AK4648 Datasheet, PDF (63/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
HPG bit Setting
IN4+/IN4− Æ HPL/HPR
0dB
−6dB
(default)
Table 48. IN4+/IN4− Input Æ Headphone-Amp Output Gain (typ.)
SPKG2-0 bits
IN4+/IN4- Æ SPLP/SPLN or SPRP/SPRN
ALC bit = “0”
ALC bit = “1”
000
−1.59dB
+0.41dB
(default)
001
+0.41dB
+2.41dB
010
+4.63dB
+6.63dB
011
+6.63dB
+8.63dB
100
-6dB
-4dB
101
-12dB
-10dB
110
N/A
N/A
111
N/A
N/A
Table 49. IN4+/IN4- Input Æ Speaker-Amp Output Gain (typ.), N/A: Not available
■ Analog Mixing: Mono Input (AIN3 bit = “0”: MIN pin)
When AIN3 bit = “0”, MIN pin is used as mono input for analog mixing. When the PMMIN bit is set to “1”, the mono
input is powered-up. When the MINS bit is set to “1”, the input signal from the MIN pin is output to Speaker-Amp. When
the MINH bit is set to “1”, the input signal from the MIN pin is output from Headphone-Amp. When the MINL bit is set
to “1”, the input signal from the MIN pin is output from the stereo line output amplifier. The external resister Ri adjusts
the signal level of MIN input. Table 50, Table 51, Table 52, and Table 53 show the typical gain example at R_i = 20kΩ.
This gain is in inverse proportion to R_i .
Analog Input
Ri
MIN pin
MINL bit
MINH bit
MINS bit
Figure 43. Block Diagram of MIN pin
LOUT/LOP pin,
ROUT/LON pin
HPL, HPR pin
SPLP/SPLN pin,
SPRP/SPRN pin
LOVL bit
MIN Æ LOUT/ROUT
0
0dB
(default)
1
+2dB
Table 50. MIN Input Æ LOUT/ROUT Output Gain (typ.) at R_i = 20kΩ
LOVL bit
MIN Æ LOP/LON
0
+6dB
(default)
1
+8dB
Table 51. MIN Input Æ LON/LOP Output Gain (typ.) at R_i = 20kΩR
HPG bit Setting
MIN Æ HPL/HPR
0dB
−20dB
Table 52. MIN Input Æ Headphone-Amp Output Gain (typ.) at R_i = 20kΩ
MS0625-E-01
- 63 -
2007/06