U4311B-FS Datasheet, PDF (10/13 Pages) ATMEL Corporation – Low-Current Superhet Remote Control Receiver

U4311B-FS
V_S
R₁
8.2 kW
C₇
10 mF
C₈
100 nF
C₉
10 mF
C₁₀
10 nF
R₉
56 W
R₁₀
300 W
IF input
R₈
100 kW
C₁₁
10 nF
Wake-up
out
20 19 18 17 16 15 14 13 12 11
C₂
C₁
100 nF 10 nF
R₂
30 kW
Data filter
output
C₃
1.5 nF
R₆
100 kW
1
2
3
4
5
6
7
8
9 10
R₅
100 kW
C₄
100 nF
Wake up
R₇
R₃
22 kW _{220 kW}
C₅
220 nF
R₁₂
C₁₂
100 kW 220 nF
R₁₃
10 kW
R₄
100 kW
Comparator
output
C₆
220 nF
R₁₁
10 kW
Figure 23. AM test circuit with 2-kHz Bessel lowpass data filter
10
0
–10
–20
–30
–40
–50
–60
–70
–80
0
95 10292
S+N
N (low level)
N (high level)
20
40
60
80 100
IF-input level ( dmBV )
Figure 24. Signal-to-noise ratio AM
100
90
+25°C
80
+85°C
70
60
50
–40°C
40
30
20
10
10 25 40 55 70 85 100
95 10276
IF-input level (dBmV )
Figure 25. AM-demodulator characteristic vs. temperature
10 (13)
Rev. A3, 28-Sep-00