Rainbow Electronics U3741BM - Manual (Page 27)

27
U3741BM
4662B–RKE–10/04
Input sensitivity ASK 600 kHz IF filter BR_Range0 -108 -110 -112 dBm
Input sensitivity ASK 600 kHz IF filter BR_Range1 -106.5 -108.5 -110.5 dBm
Input sensitivity ASK 600 kHz IF filter BR_Range2 -106 -108 -110 dBm
Input sensitivity ASK 600 kHz IF filter BR_Range3 -104 -106 -108 dBm
Sensitivity variation ASK for the full
operating range compared to
T
amb
= 25°C, V
S
= 5 V
300-kHz and 600-kHz version
f
in
= 433.92 MHz/315 MHz
f
IF
= 1 MHz
P
ASK
= P
Ref_ASK
+
∆
P
Ref
∆
P
Ref
+2.5 -1.5 dB
Sensitivity variation ASK for full
operating range including IF filter
compared to T
amb
= 25°C, V
S
= 5 V
300-kHz version
f
in
= 433.92 MHz/315 MHz
f
IF
= 0.88 MHz to 1.12 MHz
f
IF
= 0.85 MHz to 1.15 MHz
P
ASK
= P
Ref_ASK
+
∆
P
Ref
∆
P
Ref
+5.5
+7.5 -1.5
-1.5 dB
dB
Sensitivity variation ASK for full
operating range including IF filter
compared to T
amb
= 25°C, V
S
= 5 V
600-kHz version
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
+
∆
P
Ref
∆
P
Ref
+5.5
+7.5 -1.5
-1.5 dB
dB
Input sensitivity FSK 600 kHz IF filter
Input matched according to Figure 4,
BER
≤
10 -3 , B = 600 kHz
f
in
= 433.92 MHz/315 MHz
T = 25°C, V
S
= 5 V
f
IF
= 1 MHz
P
Ref_FSK
Input sensitivity FSK 600 kHz IF filter
BR_Range0
df
≥
±20 kHz
df
≥
±30 kHz
-95.5
-96.5 -97.5
-98.5 -99.5
-100.5
dBm
dBm
Input sensitivity FSK 600 kHz IF filter
BR_Range1
df
≥
±20 kHz
df
≥
±30 kHz
-94.5
-95.5 -96.5
-97.5 -98.5
-99.5 dBm
dBm
Sensitivity variation FSK for the full
operating range compared to
T
amb
= 25°C, V
S
= 5 V
600-kHz version
f
in
= 433.92 MHz/315 MHz
f
IF
= 1 MHz
P
FSK
= P
Ref_FSK
+
∆
P
Ref
∆
P
Ref
+2.5 -1.5 dB
Sensitivity variation FSK for full
operating range including IF filter
compared to T
amb
= 25°C, V
S
= 5 V
600-kHz version
f
in
= 433.92 MHz/315 MHz
f
IF
= 0.86 MHz to 1.14 MHz
f
IF
= 0.82 MHz to 1.18 MHz
P
FSK
= P
Ref_FSK
+
∆
P
Ref
∆
P
Ref
+5.5
+7.5 -1.5
-1.5 dB
dB
FSK frequency deviation
The sensitivity of the receiver is higher
for higher values of
∆
f
FSK
BR_Range0
BR_Range1
BR_Range2 and BR_Range3 are not
suitable for FSK operation
∆
f
FSK
20
20 30
30 50
50 kHz
kHz
S/N ratio to suppress inband noise
signals ASK mode
FSK mode
SNR
ASK
SNR
FSK
10
2
12
3
dB
dB
Dynamic range RSSI ampl.
∆
R
RSSI
60 dB
Electrical Characteristics (Continued)
All parameters refer to GND, T
amb
= -40°C to +105°C, V
S
= 4.5 V to 5.5 V, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified.
(V
S
= 5 V, T
amb
= 25°C)
Parameters Test Conditions Symbol Min. Typ. Max. Unit