MC34119DTBR2 Datasheet, PDF (9/12 Pages) Freescale Semiconductor, Inc – LOW POWER AUDIO AMPLIFIER

MC34119
Figure 22. Audio Amplifier with Bass Suppression
75 k
0.05 0.05
6 VCC
5.1 k 5.1 k
4
3
0.1
Input
5.0 µF ₂
–
#1
+
4.0 k _{4.0 k}
50 k
125 k
–#2
+
50 k
MC34119
7
Bias
Circuit
Gnd
5
Speaker
8
1
Disable
Figure 23. Frequency Response of Figure 22
36
32
24
16
8.0
0
100
1.0 k
10 k 20 k
f, FREQUENCY (Hz)
Figure 24. Audio Amplifier with Bandpass
1000 pF
100 k
1000 pF
0.05 0.05
100 k
6 VCC
5.1 k 5.1 k
4
3
0.1
Input
5.0 µF ₂
–
#1
+
4.0 k _{4.0 k}
50 k
–
125 k
#2
+
50 k
MC34119
7
Bias
Circuit
Gnd
5
Speaker
8
1 _Disable
Figure 25. Frequency Response of Figure 24
36
32
24
16
8.0
0
100
1.0 k
10 k 20 k
f, FREQUENCY (Hz)
Audio Input
Figure 26. Split Supply Operation
Ci
0.1
Ri
3.0 k
Vin ₄
FC1 3
Rf 75 k
6 VCC (+1.0 V to +8.0 V)
–
#1
+
4.0 k _{4.0 k}
5 ^VO1
Speaker
50 k
–
FC2 ^{2 125 k}
#2
+
8 ^VO2
50 k
MC34119
Bias ^{1 CD}
Circuit
4700
7
VEE
(–1.0 V to –8.0 V)
10 k _VCC
NOTE: If VCC and VEE are not symmetrical about ground then FC1 must be
connected through a capacitor to ground as shown on the front page.
VEE
20 k
Chip Disable
20 k
MOTOROLA ANALOG IC DEVICE DATA
9