AK4636 Datasheet, PDF (43/105 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4636]
■ Digital Block
The digital block consists of block diagram as shown in Figure 43. The AK4636 can choose signal process path on a
recording path or on a playback path by setting ADCPF bit, PFDAC bit and PFSDO bit. (Figure 43 ~ Figure 46, Table 21)
PMADC bit
ADC
SDTI
1st Order
HPF1
PMPFIL bit
HPF bit
LPF bit
“1” “0”
ADCPF bit
1st Order
HPF2
1st Order
LPF
EQ2-5 bits
4 Band
EQ
ALC
(Volume)
EQ1 bit
EQ
“0” “1”
PFSDO bit
SDTO
“1” “0”
PMDAC bit
PFDAC bit
DATT
SMUTE
DAC
(1) ADC: Include a Digital Filter (LPF) for ADC as shown in “FILTER CHRACTERISTICS”.
(2) DAC: Include a Digital Filter (LPF) for DAC as shown in “FILTER CHRACTERISTICS”.
(3) HPF1/2: High Pass Filter. Applicable to use as Wind-Noise Reduction Filter. (See “Programmable Filter”.)
(4) LPF: Low Pass Filter (See “Digital Programmable Filter”.)
(5) 4-Band EQ: Applicable to use as an Equalizer or Notch Filter. (See “Digital Programmable Filter”.)
(6) ALC: Input Digital Volume with ALC function. (See “Input Digital Volume” and “ALC”.)
(7) EQ: Applicable to use as an Equalizer or Notch Filter. (See “Digital Programmable Filter”.)
(8) DATT: 4-step Digital Volume for playback path. (See “Digital Volume 2”)
(9) SMUTE: Soft mute. (See “Soft Mute”.)
Figure 43. Digital Block Path Select
MS1012-E-01
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2010/08