AKD4632 Datasheet, PDF (25/48 Pages) Asahi Kasei Microsystems – AK4632 Evaluation board Rev.0

ASAHI KASEI
[AKD4632-A]
MEASUREMENT RESULTS EXAMPLE
1.AK4632 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=VVDD=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
Sampling Frequency
512fs
8kHz
16kHz
256fs
8kHz
16kHz
S/(N+D) (-1dBFS)
D-Range (-60dBFS)
S/N
84.3dB
88.1dB
88.1dB
84.1dB
86.4dB
86.3dB
84.4dB
85.2dB
88.2dB
84.0dB
86.3dB
86.3dB
2. DAC characteristics (AOUT) (DAC Æ AOUT, DVOL = 0dB)
Result
MCKI clock
Sampling Frequency
512fs
8kHz
16kHz
8kHz
S/(N+D) (0dBFS)
91.5dB
89.6dB
90.8dB
D-Range (-60dBFS)
S/N
94.8dB
95.5dB
92.0dB
93.5dB
94.5dB
95.0dB
256fs
16kHz
89.5dB
92.1dB
93.5dB
3. Speaker-Amp characteristics (DAC Æ MOUT Æ MIN Æ SPP/SPN, ALC2=OFF)
S/(N+D)
S/N
SVDD=3.3V
RL=8Ω
SVDD=5.0V
RL=10Ω, CL=3uF
SVDD=3.3V
RL=8Ω
SVDD=5.0V
RL=10Ω, CL=3uF
SPKG1-0 = “00” (-0.5dBFS)
SPKG1-0 = “01” (-0.5dBFS)
SPKG1-0 = “10” (-0.5dBFS)
SPKG1-0 = “11” (-0.5dBFS)
SPKG1-0 = “00”
SPKG1-0 = “01”
SPKG1-0 = “10”
SPKG1-0 = “11”
Result
69.6dB
73.5dB
73.2dB
73.8dB
90.4dB
91.7dB
90.6dB
91.0dB
4. Loop-back (MIC Æ ADC Æ DAC Æ AOUT)
MCKI clock
Sampling Frequency
S/(N+D) (-1dBFS)
D-Range (-60dBFS)
S/N
8kHz
84.2dB
88.4dB
88.4dB
512fs
16kHz
83.2dB
85.9dB
86.0dB
Result
8kHz
84.2dB
87.0dB
87.0dB
256fs
16kHz
83.4dB
85.9dB
86.0dB
<KM075602>
- 25 -
2005/04