AK4373 Datasheet, PDF (61/98 Pages) Asahi Kasei Microsystems – Low Power Stereo DAC with HP/SPK-Amp

[AK4373]
<External Circuit of Headphone-Amp>
1) Single-ended Output (HPBTL bit = “0”, PSEUDO bit = “0”)
The cut-off frequency (fc) of Headphone-Amp depends on an external resistor and a capacitor. Table 39 shows the cut off
frequency and the output power for various resistor/capacitor combinations. The headphone impedance R_L is 16Ω.
Output powers are shown at HVDD = 2.7, 3.3 and 3.8V. The output voltage of headphone is 0.6 x AVDD (Vpp).
HP-AMP
AK4373
C
R _Headphone
16Ω
Figure 53. External Circuit Example of Headphone (Single-ended output)
HPG bit
0
1
R [Ω] C [μF]
fc [Hz]
Output Power [mW]@0dBFS(Note 43)
HVDD=2.7V HVDD=3.3V HVDD=3.8V
AVDD=2.7V AVDD=3.3V AVDD=3.3V
0
220
45
20
30
30
100
100
6.8
100
70
10
15
15
47
149
16
100
50
5.0
7.5
7.5
47
106
0
220
45
44
67
70
100
100
(Note 44) (Note 44)
100
22
62
0.9
1.3
1.3
10
137
Table 39. External Circuit Example (Single-ended output)
Note 43. Output power at 16Ω load.
Note 44. Output signal is clipped.
MS0991-E-00
- 61 -
2008/09