AK4645AEZ Datasheet, PDF (56/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

HP-AMP
AK4645A
CR
0.22μ
10Ω
Headphone
16Ω
[AK4645A]
Figure 51. ϔουϑΥϯΞϯϓͷ֎෇͚ճ࿏ྫ
fc [Hz]
fc [Hz]
Output Power [mW]@0dBFS
HPG bit R [Ω]
C [μF]
BOOST
=OFF
BOOST
=MIN
fs=44.1kHz
HVDD=3.0V HVDD=3.3V HVDD=5V
AVDD=3.0V AVDD=3.3V AVDD=3.3V
0
220
45
17
25.3
30.6
30.6
100
100
43
0
6.8
100
70
28
12.5
15.1
15.1
47
149
78
16
100
50
19
6.3
7.7
7.7
47
106
47
0
220
45
1
100
100
100
22
62
10
137
17
43
51
(Note 40)
62
(Note 40)
70
25
1.1
1.3
1.3
69
Note 39. 16Ωෛՙ୺Ͱͷग़ྗిྗͰ͢ɻ
Note 40. ग़ྗ৴߸͸ΫϦοϓ͠·͢ɻ
Table 48. ֎෇͚ճ࿏ྫ
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 49. ϔουϑΥϯΞϯϓͷίϞϯిѹ
ʻ֎෦ϔουϑΥϯΞϯϓͱͷWired ORʼ
PMVCM=PMHPL=PMHPR bits = “0”, HPZ bit = “1”ͷͱ͖ɺHP-Amp͸ύϫʔμ΢ϯ͠ɺHPL, HPR pins͸
200kΩ(typ)ͰHVSSʹϓϧμ΢ϯ͞Ε·͢ɻ͜ͷઃఆͰ͸AK4645AͷHP-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 50. HP-Amp Mode Setting (x: Don’t care)
HPL/R pins
HVSS
Pull-down by 200kΩ
HVSS
Normal Operation
(default)
MS0986-J-00
- 56 -
2008/07