|
U3741BM Datasheet, PDF (22/25 Pages) ATMEL Corporation – UHF ASK RECEIVER IC | |||
|
◁ |
U3741BM
Electrical Characteristics (continued)
All parameters refer to GND, Tamb = â40°C to +105°C, VS = 4.5 V to 5.5 V, f0 = 433.92 MHz and f0 = 315 MHz,
unless otherwise specified. (VS = 5 V, Tamb = 25°C)
Parameters
Test Conditions / Pins
Symbol Min.
Typ.
Max.
Unit
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Sensitivity variation FSK for 300-kHz and 600-kHz version
DPRef
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ the full operating range
fin = 433.92 MHz/ 315 MHz
compared to Tamb = 25°C,
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ VS = 5 V
D fIF = 1 MHz
PFSK = PRef_FSK + PRef
+2.5
â1.5
dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Sensitivity variation FSK for 600-kHz version
DPRef
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ full operating range including fin = 433.92 MHz/ 315 MHz
IF filter compared to
fIF = 0.86 MHz to 1.14 MHz
+5.5
â1.5
dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà Tamb = 25°C, VS = 5 V
fIF =
PFSK
0.82 MHz to 1.18 MHz
D = PRef_FSK + PRef
+7.5
â1.5
dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ FSK frequency deviation
The sensitivity of the receiver is
higher for higher values of DfFSK
DfFSK
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range0
20
30
50
kHz
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range1
20
30
50
kHz
BR_Range2 and BR_Range3
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ are not suitable for FSK
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ operation
S/N ratio to suppress inband ASK mode
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ noise signals
FSK mode
SNRASK
10
SNRFSK
2
12
dB
3
dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Dynamic range RSSI ampl.
DRRSSI
60
dB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ + Lower cut-off frequency of
the data filter
fcu_DF
2
p
1
30kW
CDEM
fcu_DF
0.11
0.16
0.20
kHz
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ CDEM = 33 nF
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Recommended CDEM for ASK mode
CDEM
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ best performance
BR_Range0 (Default)
39
nF
BR_Range1
22
nF
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range2
12
nF
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range3
8.2
nF
FSK mode
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range0 (Default)
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range1
BR_Range2 and BR_Range3
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ are not suitable for FSK
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ operation
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Maximum edge-to-edge time BR_Range0 (Default)
period of the input data signal BR_Range1
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ for full sensitivity
BR_Range2
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range3
CDEM
tee_sig
27
nF
15
nF
1000
ms
560
ms
320
ms
180
ms
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Upper cut-off frequency data
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ filter
Upper cut-off frequency
programmable in 4 ranges
via a serial mode word
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
Minimum edge-to-edge time BR_Range0 (Default)
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ period of the input data signal BR_Range1
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ for full sensitivity
BR_Range2
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ BR_Range3
fu
2.5
3.1
3.7
kHz
4.3
5.4
6.5
kHz
7.6
9.5
11.4
kHz
13.6
17.0
20.4
kHz
tee_sig
270
ms
156
ms
89
ms
50
ms
22 (25)
Preliminary Information
Rev. A1, 15-Oct-98
|
▷ |