u3741bm ATMEL Corporation, u3741bm Datasheet - Page 26

• Manufacturer Part Number: u3741bm
• Description: Uhf Ask Receiver Ic
• Manufacturer: ATMEL Corporation

Electrical Characteristics (Continued)
All parameters refer to GND, T
(V
Parameters
Maximum input level
Local Oscillator
Operating frequency range VCO
Phase noise VCO/LO
Spurious of the VCO
VCO gain
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 300-kHz IF filter
Input sensitivity ASK 300-kHz IF filter
Input sensitivity ASK 300-kHz IF filter
Input sensitivity ASK 300-kHz IF filter
Input sensitivity ASK 300-kHz IF filter
Input sensitivity ASK 600 kHz IF filter
26
S
= 5 V, T
amb
U3741BM
= 25°C)
amb
= -40°C to +105°C, V
Test Conditions
Input matched according to Figure 4,
BER ≤ 10
ASK mode
f
at 1 MHz
at 10 MHz
at ±f
For best LO noise
(design parameter)
R1 = 820 Ω
C9 = 4.7 nF
C10 = 1 nF
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 4
ASK (level of carrier)
BER ≤ 10
f
T = 25°C, V
f
BR_Range0
BR_Range1
BR_Range2
BR_Range3
Input matched according to Figure 4
ASK (level of carrier)
BER ≤ 10
f
T = 25°C, V
f
osc
XTO
in
IF
in
IF
= 433.92 MHz/315 MHz
= 433.92 MHz/315 MHz
= 1 MHz
= 1 MHz
= 432.92 MHz
XTO
= 6.764 MHz
4.906 MHz
-3
-3
-3
,
, B = 300 kHz
, B = 600 kHz
S
S
= 5 V
= 5 V
S
= 4.5 V to 5.5 V, f
0
= 433.92 MHz and f
Symbol
P
P
P
L (fm)
C
K
B
Ref_ASK
Ref_ASK
f
f
C
in_max
VCO
LF_tot
R
XTO
VCO
Loop
xto
S
6.764375
-30 ppm
4.90625
-30 ppm
0
= 315 MHz, unless otherwise specified.
Min.
-109
-107
-106
-104
299
6.764375
4.90625
Typ.
-113
-111
-109
-108
-106
190
100
-93
-55
6.764375
+30 ppm
+30 ppm
4.90625
Max.
-110
-113
-111
-110
-108
449
150
220
-28
-20
-90
-47
6.5
10
4662B–RKE–10/04
dBC/Hz
dBC/Hz
MHz/V
dBm
dBm
MHz
MHz
MHz
dBm
dBm
dBm
dBm
Unit
dBC
kHz
nF
pF
Ω
Ω