ADRF6510

Rev. 0 | Page 25 of 28

EVALUATION BOARD CONFIGURATION OPTIONS

Table 5 lists the components of the main section of the ADRF6510 evaluation board.

Table 5.

Components

Function

Default Conditions

C1, C2, C4, C5, C11, C12,

C15, C16, L1, L2, R2

Power supply and ground decoupling. Nominal supply decoupling

consists of a 0.1 μF capacitor to ground.

C1, C2 = 10 μF (Size 0603)

C4, C5, C11, C12, C15, C16 = 0.1 μF

(Size 0603)

L1, L2 = 33 μH (Size 0805)

R2 = 1 kΩ (Size 0402)

T1, T2, C3, C6, C7 to C10,

R15 to R18, R31, R32,

R43 to R58

Input interface. Input SMAs INM1_SE_P and INP2_SE_P are used to drive

the baluns in a single-ended fashion. The default configuration of the

evaluation board is for single-ended operation.

T1 and T2 are 8:1 impedance ratio baluns to transform a 50 Ω, single-ended

input into a 400 Ω balanced differential signal. R31, R32, and R47 to R50

are populated for appropriate balun interface. R51 to R58 are provided

for generic placement of matching components. C3 and C6 are balun

decoupling capacitors.

R15 to R18 and R43 to R46 can be populated with 0 Ω, and the balun

interfacing resistors can be removed to bypass T1 and T2 for differential

interfacing. C7 to C10 can be used for ac coupling with differential

interfacing.

T1, T2 = ADT8-1T+ (Mini-Circuits)

C3, C6 = 0.1 μF (Size 0402)

C7 to C10 = 100 nF (Size 0402)

R15 to R18, R43 to R46, R51, R52,

R55, R56 = open (Size 0402)

R31, R32, R47 to R50, R53, R54, R57,

R58 = 0 Ω (Size 0402)

T3, T4, C19 to C24,

R7 to R14, R19 to R24,

R35 to R42

Output interface. Output SMAs OPP1_SE_P and OPM2_SE_P are used to

drive the baluns in a single-ended fashion. The default configuration of

the evaluation board is for single-ended operation.

T3 and T4 are 8:1 impedance ratio baluns to transform a 50 Ω, single-ended

output into a 400 Ω balanced differential load. R19, R20, R35, R36, R41, and

R42 are populated for appropriate balun interface. R7 to R14 are provided

for generic placement of matching components. R7 to R10 are set to 300 Ω

to present a 1 kΩ load (with the balun used) at the DUT output.

C19 to C22 are used for ac coupling when differential outputs are used.

C23 and C24 are balun decoupling capacitors. R21 to R24 and R37 to R40

can be populated with 0 Ω, and the balun interfacing resistors can be

removed to bypass T3 and T4 for differential interfacing.

T3, T4 = ADT8-1T+ (Mini-Circuits)

C19 to C22 = 100 nF (Size 0402)

C23, C24 = 0.1 μF (Size 0402)

R7 to R10 = 300 Ω (Size 0402)

R11 to R14 = open

R19, R20, R35, R36, R41, R42 = 0 Ω

(Size 0402)

R21 to R24, R37 to R40 = open

(Size 0402)

P2

Enable interface. The ADRF6510 is powered up by applying a logic high

voltage to the ENBL pin (Jumper P2 is connected to VPS).

P2 = installed for enable

C27, C28, R1, R29, R30,

R33, R34

Serial interface control. The digital interface sets the corner frequency of

the device using the serial interface via the LE, CLK, DATA, and SDO pins.

R1 = 10 kΩ (Size 0402)

C27, C28 = 330 pF (Size 0402)

R29, R30 = 100 Ω (Size 0402)

R33, R34 = 0 Ω (Size 0402)

P4, C13, C14, R3

DC offset correction loop compensation. The dc offset correction loop is

enabled (low) with Jumper P4. When enabled, the capacitors are connected

to circuit common. The high-pass corner frequency is expressed as follows:

P4 = installed

C13, C14 = 1000 pF (Size 0402)

R3 = 10 kΩ (Size 0402)

C18, R6

Output common-mode setpoint. The output common-mode voltage can

be set externally when applied to the VOCM pin. If the VOCM pin is left

open, the output common-mode voltage defaults to VPS/2.

C18 = 0.1 μF (Size 0402)

R6 = 0 Ω (Size 0402)

C17, R5

Analog gain control. 0 V to 2 V, 30 mV/dB gain scaling.

C17 = 0.1 μF (Size 0402)

R5 = 0 Ω (Size 0402)

P3, R4

Front-end 6 dB or 12 dB gain switch. Pull low for 6 dB; pull high for 12 dB.

P3 = installed

R4 = 10 kΩ (Size 0402)