U3745BM Datasheet, PDF (24/29 Pages) ATMEL Corporation – UHF ASK RECEIVER IC

Electrical Characteristics (Continued)
All parameters refer to GND, V_S = 5 V, T_amb = 25°C, f₀ = 433.92 MHz and f₀ = 315 MHz, unless otherwise specified. The
possible operating range refer to different circuit conditions: V_S = 4.5 V to 5.5 V, T_amb = -40°C to +85°C
Parameters
Test Conditions
Symbol
Min.
Typ.
Max. Unit
XTO operating frequency
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 at Pin XT0
Analog Signal Processing
Input sensitivity ASK 600-kHz IF filter
Input matched according to figure 6
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
BR_Range0
BR_Range1
BR_Range2
BR_Range3
Sensitivity variation ASK for full
operating range including IF filter
compared to T_amb = 25°C, V_S = 5 V
S/N ratio to suppress inband noise
signals
600-kHz version
f_in = 433.92 MHz/315 MHz
f_IF = 0.81 MHz to 1.19 MHz
f_IF = 0.75 MHz to 1.25 MHz
P_ASK = P_{Ref_ASK} + DP_Ref
ASK mode
Dynamic range RSSI ampl.
f_XTO
R_S
C_XT0
6.764375 6.764375 6.764375
-50 ppm
+50 ppm
4.90625 4.90625 4.90625
-50 ppm
+50 ppm
150
220
6.5
MHz
MHz
W
W
pF
P_{Ref_ASK}
-106
-104.5
-104
-102
-110
-108.5
-108
-106
-113.5
-112
-111.5
-109.5
dBm
dBm
dBm
dBm
DP_Ref
+3
dB
+5
dB
SNR_ASK
11
dB
DR_RSSI
60
dB
Lower cut-off frequency of the data
filter
f_{cu_DF} = -₂----_´-----_p-----_´-----₃---₀---_k--¹--_W------_´-----_C----_D----_E----_M----
CDEM = 33 nF
Recommended CDEM for best
performance
ASK mode
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
BR_Range0 (Default)
Maximum edge-to-edge time period of BR_Range1
the input data signal for full sensitivity BR_Range2
BR_Range3
BR_Range0 (Default)
Minimum edge-to-edge time period of BR_Range1
the input data signal for full sensitivity BR_Range2
BR_Range3
f_{cu_DF}
0.11
0.16
0.20
kHz
CDEM
t_{ee_sig}
t_{ee_sig}
39
nF
22
nF
12
nF
8.2
nF
1000
µs
560
µs
320
µs
180
µs
270
µs
156
µs
89
µs
50
µs
24 U3745BM
4663A–RKE–06/03