AD8302-EVAL Analog Devices, AD8302-EVAL Datasheet - Page 21

• Manufacturer Part Number: AD8302-EVAL
• Description: LF.2.7 GHz RF/IF Gain and Phase Detector
• Manufacturer: Analog Devices

Component
P1
R1, R2
R3
R5, R6, R9
C3, C7, R4
C1, C5
C2, C8
C4, C6
SW1
SW2
INPA
INPB
GND
VP
R1
R2
VP
C1
C4
C6
C5
C7
C3
Function
Power Supply and Ground Connector: Pin 2 VPOS, and Pins 1 and 3 Ground.
Input termination: Provide Termination for Input Sources.
VREF Output Load: This load is optional and is meant to allow
the user to simulate their circuit loading of the device.
Snubbing Resistor
Supply Decoupling
Input AC-Coupling Capacitors
Video Filtering: C2 and C8 limit the video bandwidth of the Gain and Phase
output respectively.
Offset Feedback: These set the high-pass corner of the offset cancellation loop,
and thus with the input AC-coupling capacitors the minimum operating frequency. C4 = C6 = 1 nF (Size 0603)
GSET Signal Source: When SW1 is in the position shown, the device is in gain
measure mode, when switched it operates in comparator mode and a signal
must be applied to GSET.
PSET signal source: When SW2 is in the position shown, the device is in phase
measure mode, when switched it operates in comparator mode and a signal
must be applied to PSET.
R4
1
2
3
4
5
6
7
COMM
INPA
OFSA
VPOS
OFSB
INPB
COMM
AD8302
VMAG
MSET
VPHS
MFLT
VREF
PSET
PFLT
14
13
12
11
10
9
8
Table III. Evaluation Board Configuration Options
R8
R7
C8
SW2
C2
R3
R6
R5
SW1
R9
GAIN
VREF
PSET
PHASE
GSET
Table II. P1 Pin Allocations
1
2
3
Common
VPOS
Common
R3 = 1 kΩ (Size 0603)
C2 = C8 = Open (Size 0603)
Default Condition
Not Applicable
R1 = R2 = 52.3 Ω (Size 0402)
R5 = R6 = 0 Ω (Size 0603)
R9 = 0 Ω (Size 0603)
C3 = 100 pF (Size 0603)
C7 = 0.1 µF (Size 0603)
R4 = 0 Ω (Size 0603)
C1 = C5 = 1 nF (Size 0603)
SW1 = Installed
SW1 = Installed
AD8302