MAX9810CEBS-T Maxim Integrated, MAX9810CEBS-T Datasheet - Page 8

• Manufacturer Part Number: MAX9810CEBS-T
• Description: Microphone Preamplifiers
• Manufacturer: Maxim Integrated

Electret Condenser Microphone Cartridge
Preamplifier
Figure 1. Conventional FET ECM
Figure 3. Rail-to-Rail Waveforms
8
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ECM CARTRIDGE
OUTPUT SIGNAL CLIPS ON THE NEGATIVE RAIL FIRST
NO CLIPPING, SYMMETRICAL RAIL-TO-RAIL OPERATION
OUTPUT CLIPS ON THE POSITIVE RAIL FIRST
FET IMPEDANCE
ELECTRET
MIC
CONVERTER
V
V
V
DD
DD
DD
= 3V
= 5V
= 2.3V
+V
S
PREAMPLIFIER
EXTERNAL
1.5V
1.5V
1.5V
GND
GND
GND
GND
OUTPUT
Figure 2. MAX9810 ECM
TRANSISTOR COUNT: 427
PROCESS: BiCMOS
Figure 4. MAX9810 RF Rejection
ELECTRET
ECM CARTRIDGE
MIC
90
80
70
60
50
40
30
20
10
0
vs. SWEPT AC SIGNAL ON POWER SUPPLY
500
0.1µF BYPASS CAPACITOR
550 600 650 700 750 800
GND
MAX9810
1nF BYPASS CAPACITOR
NO BYPASS CAPACITOR
CARRIER FREQUENCY (MHz)
BIAS
1.5V
1kHz REJECTION
V
DD
Chip Information
850
900
950
1000
POWER
OUTPUT
GND