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TH71112
868/915MHz
FSK/ASK Receiver
3.5
AC System Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at T A = 23 °C and V CC = 3 V,
RF at 868.3 MHz; SAW frond-end filter loss and IF at 10.7 MHz;
all parameters based on test circuits as shown in Fig. 2, Fig.3 and Fig. 5
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Receive Characteristics
Input sensitivity – FSK
P min, ST
B IF = 180kHz,
-103
dBm
(standard)
? f = ± 20kHz,
4kbps NRZ,
BER ≤ 3 ? 10 -3 , 6)
Input sensitivity – FSK
P min, NB
B IF = 30kHz,
-105
dBm
BER ≤ 3 ? 10 , 6)
(narrow band)
? f = ± 5kHz,
4kbps NRZ,
-3
Input sensitivity – ASK
P min, ASK
B IF = 180kHz,
-109
dBm
BER ≤ 3 ? 10 , 6)
4kbps NRZ,
-3
Maximum input signal – FSK
P max, FSK
BER ≤ 3 ? 10 -3
0
dBm
GAIN_LNA = 1
Maximum input signal – ASK
P max, ASK
BER ≤ 3 ? 10 -3
-10
dBm
GAIN_LNA = 1
Spurious emission
Image rejection
P spur
? P imag
60
-70
dBm
dB
Start-up Parameters
Crystal start-up time
Receiver start-up time
T XTL
T RX
ENRX from 0 to 1
ENRX from 0 to 1,
depends on data slicer
time constant,
valid data at output
0.9
T XTL
+
R4 · C17
ms
PLL Parameters
VCO gain
Charge pump current
K VCO
I CP
350
60
MHz/V
μA
incl. 3 dB loss of front-end SAW filter
39010 71112
Rev. 016
Page 11 of 20
Data Sheet
Jun/12
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