AK4644 Datasheet, PDF (53/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV-AMP

ASAHI KASEI
[AK4644]
„ Analog Mixing: Mono Input (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 MINH bit is set to “1”, the input signal from the MIN pin is output to Headphone-Amp.
When the MINL bit is set to “1”, the input signal from the MIN pin is output to the stereo line output amplifier. The
external resister Ri adjusts the signal level of MIN input. Table 44, Table 45 and Table 46 show the typical gain example
at R_i = 20kΩ. This gain is in inverse proportion to R_i .
Ri
MIN
MINL
LOUT/RCP pin,
ROUT/RCN pin
MINH
HPL, HPR pin
Figure 43. Block Diagram of MIN pin
LOVL bit
MIN Æ LOUT/ROUT
0
0dB
Default
1
+2dB
Table 44. MIN Input Æ LOUT/ROUT Output Gain (typ) at R_i = 20kΩ
LOVL bit
MIN Æ RCP/RCN
0
+0dB
Default
1
+2dB
Table 45. MIN Input Æ RCP/RCN Output Gain (typ) at R_i = 20kΩ
HPG bit
MIN Æ HPL/HPR
0
−20dB
Default
1
−16.4dB
Table 46. MIN Input Æ Headphone-Amp Output Gain (typ) at R_i = 20kΩ
MS0477-E-01
- 53 -
2006/10