AD8312_05 AD [Analog Devices], AD8312_05 Datasheet - Page 18

• Manufacturer Part Number: AD8312_05
• Description: 50 MHz to 3.5 GHz, 45 dB RF Detector
• Manufacturer: AD [Analog Devices]

AD8312
Table 6. Evaluation Board Configuration Options
Component
VPOS, GND
C2
R1
R2, R4
C3
R3, R8, C4
R7
R5, R6
Function
Supply and Ground Vector Pins.
Power Supply Decoupling. The nominal supply decoupling consists of a 0.1 µF capacitor (C1).
Input Interface. The 52.3 Ω resistor in Position R1 combines with the AD8312’s internal input impedance
to give a broadband input impedance of around 50 Ω.
Slope Adjust. By installing resistors in R2 and R4, the nominal slope of 20 mV/dB can be changed. See the
Increasing the Logarithmic Slope section for more details.
Filter Capacitor. The response time of VOUT can be modified by placing a capacitor between CFLT (Pin 4)
and VOUT (Pin 2).
Output Interface. R3, R8, and C4 can be used to check the response of VOUT to capacitive and resistive
loading. R3/R8 can be used to attenuate VOUT.
VSET Interface. R7 can be used to reduce capacitive loading from transmission lines.
Alternate Interface. R5 and R6 allow for VOUT and VSET to be accessible from the edge connector, which
is only used for characterization.
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Default
Condition
Not Applicable
C2 = 0.1 µF
(Size 0603)
R1 = 52.3 Ω
(Size 0603)
R2 = Open
(Size 0402)
R4 = 0 Ω
(Size 0402)
C3 = Open
(Size 0603)
R3 = 0 Ω
(Size 0603)
R8 = C4 = Open
(Size 0402)
R7 = 0 Ω
(Size 0603)
R5 = R6 = Open
(Size 0402)