AK7754 Datasheet, PDF (10/26 Pages) Asahi Kasei Microsystems – Audio DSP with Stereo CODEC + MIC/HP-AMP

[AK7754]
ANALOG CHARACTERISTICS (CODEC)
■ ADC Characteristics
(Ta=25ºC; AVDD=DVDD=HVDD=3.3V, DVDD18=1.8V; VSS1=VSS2=VSS3=VSS4=0V; BICK1=64fs; Signal
Frequency 1kHz; Measurement frequency =20Hz~20kHz, fs=48kHz, PMSRC=PMHPL=PMHPR bits=“0”, CKM mode
6 (CKM[2:0]=6h) Unless otherwise specified.)
Parameter
min
typ
max
Unit
MIC/LINEIN Amplifier: IN1L,IN1R,IN2L,IN2R,IN3L,IN3R pins
Input Resistance
22.5
30
37.5
kΩ
Gain
Max (MGNL/R2-0, LINL/R2-0 bits = “0H”)
-
0
-
dB
Min (MGNL/R2-0, LINL/R2-0 bits = “7H”)
-
+27
-
dB
Bypass Amplifier: IN1L,IN1R,IN2L,IN2R,IN3L,IN3R pins (MGNL/R2-0 = 0h, LINL/R2-0 = 0h)
Gain
Max (BPGL/R2-0 bit = “0H”)
-
0
-
dB
Min (BPGL/R2-0 bit = “7H”)
-
-21
-
dB
MIC Power Supply: MPWR pin
Output Voltage (Note 6)
2.18
2.3
2.4
V
Output Current
-
-
4
mA
Stereo
ADC
Resolution
Dynamic Characteristics
24
Bits
IN1L/IN1R, IN2L/IN2R, IN3L/IN3R pins→ stereo ADC→ SDOUT1/2/M (VOLADL/R=30h(0dB)
S/(N+D) (-1dBFS)
(Note 12)
70
77
dB
(Note 13)
74
82
dB
Dynamic Range (A-weight)
(Note 12)
74
82
dB
(Note 13)
81
89
dB
S/N (A-weight)
(Note 12)
74
82
dB
(Note 13)
81
89
dB
Inter-Channel Isolation
(fin=1kHz) (Note 7)
(Note 13)
90
105
dB
DC accuracy
Channel Gain Mismatch
0.0
0.3
dB
Analog Input
Input Voltage
Differential
(Note 12)
(Note 8, Note 10) (Note 13)
±1.0
±0.098
±1.1
±1.2
Vpp
Input Voltage
Single-ended
(Note 12)
(Note 9, Note 11) (Note 13)
2.0
0.196
2.2
2.4
Vpp
Note 6. The output voltage is proportional to AVDD. Vout=0.76 x AVDD (typ.)
Note 7. Inter-channel isolation between IN1-3L and IN1-3R pins when –1dB FS signal is input.
Note 8. The input voltage is proportional to AVDD. Vin=±0.030 x AVDD (typ.)@MGNL2-0=MGNR2-0 bits =
“5h”(+21dB), Vin=±0.33 x AVDD (typ.) @MGNL2-0=MGNR2-0 bits = “0h”(+0dB)
Note 9. The input voltage is proportional to AVDD. Vin=0.059 x AVDD (typ.)@MGNL2-0=MGNR2-0 bits =
“5h”(+21dB), Vin=0.67 x AVDD (typ.) @MGNL2-0=MGNR2-0 bits = “0h”(+0dB)
Note 10. IN1P, IN1N, IN2P and IN2N pins
Note 11. IN1L, IN1R, IN2L, IN2R, IN3L and IN3R pins
Note 12. MGNL2-0=MGNR2-0 bits = “5h” (+21dB)
Note 13. MGNL2-0=MGNR2-0 bits = “0h” (+0dB)
MS1138-E-01-PB
10
2012/03