AK4673 Datasheet, PDF (58/107 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP and Touch Screen Controller

[AK4673]
■ Analog Mixing: Mono Input (AIN3 bit = “0”: MIN pin)
When AIN3 bit = “0”, the 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 47, Table 48 and Table 49 show the typical gain example
at R_i = 20kΩ. This gain is in inverse proportion to R_i .
Ri
MIN
MINL
LOUT/LOP pin,
ROUT/LON pin
MINH
HPL, HPR pin
Figure 7. Block Diagram of MIN pin
LOVL bit
MIN Æ LOUT/ROUT
0
0dB
(default)
1
+2dB
Table 47. MIN Input Æ LOUT/ROUT Output Gain (typ) at R_i = 20kΩ
LOVL bit
MIN Æ LOP/LON
0
+6dB
(default)
1
+8dB
Table 48. MIN Input Æ LOP/LON Output Gain (typ) at R_i = 20kΩ
HPG bit
MIN Æ HPL/HPR
0
−20dB
(default)
1
−16.4dB
Table 49. MIN Input Æ Headphone-Amp Output Gain (typ) at R_i = 20kΩ
MS0670-E-00
- 58 -
2007/09