AK7722 Datasheet, PDF (11/28 Pages) Asahi Kasei Microsystems – 24bit 4ch ADC + 24bit 4ch DAC with Audio DSP

[AK7722]
ANALOG CHARACTERISTICS (CODEC)
■ ADC Characteristics
1. ADC1
(Ta=25ºC; AVDD=DVDD=3.3V, BITCLK=64fs; Signal frequency 1kHz; Measurement frequency = 20Hz~20kHz
@fs=48kHz; CKM mode0 (CKM[2:0]=000); BITFS[1:0]=00(64fs); with Differential Input; in SRC reset, Unless
otherwise specified.)
Parameter
min
typ
max
Unit
ADC
Resolution
24
Bits
Section Dynamic Characteristics
S/(N+D) (-1dBFS)
82
90
dB
Dynamic Range (A-weighted)
(Note 5)
88
96
dB
S/N (A-weighted)
88
96
dB
Inter-Channel Isolation (fin=1kHz) (Note 6)
90
110
dB
DC accuracy
Channel Gain Mismatch
0.0
0.3
dB
Analog Input
Input Voltage (Differential)
(Note 7)
±2.00
±2.20
±2.40
Vp-p
Input Voltage (Single-ended)
(Note 8)
2.00
2.20
2.40
Vp-p
Input Impedance
41
62
kΩ
Note 5. S/(N+D) when -60dB FS signal is applied.
Note 6. Inter-channel isolation between AINR and AINL with –1dB FS signal input.
Note 7. AINL1P, AINL1N, AINR1P, AINR1N, AINL2P, AINL2N, AINR2P and AINR2N pins
Note 8. AINL3, AINR3, AINL4, AINR4, AINL5, AINR5, AINL6 and AINR6 pins.
Full scale output voltage is FS=AVDD×2.2/3.3.
2. ADC2
(Ta=25ºC; AVDD=DVDD=3.3V, BITCLK=64fs; Signal frequency 1kHz; Measurement frequency =20Hz~20kHz
@fs=48kHz; CKM mode0 (CKM[2:0]=000); BITFS[1:0]=00(64fs); in SRC reset, Unless otherwise specified.)
Parameter
min
typ
max
Unit
ADC
Resolution
24
Bits
Section Dynamic Characteristics
S/(N+D) (-1dBFS)
80
88
dB
Dynamic Range (A-weighted)
(Note 9)
87
95
dB
S/N (A-weighted)
87
95
dB
Inter-Channel Isolation (fin=1kHz) (Note 10)
90
110
dB
DC accuracy
Channel Gain Mismatch
0.1
0.3
dB
Analog Input
Input Voltage
(Note 11)
2.00
2.20
2.40
Vp-p
Input Impedance
41
62
kΩ
Note 9. S/(N+D) when -60dB FS signal is applied.
Note 10. Inter-channel isolation between AINR and AINL with –1dB FS signal input.
Note 11. Full scale output voltage is FS=AVDD×2.2/3.3.
MS1328-E-00-PB
11
2011/09