u3745bm ATMEL Corporation, u3745bm Datasheet - Page 24

• Manufacturer Part Number: u3745bm
• Description: Receiver
• Manufacturer: ATMEL Corporation

Electrical Characteristics (Continued)
All parameters refer to GND, V
possible operating range refer to different circuit conditions: V
24
Parameters
XTO operating frequency
Series resonance resistor of the
crystal
Static capacitance at Pin XT0
Analog Signal Processing
Input sensitivity ASK 600-kHz IF filter
Sensitivity variation ASK for full
operating range including IF filter
compared to T
S/N ratio to suppress inband noise
signals
Dynamic range RSSI ampl.
Lower cut-off frequency of the data
filter
Recommended CDEM for best
performance
Maximum edge-to-edge time period of
the input data signal for full sensitivity
Minimum edge-to-edge time period of
the input data signal for full sensitivity
U3745BM
amb
= 25 ° C, V
S
= 5 V
S
= 5 V, T
Test Conditions
XTO crystal frequency,
appropriate load capacitance must be
connected to XTAL
6.764375 MHz
4.90625 MHz
f
4.906 MHz
Input matched according to figure 6
ASK (level of carrier)
BER £ 10
f
T = 25 ° C, V
f
BR_Range0
BR_Range1
BR_Range2
BR_Range3
600-kHz version
f
f
f
P
ASK mode
CDEM = 33 nF
ASK mode
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
f
XTO
in
IF
in
IF
IF
cu_DF
ASK
= 433.92 MHz/315 MHz
= 433.92 MHz/315 MHz
= 1 MHz
= 0.81 MHz to 1.19 MHz
= 0.75 MHz to 1.25 MHz
= 6.764 MHz
= P
amb
=
Ref_ASK
-3
---------------------------------------------------------
2 p
= 25 ° C, f
, B = 600 kHz
´
S
= 5 V
´
+ D P
30k W
1
0
Ref
= 433.92 MHz and f
´
CDEM
S
= 4.5 V to 5.5 V, T
Symbol
P
SNR
DR
CDEM
D P
f
t
t
Ref_ASK
C
cu_DF
ee_sig
ee_sig
f
0
XTO
R
XT0
RSSI
= 315 MHz, unless otherwise specified. The
Ref
S
ASK
amb
6.764375
-50 ppm
-50 ppm
4.90625
= -40 ° C to +85 ° C
-104.5
Min.
-106
-104
-102
0.11
+3
+5
6.764375
4.90625
-108.5
Typ.
-110
-108
-106
0.16
8.2
11
60
39
22
12
6.764375
+50 ppm
+50 ppm
4.90625
-113.5
-111.5
-109.5
Max.
1000
-112
0.20
150
220
560
320
180
270
156
6.5
89
50
4663A–RKE–06/03
MHz
MHz
dBm
dBm
dBm
dBm
Unit
kHz
dB
dB
dB
dB
pF
nF
nF
nF
nF
µs
µs
µs
µs
µs
µs
µs
µs
W
W