Electrical characteristics (continued) – Rainbow Electronics T5761 User Manual
Page 32
32
T5760/T5761
4561B–RKE–10/02
Sensitivity variation ASK for the full
operating range compared to
T
amb
= 25
°
C, V
S
= 5 V
f
in
= 868.3 MHz/915 MHz
f
IF
= 950 kHz/1 MHz
P
ASK
= P
Ref_ASK
+
D
P
Ref
D
P
Ref
+2.5
-1.0
dB
Sensitivity variation ASK for full
operating range including IF filter
compared to T
amb
= 25
°
C, V
S
= 5 V
f
in
= 868.3 MHz/915 MHz
f
IF
= 950 kHz/1 MHz
f
IF
-210 kHz to +210 kHz
f
IF
-270 kHz to +270 kHz
P
ASK
= P
Ref_ASK
+
D
P
Ref
D
P
Ref
+5.5
+7.5
-1.5
-1.5
dB
dB
Input sensitivity FSK
BER
£
10
-3
f
in
= 868.3 MHz/915 MHz
V
S
= 5 V, T
amb
= 25
°
C
f
IF
= 950 kHz/1 MHz
BR_Range0
df = ±16 kHz to ±28 kHz
df = ±10 kHz to ±100 kHz
P
Ref_FSK
-103
-101
-106
-107.5
-107.5
dBm
dBm
BR_Range1
df = ±16 kHz to ±28 kHz
df = ±10 kHz to ±100 kHz
P
Ref_FSK
-101
-99
-104
-105.5
-105.5
dBm
dBm
BR_Range2
df = ±18 kHz to ±31 kHz
df = ±13 kHz to ±100 kHz
P
Ref_FSK
-99.5
-97.5
-102.5
-104
dBm
dBm
BR_Range3
df = ±25 kHz to ±44 kHz
df = ±20 kHz to ±100 kHz
P
Ref_FSK
-97.5
-95.5
-100.5
-102
dBm
dBm
Sensitivity variation FSK for the full
operating range compared to
T
amb
= 25
°
C,
V
S
= 5 V
f
in
= 868.3 MHz/915 MHz
f
IF
= 950 kHz/1 MHz
P
FSK
= P
Ref_FSK
+
D
P
Ref
D
P
Ref
+3
-1.5
dB
Sensitivity variation FSK for the full
operating range including IF filter
compared to
T
amb
= 25
°
C,
V
S
= 5 V
f
in
= 868.3 MHz/915 MHz
f
IF
= 950 kHz/1 MHz
f
IF
-150 kHz to +150 kHz
f
IF
-200 kHz to +200 kHz
f
IF
-260 kHz to +260 kHz
P
FSK
= P
Ref_FSK
+
D
P
Ref
D
P
Ref
+6
+8
+11
-2
-2
-2
dB
dB
dB
S/N ratio to suppress inband noise
signals. Noise signals may have
any modulation scheme
ASK mode
FSK mode
SNR
ASK
SNR
FSK
10
2
12
3
dB
dB
Dynamic range RSSI amplifier
DR
RSSI
60
dB
Lower cut-off frequency of the data
filter
CDEM = 33 nF
fcu_DF
0.11
0.16
0.20
kHz
Recommended CDEM for best
performance
BR_Range0 (default)
BR_Range1
BR_Range2
BR_Range3
CDEM
39
22
12
8.2
nF
nF
nF
nF
Electrical Characteristics (continued)
All parameters refer to GND, T
am b
= -40
°
C to +105
°
C, V
S
= 4.5 V to 5.5 V, f
0
= 868.3 MHz and f
0
= 915 MHz,
unless otherwise specified. (For typical values: V
S
= 5 V, T
amb
= 25
°
C)
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
f
cu_DF
1
2
p
´
30 k
W
´
CDEM
´
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