AS3902 查看數據表（PDF） - austriamicrosystems AG

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AS3902

ISM 433 MHz ASK Transmitter

austriamicrosystems AG 

ISM 433 MHz ASK Transmitter – Preliminary Data Sheet

AS3902

2.3 ASK Operation

TAMB = 23 °C, VDD = 3.0 V, unless specified otherwise.

Symbol Parameter

Conditions

fRF

Transmit frequency

fXTAL = 13.560 MHz

(Europe)

POUT,H

POUT,L

POUT 3rd

Available output power

Leakage output power

Radiated third harmonic

output power

In 2 kΩ , TXD = “H“

In 2 kΩ , TXD = “L“

Antenna attenuation

> 20 dB

PSP

fCLK

tSWM

Spurious power

µC clock frequency

Minimum switch close

time

In distance of fCLK or

fXTAL from carrier.

tSTUP

tDRON

Start up time

Until clock output

Driving amplifier turn on

delay

RASK

ASK data rate range

For a RF packet duty

cycle ≥45 %.

tr,f

Carrier rise / fall time

Min Typ Max

433,920

Units Note

MHz 1)

0

dBm 2)

-inf. -80 dBm

-30

dBC

-25

dBC 3)

3.390

1

MHz

ms

2

ms

21

µs

0

32 kb/s 4)

8

µs

Note:

1)

2)

3)

4)

XTAL tolerances will slightly change the typical transmit frequency.

Output power depends on load impedance, differential output current is typical 0.7 mArms. Maximum differential voltage swing

is typical 4 VPP (1.4 VRMS). Actual E.I.R.P. depends on antenna efficiency.

Measurement bandwidth (according to EN 300 220-1) see also figure 10. Actual radiated spurious power depends on antenna

efficentcy and antenna selectivity. Measured with loop antenna (demo board).

Guaranteed, higher data rates possible.

Rev. A7, December 2000

Page 7 of 14

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