Rainbow Electronics T5744 - Manual (Page 13)

13
T5744
4521A–RKE–02/02
Maximum input level Input matched according to
Figure 6, BER
≤
10 -3
P
in_max
-20 dBm
Local Oscillator
Operating frequency range
VCO
f
VCO
299 449 MHz
Phase noise VCO / LO f
osc
= 432.92 MHz
at 1 MHz
at 10 MHz L (fm) -93
-113
-90
-110
dBC/Hz
dBC/Hz
Spurious of the VCO at ± f
XTO
-55 -47 dBC
VCO gain K
VCO
190 MHz/V
Loop bandwidth of the PLL For best LO noise
(design parameter)
R1 = 820
Ω
C9 = 4.7 nF
C10 = 1 nF
B
Loop
100 kHz
Capacitive load at Pin LF C
LF_tot
10 nF
XTO operating frequency XTO crystal frequency,
appropriate load capacitance
must be connected to XTAL
f
XTAL
= 6.764375 MHz (EU)
f
XTAL
= 4.90625 MHz (US)
f
XTO
6.764375
-30 ppm
4.90625
-30 ppm
6.764375
4.90625
6.764375
+30 ppm
4.90625
+30 ppm
MHz
MHz
Series resonance resistor of
the crystal f
XTO
= 6.764 MHz
4.906 MHz
R
S
150
220
Ω
Ω
Static capacitance of the
crystal
C
o
6.5 pF
Analog Signal Processing
Input sensitivity Input matched according to
Figure 6
ASK (level of carrier)
BER
≤
10 -3 (Manchester),
f
in
= 433.92 MHz/ 315 MHz
T = 25°C, V
S
= 5 V, f
IF
= 1 MHz
P
Ref_ASK
BR_Range0 (1 kBd) -107 -110 -112 dBm
BR_Range1 (2 kBd) -105 -108 -110 dBm
BR_Range2 (4kBd) -103 -106 -108 dBm
BR_Range3 (8 kBd) -101 -104 -106 dBm
Sensitivity variation for the
full operating range
compared to
T
amb
= 25 ° C, V
S
= 5 V
f
in
= 433.92 MHz/ 315 MHz
f
IF
= 1 MHz
P
ASK
= P
Ref_ASK
+ DP
Ref
∆
P
Ref
+2.5 -1.5 dB
Sensitivity variation for full
operating range including IF
filter compared to
T
amb
= 25°C, V
S
= 5 V
f
in
= 433.92 MHz/ 315 MHz
f
IF
= 0.79 MHz to 1.21 MHz
f
IF
= 0.73 MHz to 1.27 MHz
P
ASK
= P
Ref_ASK
+ DP
Ref
∆
P
Ref +5.5
+7.5 -1.5
-1.5 dB
dB
S/N ratio to suppress inband
noise signals
SNR 10 12 dB
Electrical Characteristics (continued)
Parameters Test Conditions Symbol Min. Typ. Max. Unit