AK4387 Datasheet, PDF (4/21 Pages) Asahi Kasei Microsystems – 106dB 192kHz 24-Bit 2ch ΔΣ DAC

ASAHI KASEI
[AK4387]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=5.0V; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz; 24bit Input Data;
Measurement frequency=20Hz ∼ 20kHz; R_L ≥5kΩ; External circuit: Figure 9 (Example 2); unless otherwise specified)
Parameter
min
Typ
max
Units
Resolution
24
Bits
Dynamic Characteristics
(Note 3)
THD+N
fs=44.1kHz
0dBFS
-90
-80
dB
BW=20kHz
-60dBFS
-42
-
dB
fs=96kHz
0dBFS
-90
-
dB
BW=40kHz
-60dBFS
-39
-
dB
fs=192kHz
0dBFS
-85
-
dB
BW=40kHz
-60dBFS
-39
-
dB
Dynamic Range (-60dBFS with A-weighted)
(Note 4)
98
106
dB
S/N
(A-weighted)
(Note 5)
98
106
dB
Interchannel Isolation (1kHz)
90
100
dB
Interchannel Gain Mismatch
0.2
0.5
dB
DC Accuracy
Gain Drift
100
-
ppm/°C
Output Voltage
(Note 6) 2.75
2.95
3.15
Vpp
Load Resistance
(Note 7)
5
kΩ
Load Capacitance
25
pF
Power Supplies
Power Supply Current (AVDD+DVDD)
Normal Operation (RSTN pin = “H”, fs≤96kHz)
Normal Operation (RSTN pin = “H”, fs=192kHz)
Power-Down Mode (RSTN pin = “L”)
(Note 8)
17
27
mA
20
32
mA
60
150
µA
Note 3. Measured by Audio Precision (System Two). Refer to the evaluation board manual.
Note 4. 100dB at 16bit data.
Note 5. S/N does not depend on input bit length.
Note 6. Full-scale voltage (0dB). Output voltage scales with the voltage of AVDD,
AOUT (typ.@0dB) = 2.95Vpp × AVDD/5.
Note 7. For AC-load.
Note 8. All digital inputs including clock pins (MCLK, BICK and LRCK) are held AVDD, DVDD or VSS.
SHARP ROLL-OFF FILTER CHARACTERISTICS
(Ta = 25°C; AVDD=DVDD = 4.5 ∼ 5.5V; fs = 44.1kHz; DEM = OFF)
Parameter
Symbol
min
typ
max
Units
Digital filter
Passband
±0.05dB (Note 9)
-6.0dB
PB
0
20.0
kHz
-
22.05
-
kHz
Stopband
(Note 9)
SB
24.1
kHz
Passband Ripple
PR
± 0.02
dB
Stopband Attenuation
SA
54
dB
Group Delay
(Note 10)
GD
-
19.3
-
1/fs
Digital Filter + LPF
Frequency Response 20.0kHz fs=44.1kHz
FR
40.0kHz fs=96kHz
FR
80.0kHz fs=192kHz
FR
-
± 0.03
-
dB
-
± 0.03
-
dB
-
± 0.03
-
dB
Note 9. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs.
Note 10. The calculating delay time which occurred by digital filtering. This time is from setting the 16/24bit data
of both channels to input register to the output of analog signal.
MS0429-E-00
-4-
2005/09