AK4490 Datasheet, PDF (10/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490]
8. Electrical Characteristics
■ Analog Characteristics
(Ta=25C; AVDD=DVDD=3.3V; AVSS=DVSS=VSSL/R=0V; VREFHL/R=VDDL/R=5V, VREFLL/R=
VSSL/R=0V; Input data = 24bit; R_L  1k; BICK=64fs; Signal Frequency = 1kHz; Sampling Frequency =
44.1kHz; Measurement bandwidth = 20Hz ~ 20kHz; External Circuit: Figure 41; unless otherwise specified.)
Parameter
min
typ
max Unit
Resolution
-
-
32
Bits
Dynamic Characteristics (Note 6)
THD+N
fs=44.1kHz 0dBFS
BW=20kHz 60dBFS
-
-112
-105
dB
-
-57
-49
dB
fs=96kHz 0dBFS
BW=40kHz 60dBFS
-
-109
-100
dB
-
-54
-44
dB
fs=192kHz 0dBFS
BW=40kHz 60dBFS
BW=80kHz 60dBFS
Dynamic Range (60dBFS with A-weighted) (Note 7)
115
S/N (A-weighted)
(Note 8) 115
S/N (Mono mode, A-weighted)
118
Interchannel Isolation (1kHz)
110
-106
-100
dB
-54
-44
dB
-51
-41
dB
120
-
dB
120
-
dB
123
-
dB
120
-
dB
DC Accuracy
Interchannel Gain Mismatch
Gain Drift
Output Voltage
Load Capacitance
Load Resistance
(Note 9)
(Note 10)
(Note 11)
-
-
2.65
-
1
0.15
0.3
dB
-
20 ppm/C
2.8
2.95 Vpp
-
25
pF
-
-
k
Power Supplies
Power Supply Current
Normal operation (PDN pin = “H”)
VDDL/R
AVDD
DVDD (fs= 44.1kHz)
DVDD (fs= 96kHz)
DVDD (fs = 192kHz)
22
32
mA
0.6
1.2
mA
-
10
14
mA
-
15
20
mA
-
17
23
mA
Power down (PDN pin = “L”)
(Note 12)
AVDD+VDDL/R+DVDD
-
10
100
A
Note 6. Measured by Audio Precision, System Two. Averaging mode. Refer to the evaluation board manual.
Note 7. Figure 41 External LPF Circuit Example 2. 101dB for 16-bit data and 118dB for 20-bit data.
Note 8. Figure 41 External LPF Circuit Example 2. S/N does not depend on input data size.
Note 9. The voltage on (VREFH  VREFL) is held +5V externally.
Note 10. Full-scale voltage(0dB). Output voltage scales with the voltage of (VREFHL/R  VREFLL/R).
AOUT (typ.@0dB) = (AOUT+)  (AOUT) = 2.8Vpp  (VREFHL/R  VREFLL/R)/5.
Note 11. Regarding Load Resistance, AC load is 1k (min) with a DC cut capacitor (Figure 41). DC load is
1.5k ohm (min) without a DC cut capacitor (Figure 40). The load resistance value is with respect to
ground. Analog characteristics are sensitive to capacitive load that is connected to the output pin.
Therefore the capacitive load must be minimized.
Note 12. In the power down mode. The PSN pin = DVDD, and all other digital input pins including clock pins
(MCLK, BICK and LRCK) are held DVSS.
MS1648-E-03
- 10 -
2014/11