參數(shù)資料
型號(hào)： AK4620A
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 24 BIT 192KHZ AUDIO CODEC WITH IPGA
中文描述： 24位192kHz的音頻編解碼器單親遺傳算法
文件頁(yè)數(shù)： 37/42頁(yè)
文件大?。?/td> 395K
代理商： AK4620A
ASAHI KASEI
[AK4620A]
MS0368-E-00
2004/12
- 37 -
4. Analog Inputs
4-1. Single-ended Input (ADMODE pin = “L”)
The IPGA inputs are single-ended. The input resistance of IPGA is typically 5.1k
at IPGA=0dB and typically
1.18k
at IPGA=+18dB. The input signal is typically AC coupled through a capacitor. The cut-off frequency is fc =
(1/2
π
RC). The input signal range scales with the VREF voltage and is nominally 3.07Vpp (VREF=5V) centered
around the internal common voltage (about VA/2). In single-ended mode, the AK4620A includes an anti-aliasing
filter (RC filter) to attenuate noise around 128fs.
4-2. Full-Differential Input (ADMODE pin = “H”)
The AK4620A can accept input voltages from AGND to VA.
The input signal range scales with the VREF voltage
and is nominally 2.82Vpp (VREF = 5V), centered around the internal common voltage (about VA/2). Figure 17 shows
an input buffer circuit example. This is a fully differential input buffer circuit with an inverted amplifier (gain:
10dB). The capacitor of 10nF between AINL+/
(AINR+/
) decreases the clock feedthrough noise of the modulator,
and composes a 1st order LPF (fc=360kHz) with a 22
resistor before the capacitor. This circuit also has a 1st order
LPF (fc=370kHz) composed of op-amp. The evaluation board should be referred about the detail.
AIN+
AIN-
AK4620A
Analog In
4.7k
4.7k
VP+
VP-
NJM5532
47
μ
3k
470p
910
22
47
μ
3k
470p
910
22
Bias
10n
9.3Vpp
2.82Vpp
2.82Vpp
Bias
10
μ
0.1
μ
Bias
10k
10k
VA
VA = 5V
VP+ = 15V
VP- = -15V
Figure 17. Input Buffer example in differential mode
相關(guān)PDF資料
PDF描述
AK4620AVF 24 BIT 192KHZ AUDIO CODEC WITH IPGA
AK4620B 24-Bit 192kHz Audio CODEC with IPGA
AK4620BVF 24-Bit 192kHz Audio CODEC with IPGA
AK4626A High Performance Multi-channel Audio CODEC
AK4626AVQ High Performance Multi-channel Audio CODEC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4620AVF 制造商:AKM 制造商全稱:AKM 功能描述:24 BIT 192KHZ AUDIO CODEC WITH IPGA
AK4620AVFP-E2 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:
AK4620B 制造商:AKM 制造商全稱:AKM 功能描述:24-Bit 192kHz Audio CODEC with IPGA
AK4620BVF 制造商:AKM 制造商全稱:AKM 功能描述:24-Bit 192kHz Audio CODEC with IPGA
AK4620BVFPE2 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:
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