ADF7010BRU データシートの表示（PDF） - Analog Devices

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ADF7010BRU

High Performance ISM Band ASK/FSK/GFSK Transmitter IC

Analog Devices 

ADF7010

Pin No.

15

16

17

18

19

20

21

22

23

24

Mnemonic

OSC1

VCOGND

TEST

DVDD

RFGND

RFOUT

AGND

VCOIN

CVCO

CREG

PIN FUNCTION DESCRIPTIONS (continued)

Function

Oscillator Pin. For use with crystal reference only. This is three-stated when an external reference oscillator

is used.

Voltage Controlled Oscillator Ground

Input to the RF fractional-N divider. This pin allows the user to connect an external VCO to the part.

Disabling the internal VCO activates this pin. If the internal VCO is used, this pin should be grounded.

Positive Supply for the Digital Circuitry. This must be between 2.3 V and 3.6 V. Decoupling capacitors

to the analog ground plane should be placed as close as possible to this pin.

Ground for Output Stage of Transmitter

The modulated signal is available at this pin. Output power levels are from –16 dBm to +12 dBm. The

output should be impedance matched to the desired load using suitable components. See the Output RF

Stage section.

Ground Pin for the RF Analog Circuitry

The tuning voltage on this pin determines the output frequency of the Voltage Controlled Oscillator

E (VCO). The higher the tuning voltage the higher the output frequency.

A 0.22 mF capacitor should be added to reduce noise on VCO bias lines. Tied to CREG pin.

A 2.2 mF capacitor should be added at CREG to reduce regulator noise and improve stability. A reduced

OBSOLET capacitor will improve regulator power-on time but may cause higher spurious components.

–6–

REV. 0

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