SPC1000A Sunplus Technology Co., Ltd., SPC1000A Datasheet - Page 10

• Manufacturer Part Number: SPC1000A
• Description: 1024KB SOUND CONTROLLER
• Manufacturer: Sunplus Technology Co., Ltd.

Figure 1:The simplest CKT uses a low impedance speaker. It has high operation current, but the lowest cost.
Figure 2: It is the same as Figure 1 but a high impedance speaker is used.
Figure 3: The CKT contains a low pass filter. It is capable of providing higher speech quality, but it takes higher operation current.
Figure 4: Improved version of Figure 3. The standby current can be controlled by the enable pin.
Figure 5: The current mirror mode. It is able to control the volume. In addition, it is more stable and has lower operation current than Figure 1-3.
Figure 6: High quality, low operation current CKT, but more expensive.
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
8.2. Current Mode DAC Speaker Driver
RB1: ~ 360Ω (Vol)
RB2: ~ 4.7Ω
AUD
RB1: 2K~10K; C1: 1µF~10µF
RB2: ~1K;
RB2
AUD
1N4148
C1: 0.1µF ~ 1µF
RB1: 680 ~ 1.5K
AUD
C1
Figure 5
C2: ~0.1µF
Figure 1
Figure 3
C1
RB1
C2
4Ω ~ 8Ω
4Ω ~ 64Ω
RB1
VDD
RB1
8050
RE1
VDD
4Ω ~ 64Ω
VDD
8050
8050
10
AUDP
RB1
AUD
AUD
RB1: 2K~10K; C1: 1µF~10µF
RB2: ~1K;
Enable
RB1: 10K ~ 50K
RB2: 820 ~ 1.5K
C1: 0.1µF ~ 1µF
RB2
RB2
20K
RB1
3
2
RB1
Figure 2
C2: ~0.1µF
Figure 4
Figure 6
LM386
Power
C1
4
C1
32Ω ~ 64Ω
6
7
5
0.1µF
4Ω ~ 8Ω
C2
0.01µF
220µF
SPC1000A
VDD
10
8050
VDD
8050
SEP. 14, 2001
Version: 2.6