u3742bm ATMEL Corporation, u3742bm Datasheet - Page 28

• Manufacturer Part Number: u3742bm
• Description: Uhf Ask/fsk Receiver
• Manufacturer: ATMEL Corporation

Electrical Characteristics (Continued)
All parameters refer to GND, T
wise specified. (V
28
Parameters
Loop bandwidth of the PLL
Capacitive load at pin LF
XTO operating frequency
Series resonance resistor of the
crystal
Static capacitance of the crystal
Analog Signal Processing
Input sensitivity ASK
Input sensitivity ASK
Sensitivity variation ASK for the full
operating range compared to
T
Sensitivity variation ASK for full
operating range including IF filter
compared to T
Input sensitivity FSK
Input sensitivity FSK
amb
= 25 ° C, V
U3742BM
amb
S
= 5 V
= 25 ° C, V
S
= 5 V, T
S
= 5 V
amb
amb
= 25°C)
= -40°C to +105°C, V
Test Conditions
For best LO noise
(design parameter)
R
C
C
The capacitive load at pin LF is limited
if bit check is used. The limitation
therefore also applies to self-polling.
XTO crystal frequency,
appropriate load capacitance must be
connected to XTAL
6.764375 MHz
4.90625 MHz
f
Input matched according to Figure 6
ASK (level of carrier)
BER £ 10
f
T = 25 ° C, V
BR_Range0
BR_Range1
BR_Range2
BR_Range3
f
f
P
f
f
f
P
Input matched according to Figure 6,
BER £ 10
f
T = 25 ° C, V
BR_Range0
df ³ ±20 kHz
df ³ ±30 kHz
BR_Range1
df ³ ±20 kHz
df ³ ±30 kHz
XTO
in
in
IF
in
IF
IF
in
ASK
ASK
1
9
10
= 433.92 MHz/315 MHz
= 433.92 MHz/315 MHz
= 433.92 MHz/315 MHz
= 433.92 MHz/315 MHz
= 1 MHz
= 0.79 MHz to 1.21 MHz
= 0.73 MHz to 1.27 MHz
= 820 W
= 4.7 nF
= 1 nF
= 6.764 MHz
= P
= P
4.906 MHz
Ref_ASK
Ref_ASK
-3
-3
, f
, f
S
S
IF
IF
= 5 V
= 5 V
= 1 MHz
= 1 MHz
+ D P
+ D P
Ref
Ref
S
= 4.5 V to 5.5 V, f
Symbol
P
P
0
C
D P
D P
B
Ref_ASK
Ref_FSK
= 433.92 MHz and f
f
C
LF_tot
R
XTO
Loop
xto
Ref
Ref
S
6.764375
-30 ppm
4.90625
-30 ppm
-106.5
-95.5
-96.5
-94.5
-95.5
Min.
-108
-106
-104
+2.5
+5.5
+7.5
6.764375
4.90625
-108.5
0
-97.5
-98.5
-96.5
-97.5
Typ.
-110
-108
-106
100
= 315 MHz, unless other-
6.764375
+30 ppm
+30 ppm
4.90625
-110.5
-100.5
Max.
-99.5
-98.5
-99.5
-112
-110
-108
-1.5
-1.5
-1.5
150
220
6.5
10
4735A–RKE–11/03
MHz
MHz
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
Unit
kHz
dB
dB
dB
nF
pF
W
W