max9723aebe Maxim Integrated Products, Inc., max9723aebe Datasheet - Page 17

• Manufacturer Part Number: max9723aebe
• Description: Max9723 Stereo Directdrive Headphone Amplifier With Bassmax, Volume Control, And I?c
• Manufacturer: Maxim Integrated Products, Inc.

Figure 7. MAX9723A/MAX9723B Transfer Function with Bit 5 = 1
Figure 9. MAX9723C/MAX9723D Transfer Function with Bit 5 = 1
where R
f
Setting f
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.
-3dB
is well below the lowest frequency of interest.
IN
-3dB
-10
-20
-30
-40
-50
-10
-20
-30
-40
-50
-60
-70
-80
is a minimum of 10kΩ. Choose C
10
10
0
0
too high affects the amplifier’s low-frequen-
0
0
TRANSFER FUNCTION (BIT 5 = 1)
TRANSFER FUNCTION (BIT 5 = 1)
______________________________________________________________________________________
MAX9723A AND MAX9723B
MAX9723C AND MAX9723D
Stereo DirectDrive Headphone Amplifier
6
6
with BassMax, Volume Control, and I
12
12
CODE
CODE
18
18
24
24
30
30
IN
such that
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.
Figure 8. MAX9723A/MAX9723B Transfer Function with Bit 5 = 0
Figure 10. MAX9723C/MAX9723D Transfer Function with Bit 5 = 0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10
-20
-30
-40
-50
10
0
0
0
0
TRANSFER FUNCTION (BIT 5 = 0)
TRANSFER FUNCTION (BIT 5 = 0)
MAX9723A AND MAX9723B
MAX9723C AND MAX9723D
6
6
Charge-Pump Flying Capacitor
12
12
CODE
CODE
18
18
24
24
30
30
2
C
17