U3741BM Datasheet, PDF (28/32 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
Lower cut-off frequency of the data
filter
f_{cu_DF}
=
-----------------------------¹------------------------------
2 × π × 30kΩ × CDEM
f_{cu_DF}
0.11
0.16
0.20
kHz
Recommended CDEM for best
performance
ASK mode
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
Recommended CDEM for best
performance
FSK mode
BR_Range0 (Default)
BR_Range1
BR_Range2 and BR_Range3 are not
suitable for FSK operation
BR_Range0 (Default)
Maximum edge-to-edge time period of BR_Range1
the input data signal for full sensitivity BR_Range2
BR_Range3
CDEM
CDEM
t_{ee_sig}
39
nF
22
nF
12
nF
8.2
nF
27
nF
15
nF
1000
µs
560
µs
320
µs
180
µs
Upper cut-off frequency data 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 period of
the input data signal for full sensitivity
BR_Range0 (Default)
BR_Range1
BR_Range2
BR_Range3
Reduced sensitivity
R_Sense connected from pin Sens to V_S,
input matched according to Figure 4
Reduced sensitivity
Reduced sensitivity
Reduced sensitivity
Reduced sensitivity
Reduced sensitivity variation over full
operating range
R_Sense = 56 kΩ, f_in = 433.92 MHz,
(V_S = 5 V, T_amb = 25°C)
at B = 300 kHz
at B = 600 kHz
R_Sense = 100 kΩ, f_in = 433.92 MHz
at B = 300 kHz
at B = 600 kHz
R_Sense = 56 kΩ, f_in = 315 MHz
at B = 300 kHz
at B = 600 kHz
R_Sense = 100 kΩ, f_in = 315 MHz
at B = 300 kHz
at B = 600 kHz
R_Sense = 56 kΩ
R_Sense = 100 kΩ
P_Red = P_{Ref_Red} + DP_Red
f_u
t_{ee_sig}
P_{Ref_Red}
∆P_Red
2.5
4.3
7.6
13.6
-71
-67
-80
-76
-72
-68
-81
-77
5
6
3.1
5.4
9.5
17.0
-76
-72
-85
-81
-77
-73
-86
-82
0
0
3.7
kHz
6.5
kHz
11.4
kHz
20.4
kHz
270
µs
156
µs
89
µs
50
µs
dBm
(peak
level)
-81
dBm
-77
dBm
-90
dBm
-86
dBm
-82
dBm
-78
dBm
-91
dBm
-87
dBm
0
dB
0
dB
28 U3741BM
4662B–RKE–10/04