Low-Cost, Micropower, SC70/SOT23-8, Microphone
Preamplifiers with Complete Shutdown
Test Circuits/Timing Diagrams (continued)
MIC_BIAS
VCC
SHDN
1kΩ
100kΩ
10µF
2.2kΩ 100kΩ
MICROPHONE
INPUT
IN+
0.01µF
IN-
OUT
MAX4468
3.5mm SOCKET
Figure 3. Bias Network Circuit
0.1µF
20kΩ
GND
200kΩ
47pF
CL = 2000pF
50mV/div
40µs/div
Figure 4. Small-Signal Transient Response with Excessive
Capacitive Load
RL = 10kΩ
CL = 10pF
SHDN
2V/div
OUT
400µs/div
Figure 5. MAX4467/MAX4468 Shutdown Waveform
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