ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 63

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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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
This gain is in inverse proportion to R
MS0625-E-01
Analog Mixing: Mono Input (AIN3 bit = “0”: MIN pin)
Analog Input
Table 49. IN4+/IN4- Input
SPKG2-0 bits
Table 52. MIN Input
Table 50. MIN Input
000
001
010
011
100
101
110
111
HPG bit Setting
Table 51. MIN Input
Table 48. IN4+/IN4 − Input
HPG bit Setting
0dB
LOVL bit
LOVL bit
0dB
0
1
0
1
i
.
MIN pin
Ri
Figure 43. Block Diagram of MIN pin
IN4+/IN4-
ALC bit = “0”
+0.41dB
+4.63dB
+6.63dB
− 1.59dB
-12dB
Headphone-Amp Output Gain (typ.) at R
-6dB
N/A
N/A
Speaker-Amp Output Gain (typ.), N/A: Not available
LOUT/ROUT Output Gain (typ.) at R
LON/LOP Output Gain (typ.) at R
IN4+/IN4 −
MIN
MIN
MIN
SPLP/SPLN or SPRP/SPRN
Headphone-Amp Output Gain (typ.)
- 63 -
− 20dB
LOUT/ROUT
+2dB
+6dB
+8dB
0dB
− 6dB
LOP/LON
HPL/HPR
HPL/HPR
ALC bit = “1”
MINH bit
MINS bit
MINL bit
+0.41dB
+2.41dB
+6.63dB
+8.63dB
-10dB
-4dB
N/A
N/A
(default)
(default)
i
= 20k Ω R
(default)
i
LOUT/LOP pin,
ROUT/LON pin
HPL, HPR pin
SPLP/SPLN pin,
SPRP/SPRN pin
= 20k Ω
i
= 20k Ω
(default)
[AK4648]
i
= 20k Ω.
2007/06