AK7735EQ Datasheet, PDF (24/142 Pages) Asahi Kasei Microsystems – Dual DSP with 4chADC + 4chDAC + 4chSRC

[AK7735]
■ DAC Block
(Ta=-40 ~ 85C; AVDD=3.0~3.6V; LVDD=3.0~3.6V; TVDD=1.7~3.6V; VDD33=3.0~3.6V;
AVSS=DVSS1=DVSS2=DVSS3=0V)
1. Sharp Roll-Off Filter (DASD bit = “0”, DASL bit = “0”)
fs=48kHz
Parameter
Symbol
Min.
Typ.
Max.
Unit
SHARP ROLL-OFF
Passband * 27
0.05dB
PB
3.0dB
PB
0
21.7
kHz
23.4
kHz
Passband Ripple * 28
PR
-0.0032
0.0032
dB
Stopband * 27
SB
26.3
kHz
Stopband Attenuation * 30, * 31
SA
80.0
dB
Group Delay * 29
GD
27.3
1/fs
Digital Filter + SCF + SMF * 30
Frequency Response : 0  20.0kHz
-0.3
0.1
dB
fs=96kHz
Parameter
Symbol
Min.
Typ.
Max.
Unit
SHARP ROLL-OFF
Passband * 27
0.05dB
PB
3.0dB
PB
0
43.5
kHz
46.8
kHz
Passband Ripple * 28
PR
-0.0032
0.0032
dB
Stopband * 27
SB
52.5
kHz
Stopband Attenuation * 30, * 31
SA
80.0
dB
Group Delay * 29
GD
27.3
1/fs
Digital Filter + SCF + SMF * 30
Frequency Response : 0  40.0kHz
-0.5
0.1
dB
fs=192kHz
Parameter
Symbol
Min.
Typ.
Max.
Unit
SHARP ROLL-OFF
Passband * 27
0.05dB
PB
3.0dB
PB
0
87.0
kHz
93.6
kHz
Passband Ripple * 28
PR
-0.0032
0.0032
dB
Stopband * 27
SB
105.0
kHz
Stopband Attenuation * 30, * 31
SA
80.0
dB
Group Delay * 29
GD
27.3
1/fs
Digital Filter + SCF + SMF * 30
Frequency Response : 0  80.0kHz
-1.9
0.1
dB
Notes
* 27. The passband and stopband frequencies are proportional to fs (sampling rate).
“PB = 0.4535  fs, SB = 0.546  fs”
* 28. Pass-band gain amplitude of double over sampling filter at the first step of Interpolator.
* 29. Delay time caused by the digital filter calculation. This time is measured from setting of the
16/20/24/32-bit impulse data to the input registers to output of the analog peak signal.
* 30. The output level with a 1kHz, 0dB sine wave input is defined as 0dB.
* 31. Band width of Stopband Attenuation ranges from 0Hz to fs.
016014707-E-00
- 24 -
2016/12