TH71111 Datasheet, PDF (11/22 Pages) Melexis Microelectronic Systems – 868/915MHz FSK/FM/ASK Receiver

TH71111
868/915MHz
FSK/FM/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
Receive Characteristics
Input sensitivity – FSK
(standard)
Input sensitivity – FSK
(narrow band)
Input sensitivity – ASK
Maximum input signal – FSK/FM
Maximum input signal – ASK
Spurious emission
Image rejection
Start-up Parameters
P_{min, ST}
P_{min, NB}
P_{min, ASK}
P_{max, FSK}
P_{max, ASK}
P_spur
ΔP_imag
B_IF = 180kHz,
Δf = ±20kHz,
4kbps NRZ,
BER ≤ 3⋅10^-3, 6)
B_IF = 30kHz,
Δf = ±5kHz,
4kbps NRZ,
BER ≤ 3⋅10^-3, 6)
B_IF = 180kHz,
4kbps NRZ,
BER ≤ 3⋅10^-3, 6)
BER ≤ 3⋅10^-3
GAIN_LNA = 1
BER ≤ 3⋅10^-3
GAIN_LNA = 1
Crystal start-up time
Receiver start-up time
T_XTL ENRX from 0 to 1
T_RX ENRX from 0 to 1,
depends on data slicer
time constant,
valid data at output
PLL Parameters
VCO gain
K_VCO
Charge pump current
I_CP
6) incl. 3 dB loss of front-end SAW filter
Typ Max Unit
-103
dBm
-105
dBm
-109
dBm
0
dBm
-10
dBm
-70
dBm
45
dB
0.9
ms
T_XTL
+
R4 · C17
350
MHz/V
60
µA
39010 71111
Rev. 013
Page 11 of 22
Data Sheet
June/07