U3741BM Datasheet, PDF (26/32 Pages) ATMEL Corporation – UHF ASK RECEIVER IC

Electrical Characteristics (Continued)
All parameters refer to GND, T_amb = -40°C to +105°C, V_S = 4.5 V to 5.5 V, f₀ = 433.92 MHz and f₀ = 315 MHz, unless otherwise specified.
(V_S = 5 V, T_amb = 25°C)
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
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
Input matched according to Figure 4,
BER ≤10^-3,
ASK mode
f_osc = 432.92 MHz
at 1 MHz
at 10 MHz
at ±f_XTO
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
Series
resonance
resistor
of
the
crystal
f_XTO
=
6.764 MHz
4.906 MHz
Static capacitance of the crystal
Analog Signal Processing
Input sensitivity ASK 300-kHz IF filter
Input sensitivity ASK 300-kHz IF filter
Input matched according to Figure 4
ASK (level of carrier)
BER ≤10^-3, B = 300 kHz
f_in = 433.92 MHz/315 MHz
T = 25°C, V_S = 5 V
f_IF = 1 MHz
BR_Range0
Input sensitivity ASK 300-kHz IF filter BR_Range1
Input sensitivity ASK 300-kHz IF filter BR_Range2
Input sensitivity ASK 300-kHz IF filter BR_Range3
Input sensitivity ASK 600 kHz IF filter
Input matched according to Figure 4
ASK (level of carrier)
BER ≤10^-3, B = 600 kHz
f_in = 433.92 MHz/315 MHz
T = 25°C, V_S = 5 V
f_IF = 1 MHz
P_{in_max}
-28
dBm
-20
dBm
f_VCO
L (fm)
K_VCO
299
449
MHz
-93
-113
-55
190
-90
-110
-47
dBC/Hz
dBC/Hz
dBC
MHz/V
B_Loop
100
kHz
C_{LF_tot}
10
nF
f_XTO
6.764375 6.764375 6.764375 MHz
-30 ppm
+30 ppm
4.90625 4.90625 4.90625 MHz
-30 ppm
+30 ppm
R_S
150
Ω
220
Ω
C_xto
6.5
pF
P_{Ref_ASK}
-109
-107
-106
-104
-111
-109
-108
-106
-113
-111
-110
-108
dBm
dBm
dBm
dBm
P_{Ref_ASK}
26 U3741BM
4662B–RKE–10/04