ISM 868 MHz, 433 MHz and 315 MHz FSK Receiver Cell – Preliminary Data Sheet

ASCell3912

Rev. A, February 2000

Page 10 of 14

Austria Mikro Systeme International AG

2.3 Receiver Operation

TA = 23 °C, VDD, AVDD = 3.6 V, unless specified otherwise. Devive functional for TA= -40 to

+85 °C.

Symbol

Parameter

Conditions / Notes

Min

Typ

Max

Units

Carrier Frequency

Depends on different external

crystals.

315.000

433.920

868.300

MHz

MHz

MHz

Input impedance

Capacitive part t.b.d.

200~ 400

Ω

?F

Nominal FSK frequency devi a-

tion

315, 433.92, 868.3MHz

61

69

kHz

Crystal oscillator (XOSC) fre-

quency

315,000 MHz: max +/- 50ppm

433.920 MHz: max +/- 50ppm

868.300 MHz: max +/-25ppm

19,6875

13.5600

13.5672

MHz

MHz

MHz

Crystal oscillator (XOSC) fre-

quency tolerance

315,000 MHz: (-40~+85 °C),

433.920 MHz: (-40~+85 °C),

868.300 MHz: (-40~+85 °C).

50

50

25

ppm

ppm

ppm

Gross Data Rate

Including protocol.

18.235

kbps

1)

Receiver sensitivity

-10 °C<TA<+70 °C

-96

-100

dBm

Temperature sensitivity reduc-

tion

-40<TA<-10 °C. or

+70>TA>+85 °C.

4

dB

caused by frequency offset

@maximum receiver sensitiv-

ity reduction @ 44 kHz offset

7

dB

Sensitivity reduction caused

by LNA gain switching

10

dB

2)

Blocking immunity

200 kHz – 1 MHz

Without external filter.

0

dB

2)

Blocking immunity

1-10 MHz

Without external filter

21

dB

2)

Blocking immunity @

>10 MHz

Without external filter

63

dB

LC+ and LC- nodes

-28

dBm

1)

Standard Receive Quality (SRQ): Message reception successfully finished after <80 ms in 80% of all transmission

trails.

2)

CW blocking signal relative to applied useful signal with –94dBm power level and SRQ.

Measured without frequency offset and at +25 °C

Receiver Timing

Symbol

Parameter

Conditions / Notes

Min

Typ

Max

Units

Time to received FSK data

Configured for fast response

(receiver sleep time = 0)

27

80

ms

Time to received FSK data

Using low idle duty cycle the

(receiver sleep time >0)

40

92

ms

RX switch off time

Timeout for comfort functions

30

ms