AKD4955-A Datasheet, PDF (48/89 Pages) Asahi Kasei Microsystems – AK4955 Evaluation Board Rev.3

[AKD4955-A]
Measurement Result
[Measurement condition]
• Measurement Unit : Audio Precession System Two Cascade
• MCLK
: 12.2880MHz
• BICK
: 64fs
• fs
: 48 kHz
• Bit
: 24bit
• Power Supply
: AVDD = LVDD = SVDD = 3.3V, DVDD = TVDD = 1.8V
• Band Width
: 20 Hz ~ 20 kHz
• Measurement Mode : External Slave Mode
• Temperature
: Room Temperature
[Measurement Result]
1. ADC
a). LIN1/RIN1 pins, MGAIN bits = “+18dB”
Parameter
S/(N+D)
(-1dBFS Input)
D-Range
(-60dB Input, A-weighted)
S/N
(No Signal, A-weighted)
Result
Lch / Rch
Unit
81.0 / 81.5
dB
88.8 / 88.7
dB
88.7 / 88.7
dB
b). LIN2/RIN2 pins, MGAIN bits = “0dB”
Parameter
S/(N+D)
(-1dBFS Input)
D-Range
(-60dB Input, A-weighted)
S/N
(No Signal, A-weighted)
Result
Lch / Rch
Unit
81.7 / 82.2
dB
97.7 / 97.8
dB
98.0 / 97.8
dB
2. DAC
a). LOUT/ROUT pins, LVCM bits = “01”, R_L=10kΩ
Parameter
Result
Lch / Rch
Unit
S/(N+D)
(-3dBFS Input)
87.5 / 87.6
dB
S/N
(No Signal, A-weighted)
92.6 / 92.5
dB
b). SPP/SPN pins, SPKG bits = “01”, R_L=8Ω
Parameter
Result
Unit
S/(N+D)
(-0.5dBFS Input)
80.5
dB
S/N
(No Signal, A-weighted)
96.7
dB
<KM104703>
- 48 -
2011/08