Apr9301, Integrated circuits inc – Rainbow Electronics APR9301 User Manual
Page 4
INTEGRATED CIRCUITS INC.
-
APR9301
http://www.aplusinc.com.tw
Page / 10 VER2.1
4
Figure 3 Sample Application for the APR9301 :
NC=No Connect (must be floating)
Pins 23 and 27 have internal pull-up resistors.
The typical sampling frequency is 6.4kHz with OscR=52Kω
Table 1 Typical Dependence of Sampling Frequency and Total Voice Duration on OscR
Resistor Value
(VccA = VccD = 5V; VssA = Vssd = 0V; TA = 25℃)
OscR value
Sampling Frequency
Typical
Cutoff
Frequency
(3dB Point)
Total Voice Duration
Typical
Working Voltage
38
K
Ω
8
K
H
Z
3.4
K
H
Z
16
SECONDS
4.5V
~
6.5V
52
K
Ω
6.4
K
H
Z
2.7
K
H
Z
20
SECONDS
4.5V
~
6.5V
67
K
Ω
5.3
K
H
Z
2.3
K
H
Z
24
SECONDS
4.8V
~
6.5V
75
K
Ω
4.5
K
H
Z
2
K
H
Z
30
SECONDS
5.2V
~
6.5V