APR9301 Aplus Integrated circuits Inc., APR9301 Datasheet - Page 5

• Manufacturer Part Number: APR9301
• Description: Apr9301 Re-recording Voice Ic
• Manufacturer: Aplus Integrated circuits Inc.

Figure 4 shows the same application using external microphone biasing instead of the
microphone amplifier on the APR9301 device, thus bypassing the preamplifier portion
of the chip function.
Figure 4 Sample Application Using External Microphone Biasing :
Notes:
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
NPN bipolar transistor,T1 model #MPS3904 or equivalent.
Electrical Characteristics
http://www.aplusinc.com.tw
Tables 2 through 4 list Absolute Maximum Ratings, Recommended DC Characteristics,
and recommended Analog Characteristics for the APR9301 device
INTEGRATED CIRCUITS INC.
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