AK7755EN_16 Datasheet, PDF (13/109 Pages) Asahi Kasei Microsystems – DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

[AK7755]
3. MIC Amp + ADC
Ta= 25C; AVDD=TVDD=3.3V; DVDD=1.2V; AVSS=DVSS=0V;
Signal Frequency 1kHz; Sampling Rate fs=48kHz; Measurement Frequency =20Hz to 20kHz
Sampling Rate fs=96kHz; Measurement Frequency =20Hz to 40kHz
CKM mode0(CKM[2:0]= “000”); BITFS[1:0]= “00” (64fs); Differential Input Mode
Parameter
min
typ
max
MIC Amp Resolution
24
+ ADC _{Dynamic Characteristics (Differential Input mode)}
Fs=48kHz (Note 12)
80
91
S/(N+D) Fs=48kHz (Note 13)
88
(-1dBFS) Fs=96kHz (Note 12)
89
Fs=96kHz (Note 13)
85
Fs=48kHz (A-weighted) (Note 12)
94
102
Dynamic
Range
(Note 8)
Fs=48kHz (A-weighted) (Note 13)
Fs=96kHz (Note 12)
Fs=96kHz (Note 13)
93
95
89
Fs=48kHz (A-weighted) (Note 12)
94
102
S/N
Fs=48kHz (A-weighted) (Note 13)
Fs=96kHz (Note 12)
93
95
Fs=96kHz (Note 13)
89
Inter-Channel Isolation (Note 9)
90
105
DC accuracy (Differential Input)
Channel Gain Mismatch
0.0
0.3
Analog Input
Input Voltage
(Note 12)
±2.0 ±2.2
±2.4
(Differential Input) (Note 10) (Note 13)
±0.277
Input Voltage
(Note 12)
2.0
2.2
2.4
(Single-ended Input) (Note 11) (Note 13)
0.277
Note 8. S/(N+D) when -60dB FS signal is applied.
Note 9. Indicates inter-channel isolation between Lch and Rch when –1dBFS signal is input.
Note 10. INP1/INN1 and INP2/INN2 pins.
Note 11. IN1, IN2, IN3 and IN4 pins.
Note 12. MGNL/R[3:0] bits = 0h (0dB)
Note 13. MGNL/R[3:0] bits = 9h (18dB)
Unit
Bit
dB
dB
dB
dB
dB
Vp-p
Vp-p
014006643-E-00
- 13 -
2014/10