TH71111
868/915MHz
FSK/FM/ASK Receiver
3.5 AC System Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at TA = 23 °C and VCC = 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
(standard)
Pmin, ST BIF = 180kHz,
Δf = ±20kHz,
-103
dBm
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
Input sensitivity – FSK
(narrow band)
Pmin, NB BIF = 30kHz,
Δf = ±5kHz,
-105
-109
dBm
dBm
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
Input sensitivity – ASK
Pmin, ASK BIF = 180kHz,
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
BER ≤ 3⋅10-3
Maximum input signal – FSK/FM Pmax, FSK
0
dBm
dBm
GAIN_LNA = 1
BER ≤ 3⋅10-3
GAIN_LNA = 1
Maximum input signal – ASK
Pmax, ASK
-10
Spurious emission
Image rejection
Pspur
-70
0.9
dBm
dB
45
ΔPimag
Start-up Parameters
Crystal start-up time
Receiver start-up time
TXTL
TRX
ENRX from 0 to 1
ENRX from 0 to 1,
depends on data slicer
time constant,
ms
TXTL
+
R4 · C17
valid data at output
PLL Parameters
VCO gain
KVCO
ICP
350
60
MHz/V
µA
Charge pump current
6) incl. 3 dB loss of front-end SAW filter
39010 71111
Rev. 013
Page 11 of 22
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
