MAX9814 データシートの表示（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
(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.)
GAIN vs. FREQUENCY
80
70
GAIN = UNCONNECTED
60
50
40
30
GAIN = 0
GAIN = 1
20
10
0
10
100
1k
10k
100k
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
-70
-80
10
VRIPPLE = 200mVP-P
100
1k
10k
100k
FREQUENCY (Hz)
MICBIAS POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-30
-40
-50
-60
-70
-80
-90
-100
-110
10
VRIPPLE = 200mVP-P
100
1k
10k
100k
FREQUENCY (Hz)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
10
VOUT = 800mVRMS
1
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
0.5
MICROPHONE BIAS VOLTAGE
vs. MICROPHONE BIAS SOURCE CURRENT
2.5
0.4
2.0
0.3
1.5
0.2
1.0
0.1
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT VOLTAGE
10
fIN = 300Hz, 1kHz,
1
and 3kHz
0
0
1000
5 10 15 20 25 30
IMICBIAS (mA)
INPUT-REFERRED NOISE
vs. FREQUENCY
MICIN AC-COUPLED
TO GND
100
0.1
0.1
10
fIN = 10kHz
0.01
10
100
1k
10k
100k
FREQUENCY (Hz)
0.01
0
0.5
1.0
1.5
OUTPUT VOLTAGE (VRMS)
1
0.01
0.1
1
10
100
FREQUENCY (kHz)
4 _______________________________________________________________________________________
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