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參數(shù)資料
| 型號： | AKD4527B |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | EVALUATION BOARD REV.D FOR AK4527B |
| 中文描述： | 評價委員會REV.D的AK4527B |
| 文件頁數(shù)： | 3/40頁 |
| 文件大?。?/td> | 348K |
| 代理商： | AKD4527B |
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ASAHI KASEI
[AKD4527B Rev.D]
<KM063700>
- 3 -
’00/9
3) Frequency response of LPF
1st-order RC LPF is implemented on board to attenuate the noise around the internal sampling frequency of
ADC (64fs=3.072MHz@fs=48kHz)
Frequency response of 1st-order LPF
| Amplitude |
2
= 1/{1+(f/fc)
2
}; fc=1/2
π
RC=
169.3kHz
@R=470,C=2000p
(1nF capacitance prior to ADC is doubled because of full-differential input.)
fin
20kHz
40kHz
Frequency Response
-0.060dB
-0.236dB
n
Consideration for analog output circuit
AK4527
ROUT1
22u
Signal
6.0Vpp
28
27
26
25
Same circuit
3.0Vpp
NJM5532
+
-
LOUT1
ROUT2
LOUT2
ROUT3
LOUT3
24
23
Same circuit
Same circuit
Same circuit
Same circuit
10k
4.7k
4.7k
330p
220
1) Frequency response of HPF
The HPF is implemented on board to cancel the DC offset of analog output of AK4527B.
Frequency response of 1st-order HPF
| Amplitude |
2
= 1/{1+(fc/f)
2
}; fc=1/2
π
RC=
0.7Hz
@R=10k,C=22u
fin
20Hz
Frequency Response
-0.006dB
2) Gain, S/N and frequency response of op-amp circuit
1st-order filter with non-inverting amp is implemented on board to double the analog output level and attenuate
out-of-band noise.
a) Gain
The gain is
1+4.7k/4.7k = +6.00dB.
Therefore the output level of this board is
0.51dBV(=3.0Vpp) + 6.00dB
= 6.51dBV = 6.0Vpp = 2.12Vrms.
b) S/N (Theory: BW=20k+A)
The output noise level of non-inverting amp
-110.36dBV = -116.87dB (0dB=6.51dBV)
S/N of DAC is
106.0dB (measurement)
Therefore total S/N of op-amp circuit and DAC is
105.66dB
(measurement: 105.5dB).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AKD4527B(AKD4527B) | Evaluation board Rev.D for AK4527B |
| AKD4527B.(AKD4527B) | Evaluation board Rev.D for AK4527B |
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| AKD4550 | EVALUATION BOARD REV.C FOR AK4550 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AKD4527B(AKD4527B) | 制造商:AKM 制造商全稱:AKM 功能描述:Evaluation board Rev.D for AK4527B |
| AKD4527B.(AKD4527B) | 制造商:AKM 制造商全稱:AKM 功能描述:Evaluation board Rev.D for AK4527B |
| AKD4528 | 制造商:AKM 制造商全稱:AKM 功能描述:High Performance 24Bit 96kHz Audio CODEC |
| AKD4528_05 | 制造商:AKM 制造商全稱:AKM 功能描述:24Bit A/D & D/A converter |
| AKD4529 | 制造商:AKM 制造商全稱:AKM 功能描述:High Performance Multi-channel Audio CODEC |
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