AK4645EN Datasheet, PDF (63/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
HP-AMP
AK4645
CR
0.22µ
10Ω
Headphone
16Ω
[AK4645]
Figure 57. ϔουϑΥϯΞϯϓͷ֎෇͚ճ࿏ྫ
HPG bit R [Ω]
0
0
6.8
16
0
1
100
C [µF]
fc [Hz]
BOOST
=OFF
fc [Hz]
BOOST
=MIN
fs=44.1kHz
Output Power [mW]@0dBFS
HVDD=3.0V HVDD=3.3V HVDD=5V
AVDD=3.0V AVDD=3.3V AVDD=3.3V
220
45
17
25.3
30.6
30.6
100
100
43
100
70
28
12.5
15.1
15.1
47
149
78
100
50
19
6.3
7.7
7.7
47
106
47
220
45
100
100
17
43
51
(Note 41)
62
(Note 41)
70
22
62
25
1.1
1.3
1.3
10
137
69
Table 55. ֎෇͚ճ࿏ྫ
Note 40. 16Ωෛՙ୺Ͱͷग़ྗిྗͰ͢ɻ
Note 41. ग़ྗ৴߸͸ΫϦοϓ͠·͢ɻ
ʻϔουϑΥϯΞϯϓͷPSRRʼ
ܞଳి࿩ͷγεςϜʹ͓͍ͯHVDDΛόοςϦిѹ͔Β௚઀͢څڙΔ৔߹ɺRFϊΠζ͕ϔουϑΥϯΞϯϓ
ͷಛੑʹӨڹΛ͢΅ٴ৔߹͕͋Γ·͢ɻVBAT bit = “1”ʹઃఆ͢ΔͱɺHVDDʹॏ৞͞ΕΔϊΠζʹର͢Δ
ϔουϑΥϯΞϯϓͷPSRRΛվળ͢Δ͜ͱ͕Ͱ͖·͢ɻ͜ͷͱ͖ϔουϑΥϯΞϯϓͷίϞϯిѹ͸0.64 x
AVDD(typ)Ͱ͢ɻAVDD=3.3V࣌ɺίϞϯిѹ͸2.1VͱͳΔͷͰɺHVDDͷిѹ͕4.2VΑΓ΋Լ͕ͬͨ৔߹ɺ
ग़ྗ৴߸͕ΫϦοϓ͠΍͘͢ͳΓ·͢ɻ
VBAT bit
0
1
Common Voltage [V]
0.5 x HVDD
0.64 x AVDD
Table 56. ϔουϑΥϯΞϯϓͷίϞϯిѹ
ʻ֎෦ϔουϑΥϯΞϯϓͱͷWired ORʼ
PMVCM=PMHPL=PMHPR bits = “0”, HPZ bit = “1”ͷͱ͖ɺHP-Amp͸ύϫʔμ΢ϯ͠ɺHPL, HPR pins͸
200kΩ(typ)ͰHVSSʹϓϧμ΢ϯ͞Ε·͢ɻ͜ͷઃఆͰ͸AK4645ͷHP-Ampͱ֎෦ͷ୯ిݯHP-AmpΛWired
ORͰ઀ଓ͢Δ͜ͱ͕ՄೳͰ͢ɻ͜ͷϞʔυͰͷফඅిྲྀ͸20µA(typ)Ͱ͢ɻ
PMVCM
x
0
1
1
PMHPL/R
0
0
1
1
HPMTN
HPZ
Mode
x
0
Power-down & Mute
x
1
Power-down
0
x
Mute
1
x
Normal Operation
Table 57. HP-Amp Mode Setting (x: Don’t care)
HPL/R pins
HVSS
Pull-down by 200kΩ
HVSS
Normal Operation
Default
MS0543-J-00
- 63 -
2006/09