AKD4631 Datasheet, PDF (20/43 Pages) Asahi Kasei Microsystems – AK4631-VN Evaluation board Rev.0

ASAHI KASEI
[AKD4631-VN]
MEASUREMENT RESULTS EXAMPLE
1.AK4631 Mode: EXT mode (Slave)


[Measurement condition]
• Measurement unit: ROHDE & SCHWARZ, UPD05
• MCKI: 256fs, 512fs
• BICK: 64fs
• Bit: 16bit
• Sampling Frequency: 8kHz & 16kHz
• Measurement Frequency: 20 ∼ 3.4kHz (fs=8kHz), 20 ∼ 8kHz (fs=16kHz)
• Power Supply: AVDD=DVDD=3.3V,SVDD=3.3V/5.0V
• Temperature: Room
• Input Frequency: 1kHz
[Measurement Results]
1.ADC characteristics (MIC Gain = +20dB, IPGA=0dB, ALC1 = OFF, MIC Æ IPGA Æ ADC)
Result
MCKI clock
512fs
256fs
Sampling Frequency
8kHz
16kHz
8kHz
S/(N+D) (-1dBFS)
84.6dB
84.1dB
85.2dB
D-Range (-60dBFS)
86.1dB
85.0dB
88.6dB
S/N
86.1dB
85.0dB
88.6dB


2. DAC characteristics (AOUT) (DAC Æ AOUT, DVOL = 0dB)
Result
MCKI clock
Sampling Frequency
512fs
8kHz
16kHz
256fs
8kHz
S/(N+D) (0dBFS)
89.7dB
89.0dB
86.0dB
D-Range (-60dBFS)
S/N
93.5dB
94.1dB
91.1dB
92.2dB
93.7dB
94.5dB


3. Speaker-Amp characteristics (DAC ˠ MOUT ˠ MIN Æ SPP/SPN, ALC2=OFF)
Result
S/(N+D)
SVDD=3.3V SPKG1-0 = “00” (-0.5dBFS)
RL=8Њ
SPKG1-0 = “01” (-0.5dBFS)
65.8dB
67.8dB
SVDD=5.0V SPKG1-0 = “10” (-0.5dBFS) 74.5dB
RL=50Њ
SPKG1-0 = “11” (-0.5dBFS) 78.1dB
S/N
SVDD=3.3V SPKG1-0 = “00”
90.2dB
RL=8Њ
SPKG1-0 = “01”
90.4dB
SVDD=5.0V SPKG1-0 = “10”
RL=50Њ
SPKG1-0 = “11”
90.3dB
90.4dB


4. Loop-back (MIC Æ ADC Æ DAC Æ AOUT)
16kHz
84.1dB
84.9dB
85.0dB
16kHz
91.9dB
95.3dB
95.3dB
MCKI clock
Sampling Frequency
S/(N+D) (-1dBFS)
D-Range (-60dBFS)
S/N
512fs
8kHz
16kHz
84.4dB
84.0dB
85.9dB
84.8dB
86.0dB
84.8dB
Result
256fs
8kHz
84.7dB
87.8dB
87.9dB
16kHz
84.0dB
84.5dB
84.6dB
<KM077301>
- 20 -
2005/01