AD8349ARE Analog Devices Inc, AD8349ARE Datasheet - Page 23

• Manufacturer Part Number: AD8349ARE
• Description: IC QUADRATURE MOD 700MHZ 16TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD8349ARE

• Rohs Status: RoHS non-compliant
• Function: Modulator
• Lo Frequency: 700MHz ~ 2.7GHz
• Rf Frequency: 700MHz ~ 2.7GHz
• P1db: 5.6dBm
• Noise Floor: -156dBm/Hz
• Output Power: 5.1dBm
• Current - Supply: 150mA
• Voltage - Supply: 4.75 V ~ 5.5 V
• Test Frequency: 2.14GHz
• Package / Case: 16-TSSOP (0.173", 4.40mm Width) Exposed pad

SOLDERING INFORMATION
The AD8349 is available in a 16-lead TSSOP package with an
exposed paddle. The exposed paddle must be soldered to the
exposed metal of a ground plane for a lowered thermal
impedance and reduced inductance to ground. This results in a
junction-to-air thermal impedance (θ
ground planes are present, the area under the exposed paddle
should be stitched together with vias.
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
ADI Model
ADF4111BRU
ADF4111BCP
ADF4112BRU
ADF4112BCP
ADF4117BRU
ADF4118BRU
Analog Devices also offers the ADF4360 fully integrated
synthesizer and VCO on a single chip that offers differential
outputs for driving the local oscillator input of the AD8349.
This means that the user can eliminate the use of the balun
necessary for the single-ended-to-differential conversion. The
ADF4360 comes as a family of chips with six operating
frequency ranges. One can be chosen depending on the local
oscillator frequency required. The user should be aware that
while the use of the integrated synthesizer might come at the
expense of slightly degraded noise performance from the
AD8349, it can be a much cheaper alternative to a separate PLL
and VCO solution. Figure 61 shows the options available.
Frequency F
(MHz)
1200
1200
3000
3000
1200
3000
IN
At 1 kHz Phase Noise
dBc/Hz, 200 kHz PFD
–78
–78
–86
–86
–87
–90
JA
) of 30°C/W. If multiple
Rev. A | Page 23 of 28
Table 5. ADF4360 Family Operating Frequencies
ADI Model
ADF4360-1
ADF4360-2
ADF4360-3
ADF4360-4
ADF4360-5
ADF4360-6
ADF4360-7
TRANSMIT DAC OPTIONS
The AD9777 recommended in the previous sections of this data
sheet is by no means the only DAC that can be used to drive the
AD8349. There are other DACs that are appropriate, depending
on the level of performance required. Table 6 lists the dual
Tx-DACs that ADI offers.
Table 6. ADI Dual Tx – DAC Selection Table
Part
AD9709
AD9761
AD9763
AD9765
AD9767
AD9773
AD9775
AD9777
Resolution (Bits)
8
10
10
12
14
12
14
16
Output Frequency Range (MHz)
2150/2450
1800/2150
1550/1950
1400/1800
1150/1400
1000/1250
Lower frequencies set by external L
Update Rate (MSPS Min)
125
40
125
125
125
160
160
160
AD8349