AK4753 Datasheet, PDF (48/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[AK4753]
■ SAR 8-bit ADC
The AK4753 incorporates a 8-bit successive approximation resistor A/D converter for DC measurement.
By connecting potentiometers, the gain of DATT can be controlled by SAIN1and the gain of EQ1 can be controlled by
SAIN2.
The A/D converter output for the SAIN1 pin is a straight binary format as shown in Table 39.
Input Voltage
Output Code Attenuation Level
(AVDD−1.0LSB) ~ AVDD
00H
0dB
(AVDD−2.0LSB) ~ (AVDD−1.0LSB)
01H
-0.5dB
:
:
:
1.0LSB ~ 2.0LSB
FEH
-127dB
0 ~ 1.0LSB
FFH
MUTE (−∞)
Table 39. Output Code for the SAIN1 Pin
The A/D converter output for the SAIN2 pin is a straight binary format as shown in Table 40.
Input Voltage
Output Code
(AVDD−1.0LSB) ~ AVDD
00H
(AVDD-2.0LSB) ~ (AVDD−1.0LSB)
01H
:
:
1.0LSB ~ 2.0LSB
FEH
0 ~ 1.0LSB
FFH
Table 40. Output Code for the SAIN2 pin
Output Code
Gain@EQ1
00H ~ 04H
05H ~ 09H
+12.0dB
0AH ~ 0EH
+11.5dB
0FH ~ 13H
+11.0dB
14H ~ 18H
+10.5dB
:
:
7DH ~ 81H
0dB
:
:
E6H ~ EAH
-10.5dB
EBH ~ EFH
-11.0dB
F0H ~ F4H
-11.5dB
F5H ~ F9H
FAH ~ FFH
-12.0dB
Table 41. Gain Setting of EQ1
K₁@EQ1
2.981
2.758
2.548
2.350
:
0
:
-0.701
-0.718
-0.734
-0.749
SA2SEL bit
K₁
0
DSP1
1
DSP2
Table 42. Source for the SAIN2 pin
(default)
MS1311-E-00
SA2 bit
SAIN2 pin
0
Disable
(default)
1
Enable
Table 43. Configuration for the SAIN2 pin
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2011/07