isd1000a ETC-unknow, isd1000a Datasheet - Page 18

• Manufacturer Part Number: isd1000a
• Description: Single-chip Voice Record/playback Devices 16- And 20-second Durations
• Manufacturer: ETC-unknow

-1
ISD1000A Series
APPLICATION EXAMPLE – PASSIVE COMPONENT FUNCTIONS
1–18
R1
R2
R3, R4
R5
C1, C5
C2
C3
C4
C6, C7, C8
Part
Microphone power supply
decoupling
Release time constant
Microphone biasing resistors
Series limiting resistor
Microphone DC–blocking capacitor
Low-frequency cutoff
Attack/Release time constant
Low-frequency cutoff capacitor
Microphone power supply
decoupling
Power supply capacitors
Function
Reduces power supply noise
Sets release time for AGC
Provides biasing for microphone operation
Reduces level at high supply voltages
Decouples microphone bias from chip. Provides
single-pole low-frequency cutoff and common-mode
noise rejection
Sets attack/release time for AGC
Provides additional pole for low-frequency cutoff
Reduces power supply noise
Filter and bypass of power supply
Comments
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