REV. C
AD8316
–17–
Table II. Evaluation Board Configuration Options
Component
Function
Default Condition
TP1, TP2
SW1
Supply and Ground Vector Pins.
Device Enable. When in Position A, the ENBL pin is connected to VPOS and
the AD8316 is in operating mode. In Position B, the ENBL pin is grounded,
putting the device into power-down mode.
Band Select. When in Position A (OUT1), the BSEL pin is connected to VPOS
and the AD8316 OUT1 is in operation mode. In Position B (OUT2), the
BSEL pin is grounded and the AD8316 OUT2 is in operation while OUT1 pin
is shut down.
Input Interface. The 52.3
resistor in Position R2 combines with the AD8316’s
internal input impedance to provide a broadband input impedance of around
50
. A reactive match can be implemented by replacing R2 with an inductor
and R1 (0
) with a capacitor. In addition, the RF microstrip line has been
provided with a clean mask ground plane to provide additional matching. Note
that the AD8316’s RF input is internally ac-coupled.
Output Interface. R4 and C2, R9 and C7 can be used to check the response
capacitive and resistive loading, respectively. R3/R4 and R12/R9 can be used to
reduce the slope of OUT1 and OUT2.
Power Supply Decoupling. The nominal supply decoupling consists of
a 0.1
μ
F capacitor.
Filter Capacitors/Resistors. The response time of OUT1, OUT2 can be modified
by placing the capacitors between FLT1, FLT2 and resistors R10, R11
to ground.
Measurement Mode. A quasi-measurement mode can be implemented by
installing LK1 and LK2 (connecting an inverted OUT1 or OUT2 to VSET) to
yield the nominal relationship between RFIN and VSET. In this mode, a large
capacitor (0.01
μ
F or greater) must be installed in C4 and C6 and a 0
resistors to ground in R10 and R11. To select OUT1 or OUT2, SW3 must
be in the OUT1 position or the OUT2 position, respectively.
Measurement Mode Output Select. When in measurement mode, output 1
or output 2 can be selected by positioning SW3 to the OUT1 position or the
OUT2 position, respectively.
Not Applicable
SW1 = A
SW2
SW2 = OUT1
R1, R2
R2 = 52.3
(Size 0603)
R1 = 0
(Size 0402)
R3, R4, R12,
R9, C2, C7
R4 = C2 = Open (Size 0603)
R9 = C7 = Open (Size 0603)
R3 = R12 = 0
(Size 0603)
C1 = C5 = 0.1
μ
F (Size 0603)
C1, C5
C4, C6, R10,
R11
C4 = C6 = Open (Size 0603)
R10 = R11 = Open (Size 0603)
LK1, LK2
LK1, LK2 = Installed
SW3
SW3 = OUT1