MAX9814 Просмотр технического описания (PDF) - Maxim Integrated
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MAX9814 Datasheet PDF : 14 Pages
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Microphone Amplifier with AGC and
Low-Noise Microphone Bias
Typical Operating Characteristics (continued)
(VDD = 5V, CCT = 470nF, CCG = 2.2µF, VTH = VMICBIAS x 0.4, GAIN = VDD (40dB), AGC disabled, no load, RL = 10kΩ, COUT = 1µF,
TA = +25°C, unless otherwise noted.)
10,000
MICBIAS NOISE vs. FREQUENCY
1000
100
SMALL-SIGNAL PULSE RESPONSE
VMICIN
10mV/div
0V
VMICOUT
500mV/div
0V
10
10
100
1k
10k
100k
FREQUENCY (Hz)
200µs/div
CL = 10pF
VSHDN
5V/div
0V
VMICBIAS
2V/div
0V
VMICOUT
1V/div
0V
TURN-ON RESPONSE
20ms/div
VOUT vs. VIN
1.00
VTH = 1V
0.75
VOUT vs. VIN
1.00
VTH = 1V
0.75
VOUT vs. VIN
1.00
VTH = 1V
0.75
0.50
0.25
0
0
VTH = 0.75V
VTH = 0.5V
AGC ENABLED
GAIN = 1
50
100
150
VIN (mVRMS)
0.50
0.25
0
0
VTH = 0.75V
VTH = 0.5V
AGC ENABLED
GAIN = 0
10
20
30
40
VIN (mVRMS)
0.50
VTH = 0.75V
0.25
0
0
VTH = 0.5V
AGC ENABLED
GAIN = UNCONNECTED
5
10
15
VIN (mVRMS)
ATTACK TIME
ATTACK TIME
HOLD AND RELEASE TIME
VMICOUT
500mV/div
0V
VMICOUT
500mV/div
VMICOUT
500mV/div
0V
200µs/div
CCT = 47nF
0V
200µs/div
CCT = 100nF
20ms/div
CCT = 47nF
A/R = GND
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