MAX9723(2005) 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
MAX9723
(Rev.:2005)
(Rev.:2005)
Maxim Integrated
MAX9723 Datasheet PDF : 23 Pages
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Stereo DirectDrive Headphone Amplifier with
BassMax, Volume Control, and I2C
MAX9723A AND MAX9723B
TRANSFER FUNCTION (BIT 5 = 1)
10
0
-10
-20
-30
-40
-50
0
6
12
18 24
30
CODE
Figure 7. MAX9723A/MAX9723B Transfer Function with Bit 5 = 1
MAX9723A AND MAX9723B
TRANSFER FUNCTION (BIT 5 = 0)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
6
12
18 24
30
CODE
Figure 8. MAX9723A/MAX9723B Transfer Function with Bit 5 = 0
MAX9723C AND MAX9723D
TRANSFER FUNCTION (BIT 5 = 1)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
0
6
12
18 24
30
CODE
Figure 9. MAX9723C/MAX9723D Transfer Function with Bit 5 = 1
MAX9723C AND MAX9723D
TRANSFER FUNCTION (BIT 5 = 0)
10
0
-10
-20
-30
-40
-50
0
6
12
18 24
30
CODE
Figure 10. MAX9723C/MAX9723D Transfer Function with Bit 5 = 0
where RIN is a minimum of 10kΩ. Choose CIN such that
f-3dB is well below the lowest frequency of interest.
Setting f-3dB too high affects the amplifier’s low-frequen-
cy response. Use capacitors with low-voltage coefficient
dielectrics. Film or C0G dielectric capacitors are good
choices for AC-coupling capacitors. Capacitors with
high-voltage coefficients, such as ceramics, can result in
increased distortion at low frequencies.
Charge-Pump Flying Capacitor
The charge-pump flying capacitor connected between
C1N and C1P affects the charge pump’s load regula-
tion and output impedance. Choosing a flying capacitor
that is too small degrades the MAX9723’s ability to pro-
vide sufficient current drive and leads to a loss of out-
put voltage. Increasing the value of the flying capacitor
improves load regulation and reduces the charge-
pump output impedance. See the Output Power vs.
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