AK4953A Datasheet, PDF (38/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
■ Digital Block
The digital block consists of the blocks shown in Figure 30. Recording path and playback path is selected by setting
ADCPF bit, PFDAC bit and PFSDO bit. (Figure 31 ~ Figure 34, Table 25)
PMADL/R bit or
PMDML/R bit
ADC
SDTI
HPFAD bit
1st Order
HPF1
ADCPF bit
“1” “0”
PMPFIL bit
HPF bit
LPF bit
1st Order
HPF2
1st Order
LPF
EQ5-2 bit
ALC1/2 bits
4 Band
EQ
ALC
(Volume)
EQ1 bit
“0” “1”
PFSDO bit
SDTO
1 Band
EQ
“1” “0”
PMDAC bit
PFDAC bit
DVL/R
SMUTE
DAC
(1) ADC: Includes the Digital Filter (LPF) for ADC as shown in “FILTER CHRACTERISTICS”.
(2) HPF1: Includes the Digital Filter (HPF) for ADC as shown in “FILTER CHRACTERISTICS”.
(3) DAC: Includes the Digital Filter (LPF) for DAC as shown in “FILTER CHRACTERISTICS”.
(4) HPF2: High Pass Filter. Applicable for use as Wind-Noise Reduction Filter. (See “Digital Programmable Filter
Circuit”)
(5) LPF: Low Pass Filter (See “Digital Programmable Filter Circuit”)
(6) 4 Band EQ: Applicable for use as Equalizer or Notch Filter. (See “Digital Programmable Filter Circuit”)
(7) Volume: Input Digital Volume with ALC function. (See “Input Digital Volume” and “ALC Operation”)
(8) 1 Band EQ: Applicable for use as Equalizer or Notch Filter. (See “Digital Programmable Filter Circuit”)
(9) DVL/R, SMUTE: Digital volume with soft mute function for playback path (See “Output Digital Volume2” )
Figure 30. Digital Block Path Select
MS1252-E-00
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2010/10