ADRF6780ACPZN-R2 datasheet(34/35 Pages) AD

34 / 35 page

ADRF6780

Data Sheet

Rev. D | Page 34 of 35

Table 16. Evaluation Board Configuration Options

Component

Function

Default Condition

VPLO3.3V, VPDT5V, VPRF5V, VPBB3.3V, VPBI3.3V,

1P8V, AGND

Power supplies and ground

Not applicable

LOIN, LOIP, VDET, RFON, RFOP, BBIN, BBIP, BBQN,

BBQN, IFIN, IFIP, VATT

Data and clock

Not applicable

SCLK, SDIN, SENB, SDTO

SPI

Not applicable

R2 to R5

33 Ω series resistors for SPI pins

R2, R3, R4, R5 = 33 Ω (0402)

5V, 3.3V, 3.3V_6780, 1.8V, VDET, ALMB, VATT,

GND1 to GND2

Test points

Not applicable

PWDN

Power-down function

Apply 1.8 V on PWDN (Pin 2) jumper to power

down the device

R1, R9, R14, R15, R17 to R20, XR2, XR6

Shorts or power supply decoupling

resistors

R1, R9, R17, R18, R19 = 0 Ω (0402),

R8 = 5.1 kΩ (0402),

R15 = 100 kΩ (0402),

R14, R20 = 0 Ω (0402),

XR2 = 10 kΩ (0603),

XR6 = 80.6 Ω (1206)

R6, R7, R16, R22

Pull-up or pull-down resistors

R6, R7, R22 = 10 kΩ (0603),

R16 = 100 kΩ (0402)

C1 to C4, C6 to C11, C13 to C15, C17, C20, C22,

C23, C26, C28, C31, C33, C36, C38 to C40, C42

to C51, XC12, XC4 to XC8, C140, C141

The capacitors provide the required

decoupling of the supply related

pins

XC4, C45 = 10 µF (3216),

XC12 = 10 µF (0603),

C42, C44, C46, C48, C49,

C51 = 4.7 µF (0603),

C1, C2, C4, C8, C22, C28,

C39, C40 = 0.1 µF (0603),

XC5, XC6, XC7, XC8 = 0.1 µF (0402),

C3, C6, C10, C13, C20, C26,

C36, C38 = 4.7 nF (0402),

C43, C47, C50 = 1000 pF (0603),

C9, C11, C14, C15, C17, C23, C31, C33 = 33 pF (0402),

C7 = 10 pF (0402),

C140, C141 = 0.1 µF (0603)

R10 to R13

Remove resistors when using IF

inputs (IF mode)

R10, R11, R12, R13 = 0 Ω (0201)

R23 to R26

Resistors provide a broadband 50 Ω

termination for baseband input data

R23, R24, R25, R26 = 49.9 Ω (0402)

C5, C41

AC coupling capacitors

C5, C41 = 100 pF (0402)

C21

CS decoupling resistor

C21 = 100 pF (0402)

C12, C16, C18, C19, C24, C25, C27, C29, C30,

C32, C34, C35, C37, R21

Do not install (DNI)

C16, C24, C34, C35 = 0402,

C27, C37, R21 = 0603,

C12, C18, C19, C25 = 0402,

C29, C30, C32 = 0402

XP1

Programming header

Not applicable

XP2

Mini USB connector

Connect the mini USB cable to XP2 to interface

with the SPI

RSTB

Reset button

Click RSTB to reset the device

USB

Blue LED

LED is blue when the USB is connected to XP2, and

the PC and the ADRF6780 evaluation board is

powered on with a 5 V supply

XU1

Microcontroller

PIC18F24J50

Level shifter

FXL4TD245BQX

U3 to U5

3.3 V and 1.8 V regulators

ADM7170 (U3) = 1.8 V regulator,

ADM7172 (U4) = 3.3 V regulator,

ADM7172 (U5) = 3.3 V regulator for ADRF6780

AD5601 nanoDAC

Not applicable

DUT

ADRF6780, device under test

Not applicable

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