AD8314

Rev. B | Page 19 of 20

Figure 46. Layout of Component Side (MSOP)

Figure 47. Silkscreen of Component Side (MSOP)

Table 7. Evaluation Board Configuration Options

Component

Function

Default Condition

TP1, TP2

Supply and Ground Vector Pins.

Not Applicable

SW1

operating mode. In Position B, the ENBL pin is grounded, putting the device in power-down mode.

SW1 = A

R1, R2

Input Interface. The 52.3 Ω resistor in Position R2 combines with the AD8314’s internal input

impedance to give a broadband input impedance of around 50 Ω. A reactive match can be

implemented by replacing R2 with an inductor and R1 (0 Ω) with a capacitor. Note that the

AD8314’s RF input is internally ac-coupled.

R2 = 52.3 Ω (Size 0603)

R1 = 0 Ω (Size 0402)

R3, R4, C2,

R5, R6, C3

Output Interface. R4, C2, R6, and C3 can be used to check the response of V_UP and V_DN to

capacitive and resistive loading. R3/R4 and R5/R6 can be used to reduce the slope of V_UP

and V_DN.

R4 = C2 = R6 =

C3 = Open (Size 0603)

R3= R5 = 0 Ω (Size 0603)

C1, R9

Power Supply Decoupling. The nominal supply decoupling consists of a 0.1 μF capacitor (C1).

A series inductor or small resistor can be placed in R9 for additional decoupling.

C1 = 0.1 μF (Size 0603)

R9 = 0 Ω (Size 0603)

C4

Filter Capacitor. The response time of V_UP and V_DN can be modified by placing a capacitor

between FILTR and V_UP.

C4 = Open (Size 0603)

R7, R8

Slope Adjust. By installing resistors in R7 and R8, the nominal slope of 20 mV/dB can be

increased. See Increasing the Logarithmic Slope in Measurement Mode for more details.

R7 = 0 Ω (Size 0603)

R8 = Open (Size 0603)

LK1

Measurement/Controller Mode. LK1 shorts V_UP to VSET, placing the AD8314 in measurement

mode. Removing LK1 places the AD8314 in controller mode.

LK1 = Installed