AS3932 datasheet(9/34 Pages) AMSCO

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Revision 1.7

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AS3932

Datasheet - Electrical Character i s t ics

I3CHOORC

Current Consumption in ON/

OFF mode with three active

channels and RC-oscillator as

RTC

11% Duty Cycle

1.7

µA

50% Duty Cycle

3.45

I3CHXT

Current Consumption in

standard listening mode with

three active channels and

crystal oscillator as RTC

6.5

8.9

µA

IDATA

Current Consumption in

Preamble detection / Pattern

correlation / Data receiving

mode (RC-oscillator)

With 125 kHz carrier frequency and 1kbps

data-rate. No load on the output pins.

8.3

µA

Input Sensitivity

SENS

Input Sensitivity on all

channels

With 125 kHz carrier frequency, chip in default

mode, 4 half bits burst + 4 symbols preamble

and single preamble detection

100

µVrms

Channel Settling Time

TSAMP

Amplifier settling time

250

µs

Crystal Oscillator

FXTAL

Frequency

Crystal dependent

32.768

kHz

TXTAL

Start-up Time

Crystal dependent

IXTAL

Current consumption

µA

External Clock Source

IEXTCL

Current consumption

µA

RC Oscillator

FRCNCAL

Frequency

If no calibration is performed

32.768

kHz

FRCCAL32

Frequency

If calibration with 32.768 kHz reference signal

is performed

32.768

34.5

kHz

FRCCALMAX

Frequency

Maximum achievable frequency after

calibration

kHz

FRCCALMIN

Frequency

Minimum achievable frequency after calibration

kHz

TCALRC

Calibration time

Periods of

reference

clock

IRC

Current consumption

200

Table 5. Electrical System Specifications

Symbol

Parameter

Conditions

Min

Typ

Max

Units

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