AK7714 Datasheet, PDF (11/48 Pages) Asahi Kasei Microsystems – 20-Bit Audio Codec with DSP and Delay RAM

[ASAHI KASEI]
[AK7714]
(1) Analog characteristics
Electric characteristics
(Unless otherwise specified, Ta = 25°C; AVDD, DVDD, AVB, DVB = 5.0 V; VRADH = AVDD, VRADL = AVSS,
VRDAH = AVDD, VRDAL = AVSS; fs = 44.1 kHz; BITCLK = 64 fs ; XTI = 256 fs;
Signal frequency 1 kHz; measuring frequency = 10 Hz to 20 kHz; 20 bits; DSP section in the reset state; ADC
with all ifferential inputs )
Parameter
Min
ADC
Resolution
section Dynamic characteristics
S/(N+D)
(-0.5 dB) (Note 1)
86
Dynamic range
(A filter ) (Note 2)
94
S/N
(A filter )
94
Inter-channel isolation (f =1 kHz)
90
DC accuracy
Inter-channel gain mismatching
Gain drift
Analog input
Input voltage
(Note 3)
±1.9
Input impedance
DAC
Resolution
section Dynamic characteristics
S/(N+D)
(0 dB)
83
Dynamic range
(-60 dB) (A filter) (Note 2)
93
S/N
(A filter)
93
Inter-channel isolation (f = 1 kHz) (Note 4)
90
DC accuracy
Inter-channel gain mismatching (Note 4)
Gain drift
Analog output
Output voltage
(Note 5)
2.70
Load resistance
5
Typ
92
99
99
105
0.1
50
±2.0
220
89
98
98
105
0.2
50
2.95
Max
20
0.3
±2.1
20
0.5
3.20
Unit
Bits
dB
dB
dB
dB
dB
ppm/°C
Vp-p
kΩ
Bits
dB
dB
dB
dB
dB
ppm/°C
Vp-p
kΩ
Note:
1. Single end input will result in poorer characteristics.
2. Indicates S/(N+D) when -60 dB signal is input.
3. The full scale for analog input voltage (∆AIN = (AIN+) - (AIN-)) can be represented By
(±FS = ±(VRADH-VRADL) × 0.4).
4. Specified for L and R of each DAC.
5. The full-scale voltage (0 dB) and output voltage are proportional to VRDAH voltage.
Analog output voltage (Typ. @ 0 dB) = 2.95 Vpp*VRDAH/5
M0018-E-00
- 11 -
‘98/07