AD831APZ Analog Devices Inc, AD831APZ Datasheet - Page 20

• Manufacturer Part Number: AD831APZ
• Description: IC MIXER DWNCONV LOW DIST 20PLCC
• Manufacturer: Analog Devices Inc
• Series: AD831r

Specifications of AD831APZ

• Rf Type: HF, VHF
• Frequency: 500MHz
• Number Of Mixers: 1
• Gain: 0dB
• Noise Figure: 14dB
• Secondary Attributes: Down Converter
• Current - Supply: 125mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Package / Case: 20-LCC (J-Lead)
• Supply Voltage Range: ± 4.5V To ± 5.5V
• Rf Ic Case Style: PLCC
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Termination Type: SMD
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADL5350
Figure 63 depicts a crossover filter network approach to provide
isolation between the RF and IF ports for a downconverting
application. The crossover network essentially provides a high-
pass filter to allow the RF signal to pass to the RF/IF node (Pin 1
and Pin 8), while presenting a low-pass filter (which is actually
a band-pass filter when considering the dc blocking capacitor,
C
passed to the desired IF load.
When designing the RF port and IF port networks, it is
important to remember that the networks share a common
node (the RF/IF pins). In addition, the opposing network presents
some loading impedance to the target network being designed.
AC
). This allows the difference component (f
Figure 63. 3.3 GHz to 3.8 GHz RF Downconversion Schematic
ALL
INDUCTORS
ARE 0302CS
SERIES FROM
COILCRAFT
RF
IF
3.5nH
L1
1.8pF
C2
1.2pF
C1
RF/IF
RF/IF
8
1
L2
1.5nH
C
100pF
AC
GND2
NC
ADL5350
7
2
4.7µF
VPOS
LOIN
LO
3V
6
3
100pF
3.8nH
2.2nH
100pF
GND1
RF
NC
5
4
− f
LO
) to be
Rev. 0 | Page 20 of 24
Classic audio crossover filter design techniques can be applied
to help derive component values. However, some caution must be
applied when selecting component values. At high RF frequencies,
the board parasitics can significantly influence the final optimum
inductor and capacitor component selections. Some empirical
testing may be necessary to optimize the RF and IF port filter
networks. The performance of the circuit depicted in Figure 63
is provided in Figure 64.
30
25
20
15
10
3300
5
0
Figure 64. Measured Performance for Circuit in Figure 63
Using Low-Side LO Injection and 800 MHz IF
3400
RF FREQUENCY (MHz)
3500
IP1dB
IIP3
3600
LOSS
3700
3800
14
12
10
8
6
4
2