ISD1600B SERIES
10. TYPICAL APPLICATION CIRCUIT
The below example illustrates a typical applications of ISD1600B device.
DI
LED
VCCD
R6
1 K Ω
R7*
16
15
LED
2
3
4
Vcc
***
VCCD
VCCP
Gnd
REC
VCCD
VCCA
C6
VCCA
C9*
μ
0.1
F
F
R1
***
1
VSSD
VCCA
PLAYE
PLAYL
Ω
4.7 K
10
C7
C10*
Optional: based upon the
applications
μ
R2
4.7 K
0.1
VSSA
5
Ω
Speaker
ISD1600B
VCC
10
Electret
Microphone
VCCP
VSSP
6
7
MIC+
MIC -
C8
C2
C3
C11*
μ
0.1
F
μ
0.1 F
9
Q1
8050
C1
μ
0.1
F
μ
4.7
F
13
R4**
C4
R3
4.7 KΩ
AUD
ROSC
AGC
14
12
11
8
R5
390
SP+
SP-
C5
0.1
Speaker
or Buzzer
Ω
F
μ
4.7
F
μ
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 μF,
4.7 μF or other values. For R7, 1kΩ gives satisfactory result fro most cases.
** For Sampling Freq at 8 kHz, R4 = 80 KΩ
*** 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
Publication Release Date: Jan. 23, 2007
- 17 -
Revision 1.2
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