AK4695 Datasheet, PDF (10/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
Parameter
min
typ
max
Unit
ADC Analog Input Characteristics: MICIN0L/R, MICIN1L/R, MICIN2L/R, MICIN3L/R, AUXINL/R pins → ADC
→ Programmable Filter (IVOL=0dB, EQ=ALC=OFF) → SDTO1, SDTO2;
MMODE bit = “1”; C_ext1 = 1μF, C_ext2 = 1nF (Note 11)
Resolution
-
-
24
Bits
Input Voltage (Note 12)
(Note 13)
-24
-23
-22
dBV
(Note 14)
-15
-14
-13
dBV
S/(N+D) (1dBFS)
(Note 13)
76
86
(Note 14)
-
93
-
dBFS
-
dBFS
D-Range (60dBFS, A-weighted)
(Note 13)
(Note 14)
91
-
98
103
-
dB
-
dB
(Note 13)
91
98
-
dB
S/N (A-weighted)
(Note 14)
-
103
-
dB
(Note 15)
-
102
-
dB
Interchannel ^{(L and R channels)}
(Note 13)
(Note 14)
75
-
95
105
-
dB
-
dB
Isolation
(All channels)
(Note 13)
-
(Note 14)
-
90
100
-
dB
-
dB
Interchannel Gain Mismatch
(Note 13)
-
0
0.5
dB
(All channels)
(Note 14)
-
0
0.5
dB
Effective Output Range (Note 13, Note 16)
94.5
-
-
%
PSRR (fin = 1kHz)
(Note 10)
-
50
-
dB
Crosstalk
(Note 17)
-
-100
-
dB
Note 10. PSRR is applied to AVDD with 100mpVpp sine wave. When MIC Power is supplied.
Note 11. Measured by the circuit shown below (Figure 2). (C_ext2 can also be placed between the input pin and VSS1.)
Cext1
Signal Input
ADC Input
Cext2
Figure 2. ADC Analog Characteristics Measurement Circuit
Note 12. The full-scale input voltage is proportional to AVDD.
Note 13. M0/1/2/3GN3-0 bits = “1100” (+21dB)
Note 14. M0/1/2/3GN3-0 bits = “0110” (+12dB)
Note 15. M0/1/2/3GN3-0 bits = “0110” (+12dB), ADPSM bit = “1” (Low power operation mode)
Note 16. AVDD = 2.7V ~ 3.5V, HPFAD bit = “1”. It becomes 100% when the microphone gain is +13.5dB
(M0/1/2/3GN3-0 bits = “0111”) or less.
Note 17. A playback crosstalk of when the microphone amplifier and ADC are in operation (MGAIN=+21dB, 0dBFS
input). (The reference voltage is full-scale input voltage of ADC)
MS1463-E-01
- 10 -
2014/12