ADRF6614ACPZ-R7 datasheet(39/61 Pages) AD

39 / 61 page

Data Sheet

ADRF6614

Rev. 0 | Page 39 of 61

BASIC CONNECTIONS BY PIN DESCRIPTION

Table 23. Basic Connections

Pin No.

Mnemonic

Description

Basic Connection

5 V Power

Decouple to GND with a 10 µF, a 0.1 µF, and a 10 pF

capacitor as close to the pin as possible.

VCC1

5 V VCO supply

VCC2

5 V supply for SPI port

20, 41

VCC3, VCC11

5 V biases for IF Channel 2 and IF Channel 1

27, 28, 29, 32, 33, 34

VCC4, VCC5, VCC6,

VCC8, VCC9, VCC10

5 V supplies for mixer LO amplifier

VCC7

5 V supply for mixer LO divider chain

VCC12

5 V supply for internal PLL

Internal LDO Nodes

Decouple to GND with a 10 µF and a 100 pF

capacitor, as close to the pin as possible.

8, 9

DECL1, DECL2

VCO LDO outputs

10, 11, 12

DECL3, DECL4, DECL5

External decoupling for VCO circuitry

LDO1

External decoupling for internal 2.5 V SPI LDO

LDO2

External decoupling for internal 3.3 V

PLL/divider LDO

LDO3

External decoupling for internal 2.5 V PLL LDO

LDO4

External decoupling for internal 3.3 V PLL LDO

GND

Connect directly to the PCB ground through a low

impedance connection.

GND

External loop filter ground

3, 6

GND

Common ground for external loop filter

24, 37

GND

IF stage, Channel 2 and Channel 1 ground

GND

External charge pump ground

SPI

SDIO

SPI port data input/output

SCLK

SPI port clock

SPI port chip select

RF, Mixer, IF Path

4, 5

EXTVCOIN+,

EXTVCOIN−

External VCO or LO inputs

DC block with 100 pF capacitors.

13, 14

LOOUT+, LOOUT−

Differential LO outputs

DC block with 100 pF capacitors.

22, 23

IFOUT2+, IFOUT2−

Channel 2 differential IF outputs

Bias to 5 V supply with 330 nH inductors and dc

block with 150 pF capacitors.

RFBCT2

Internal mixer bias control for Channel 2 RF

input

Decouple to GND with a 10 pF and a 10 nF

capacitor, as close to the pin as possible.

RFIN2

Channel 2 single-ended RF input

DC block with a 22 pF capacitor.

RFBCT1

Internal mixer bias control for Channel 1 RF

input

Decouple to GND with a 10 pF and a 10 nF

capacitor, as close to the pin as possible.

RFIN1

Channel 1 single-ended RF input

DC block with a 22 pF capacitor.

38, 39

IFOUT1−, IFOUT1+

Channel 1 differential IF outputs

Bias to 5 V supply with 330 nH inductors and dc

block with 150 pF capacitors.

PLL/VCO

VCOVTUNE

Control voltage for internal VCO

Output from external loop filter.

REFIN

External reference for internal PLL

CPOUT

Charge pump output

Input to external loop filter.

Other

MUXOUT

Output for various internal analog signals,

including PLL lock detect and voltage

proportional to absolute temperature (VPTAT

)

Can be read directly from the pin; the user must be

careful of loading effects; not a low impedance output.

21, 40

DNC

Do not connect

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