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S2-LPS датащи(PDF) 12 Page - STMicroelectronics

номер детали S2-LPS
подробное описание детали  Ultra-low power, high performance, sub-1 GHz transceiver
PDF  73 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

S2-LPS датащи(HTML) 12 Page - STMicroelectronics

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1. SMPS output voltage 1.2 V, LDOs disable.
2. SMPS output voltage 1.8 V.
3.5
General characterization
Table 12. General characteristics
Parameter
Typ.
Unit
Frequency range
413 - 479
MHz
826 - 958
Data rate DR
2-(G)FSK
0.1 - 250
kbps
OOK/ASK
0.1 -125
Data rate accuracy
±100
ppm
Frequency deviation FDEV
0.15 - 500
kHz
3.6
Frequency synthesizer
Table 13. Frequency synthesizer parameters
Parameter
Test conditions
50 MHz
Unit
Frequency step size
Out-loop divider ratio = 4
23.8
Hz
RF carrier phase noise 433 MHz
10 kHz
-109
dBc/Hz
100 kHz
-110
1 MHz
-124
10 MHz
-141
RF carrier phase noise 868 MHz
10 kHz
-102
100 kHz
-103
1 MHz
-117
10 MHz
-138
3.7
Crystal oscillator
Characteristics measured over recommended operating conditions unless otherwise specified. All typical values
are referred to 25 °C temperature, VBAT = 3.0 V.
The device supports crystals 26 MHz.
From now on in this document the XTAL oscillator will be indicated with
fXOandthedigitalclockwithfdig
•
if a 26 MHz crystal is used, this bit must be 1 (digital divider disabled):
fdig= fxo
(1)
In order to avoid potential RF performance degradations, the crystal frequency should be chosen to satisfy the
following equation:
nFCH−ROUNDnFCHfXOfXO≥1MHz
(2)
where n is an integer in the set [1-7, B] (B is the synthesizer’s divider ratio).
S2-LPS
General characterization
DS13831 - Rev 1
page 12/73



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