ak4683 AKM Semiconductor, Inc., ak4683 Datasheet - Page 40

• Manufacturer Part Number: ak4683
• Description: Asynchronous Multi-channel Audio Codec With Dir/t
• Manufacturer: AKM Semiconductor, Inc.

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The AK4683 includes 6ch stereo input selectors (Figure 21). The input selector is 6 to 1 selector. The AIN2-0 bits set
the input channel (Table 39).
The input ATTs are constructed by adding the input resistor (Ri) for LIN1-6/RIN1-6 pins and the feedback resistor (Rf)
between LOPIN (ROPIN) pin and LISEL (RISEL) pin (Figure 21). The voltage range of the LISEL(RISEL) pin should
be less than typ. 0.62 x AVDD1 (Vpp). If the input voltage of the input selector exceeds typ. 0.62 x AVDD, the input
voltage of the LISEL(RISEL) pins must be attenuated to typ. 0.62 x AVDD1 (Vpp) by the input ATTs. The Table 40
shows the example of Ri and Rf.
MS0427-E-02
Input Selector, Input Attenuator
Input Range
4Vrms
2Vrms
1Vrms
AIN2 bit
Note: Input range of internal ADC is 0.62 x AVDD1 (5V) = 3.1Vpp typ.
0
0
0
0
1
1
1
1
Ri [kΩ]
R i
R i
R i
R i
R i
R i
R i
R i
R i
R i
R i
R i
47
47
47
AIN1 bit
R I N 1
R I N 2
R I N 3
R I N 4
R I N 5
R I N 6
L I N 1
L I N 2
L I N 3
L I N 4
L I N 5
L I N 6
0
0
1
1
0
0
1
1
Table 40. Input ATT example
Table 39. Input Selector
Figure 21. Input ATT
R O P I N
Rf [kΩ]
L O P I N
AIN0 bit
12
24
47
- 40 -
0
1
0
1
0
1
0
1
P r e - A m p
R I S E L
L I S E L
R f
R f
P r e - A m p
ATT Gain [dB]
Input Selector
LIN1 / RIN1
LIN2 / RIN2
LIN3 / RIN3
LIN4 / RIN4
LIN5 / RIN5
LIN6 / RIN6
−11.86
−5.84
None
None
0
T o A D C
T o A D C
Default
LISEL/R pin
(2.88Vpp)
(2.88Vpp)
(2.82Vpp)
1.02Vrms
1.02Vrms
1Vrms
[AK4683]
2007/04