Owner manual

INTEGRATED CIRCUITS INC.- APR9301

http://www.aplusinc.com.tw Page / 10 VER2.1

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

38KΩ

8KHZ 3.4KHZ 16 SECONDS 4.5V ~ 6.5V

52KΩ

6.4

KHZ 2.7KHZ 20 SECONDS 4.5V ~ 6.5V

67KΩ

5.3KHZ 2.3KHZ 24 SECONDS 4.8V ~ 6.5V

75KΩ

4.5KHZ 2KHZ 30 SECONDS 5.2V ~ 6.5V