MODULATOR/DEMODULATOR OPTIONS

Table 7 lists other Analog Devices modulators and demodulators.

Table 7. Modulator/Demodulator Options

Part

Mod/Demod

Frequency

Range (MHz)

Comments

AD8345

Mod

140 to 1000

AD8346

Mod

800 to 2500

AD8349

Mod

700 to 2700

ADL5390

Mod

20 to 2400

External quadrature

ADL5385

Mod

50 to 2200

ADL5371

Mod

700 to 1300

ADL5372

Mod

1600 to 2400

ADL5373

Mod

2300 to 3000

ADL5374

Mod

3000 to 4000

AD8347

Demod

800 to 2700

AD8348

Demod

50 to 1000

AD8340

Vector mod

700 to 1000

AD8341

Vector mod

1500 to 2400