ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 53

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
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
MS0477-E-01
Analog Mixing: Mono Input (MIN pin)
i
= 20kΩ. This gain is in inverse proportion to R
MIN
Table 46. MIN Input
Table 44. MIN Input
Table 45. MIN Input
LOVL bit
LOVL bit
HPG bit
0
1
0
1
0
1
Ri
Figure 43. Block Diagram of MIN pin
Headphone-Amp Output Gain (typ) at R
LOUT/ROUT Output Gain (typ) at R
RCP/RCN Output Gain (typ) at R
i
MIN
.
MIN
MIN
- 53 -
−16.4dB
−20dB
LOUT/ROUT
+2dB
+0dB
+2dB
0dB
RCP/RCN
HPL/HPR
MINH
MINL
Default
Default
Default
i
LOUT/RCP pin,
ROUT/RCN pin
HPL, HPR pin
= 20kΩ
i
= 20kΩ
i
= 20kΩ
[AK4644]
2006/10