ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 40

• Manufacturer Part Number: ak4650
• Description: 16bit 6 Codec With Mic/hp/spk-amp & Tsc
• Manufacturer: AKM Semiconductor, Inc.

The cut-off frequency of Headphone-amp output depends on the external resistor and capacitor used. Table 33 shows the
cut off frequency and the output power for various resistor/capacitor combinations. The Headphone impedance R
16 . Output powers are shown at HVDD = 2.7, 3.0 and 3.3V. The output voltage of Headphone is 0.6 x AVDD (Vpp).
MS0502-E-01
R [ ]
6.8
16
0
Table 33. Relationship of external circuit, output power and frequency response
C [ F]
220
100
100
100
47
47
Figure 27. External Circuit Example of Headphone
HP-AMP
BOOST=OFF
AK4650
fc [Hz]
148.5
105.8
45.2
99.5
69.8
49.7
BOOST=MIN
R
- 40 -
fc [Hz]
17
42
28
74
19
46
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C
Headphone
2.7V
16
27.9
13.7
7.0
Output Power [mW]
3.0V
34.5
17.0
8.6
3.3V
41.7
20.5
10.4
[AK4650]
2007/04
L
is