Rainbow Electronics ISD1600B - Manual (Page 17)

ISD1600B SERIES
Publication Release Date: Jan. 23, 2007
- 17 - Revision 1.2
10. TYPICAL APPLICATION CIRCUIT
The below example illustrates a typical applications of ISD1600B device.
ISD1600B
AUD
MIC+
MIC -
AGC
C4
Vcc Gnd
R
OSC
R4**
R7*
V
CCD
REC
PLAYE
PLAYL
LED
R6
V
CCA
4.7 F μ
Ω 4.7 K
0.1 F μ
4.7 K Ω
0.1 F μ
4.7 KΩ
4.7 F μ
Electret
Microphone
V
CCD
V
CCA
V
SSD
V
SSA
V
SSP
C6
C10*
C9* 0.1 F μ
0.1 F μ
C11*
0.1 F μ
V
CCP
SP+
SP-
Speaker
or Buzzer
R5
390 Ω
0.1 F
C5
μ
V
CC
Q1
8050
Speaker
C8
C7
DI
LED
1 K Ω
V
CCA
V
CCD
V
CCP
2
3
4
14
12
16
15
1
10
5
10
9
13
11
8
6
7
R1
R2
R3
C1
C2
C3
***
***
Optional: based upon the
applications
Schematic shows both speaker and AUD outputs
Notes:
* These components may be needed in order to optimize for the best voice quality and system performance,
which is also dependent upon the layout of the PCB. Pending upon system requirement, Cx can be 10 μ F,
4.7 μ F or other values. For R7, 1k Ω gives satisfactory result fro most cases.
** For Sampling Freq at 8 kHz, R4 = 80 K Ω
*** It is important to have a separate path for each ground and power back to related terminal to minimize the
noise. Also, the power supplies should be decoupled as close to the device as possible.
Good Audio Design Practices
Winbond’s ChipCorder are very high-quality single-chip voice recording and playback devices. To
ensure the highest quality voice reproduction, it is important that good audio design practices on
layout and power supply decoupling are followed. See Application Information links below for details.
Design considerations for ISD1600B Series
http://www.winbond-usa.com/products/isd_products/chipcorder/applicationbriefs/AN-CC1001.pdf
Good Audio Design Practices
http://www.winbond-usa.com/products/isd_products/chipcorder/applicationinfo/apin11.pdf
Single-Chip Board Layout Diagrams
http://www.winbond-usa.com/products/isd_products/chipcorder/applicationinfo/apin12.pdf