AK7770EQ Datasheet, PDF (10/22 Pages) Asahi Kasei Microsystems – Audio DSP with Multi-Channel Audio CODEC

[AK7770]
ANALOG CHARACTERISTICS
■ ADC1/2
(Ta=25 °C; AVDD=HVDD=DVDD=3.3V; DVDD18=1.8V; VSS1=VSS2=VSS3=0V; Signal frequency = 1kHz;
Measurement bandwidth =20Hz~20kHz , fs=48kHz fs; SRC reset; unless otherwise specified)
Parameter
min
typ
max
Units
Feedback Resistance
10
30
kΩ
Pre-AMP S/(N+D)
(Note 6)
99
dB
S/N (A-weighted)
(Note 6)
105
dB
Load Capacitance
20
pF
Resolution
24
Bits
Pre-AMP Dynamic characteristics
+
S/(N+D) fs = 48kHz (-1dBFS)
74
84
dB
ADC1 Dynamic range fs = 48kHz (A-weighted)
ADC2
(Note 7, Note 8)
88
96
dB
S/N fs = 48kHz (A-weighted)
(Note 7)
85
96
dB
Interchannel Isolation( (f=1kHz)
(Note 9)
85
100
dB
DC Accuracy
ADC1 Gain mis-match between channels
0.1
0.3
dB
ADC2 Analog input
Input voltage
2.05
2.2
2.35
Vp-p
Note 6. Value measured with an input resistance of 47kΩ and a feedback resistance of 16kΩ with a 2Vrms input voltage.
Note 7. The value measured through the pre-amp and ADC with an input resistance of 47kΩ and a feedback resistance of
16kΩ with a 2Vrms input voltage.
Note 8. S/(N+D) with an input signal of -60dBFS
Note 9. Isolation between AINL1-4, AINR1-4 with a -1dBFS input signal.
Note 10. When the SRC on DIT operate asynchronously, the performance may be degraded.
■ DAC1/2
(Ta= 25°C; AVDD=HVDD=DVDD=3.3V; DVDD18=1.8V; VSS1=VSS2=VSS3=0V;
Signal frequency = 1kHz; Measurement bandwidth =20Hz~20kHz, fs=48kHz fs; SRC reset; unless otherwise
specified)
Parameter
min
typ
max
Units
DAC1 Resolution
24
Bits
DAC2
Dynamic characteristics
S/(N+D)
(0 dBFS)
78
88
dB
Dynamic range (A-weighted) (Note 11)
92
100
dB
S/N (A-weighted)
92
100
dB
Interchannel Isolation (f=1kHz) (Note 12)
90
100
dB
DC Accuracy
Gain mis-match between channels
0.2
0.5
dB
Analog output
Output voltage
(Note 13)
2.02
2.18
2.34
Vp-p
Load resistance
5
kΩ
Load capacitance
30
pF
Note 11. S/(N+D) with a -60dBFS input signal
Note 12. Isolation between Lch-Rch between each DAC
Note 13. Full scale output voltage
MS0699-E-01-PB
- 10 -
2008/06