ak5701 AKM Semiconductor, Inc., ak5701 Datasheet - Page 33

• Manufacturer Part Number: ak5701
• Description: 16-bit ?? Stereo Adc With Pll & Mic-amp
• Manufacturer: AKM Semiconductor, Inc.

■
The ADC has a digital high pass filter for DC offset cancellation. The cut-off frequency of the HPF is selected by HPF1-0
bits
■
The AK5701 has input selector. When MDIF1 and MDIF2 bits are “0”, INL and INR bits select LIN1/LIN2 and
RIN1/RIN2, respectively. When MDIF1 and MDIF2 bits are “1”, LIN1, RIN1, LIN2 and RIN2 pins become LIN+, LIN−,
RIN− and RIN+ pins respectively. In this case, full-differential input is available
MS0404-E-02
Digital High Pass Filter
MIC/LINE Input Selector
(Table
MDIF1 bit
0
1
18) and scales with sampling rate (fs). The default value is 3.4Hz (@fs=44.1kHz).
HPF1 bit
0
0
1
1
LIN1/LIN+ pin
RIN1/ LIN − pin
RIN2/ RIN+ pin
LIN2/ RIN − pin
MDIF2 bit
0
1
0
1
HPF0 bit
Table 18. Digital HPF Cut-off Frequency (N/A: Not available)
0
1
0
1
Table 19. MIC/Line In Path Select (N/A: Not available)
AK5701
INL bit
Figure 36. Mic/Line Input Selector
fs=44.1kHz
0
1
0
1
x
x
13.6Hz
3.4Hz
6.8Hz
N/A
MDIF1 bit
MDIF2 bit
INR bit
INL bit
- 33 -
INR bit
0
1
0
1
x
x
0
1
x
fs=22.05kHz
1.7Hz
3.4Hz
6.8Hz
N/A
fc
LIN+/−
LIN+/−
LIN1
LIN1
LIN2
LIN2
LIN1
N/A
N/A
Lch
(Figure
fs=11.025kHz
0.85Hz
1.7Hz
3.4Hz
ADC Lch
ADC Rch
N/A
37).
RIN+/−
RIN+/−
RIN1
RIN2
RIN1
RIN2
RIN2
N/A
N/A
Rch
(default)
(default)
[AK5701]
2007/08