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參數(shù)資料
| 型號： | AK2301A |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 3.3V Single channel PCM CODEC LSI |
| 中文描述： | 3.3單聲道的PCM CODEC芯片 |
| 文件頁數(shù)： | 12/20頁 |
| 文件大小： | 158K |
| 代理商： | AK2301A |
ASAHI KASEI
AK2301A
CIRCUIT DESCRIPTION
BLOCK
AMPT
Op-amp for input gain adjustment. This op-amp is used as an inverting or
differential amplifier. Adjusting the gain with external resistors. The resistor
should be larger than 10k
for the feedback resistor.
VFTN: Negative op-amp input.
VFTP: Positive op-amp input.
GST: Op-amp output.
AMPR
Op-amp for output gain adjustment. This op-amp is used as an inverting
amplifier. Adjusting the gain with external resistors. The combined resistor larger
than 8k
is recommended for the feedback and the output load
VFR: Negative op-amp input.
GSR: Op-amp output.
VR and GSR can be used as the differential output.
AAF
Integrated anti-aliasing filter which prevents signals around the sampling rate
from folding back into the voice band. AAF is a 2
nd
order RC active low-pass filter.
CODEC
A/D
CODEC
D/A
element.
SMF
Extracts the inband signal from D/A output. It also corrects the sinx/x effect of the
D/A output.
BGREF
Provide the stable analog ground voltage using an on-chip band-gap reference
circuit which is temperature compensated. The output voltage is 1.5V for 3.3V
An external capacitor of 1.0uF or larger should be connected between VREF and
VSS to stabilize analog ground (VREF).
Please do not connect external load to
this pin.
TAGND pin is used as the analog ground level output for the AMPT. An
external capacitor of 1.0uF or larger should be connected between TAGND and
VSS to stabilize analog ground.
PCM I/F
For the PCM data rate, both 256kHz or 512kHz are available.
The 14bit PCM data is input/output by the 2’s compliment 16bit serial data
format. Two kinds of serial data format (Long Frame/Short Frame) are available.
Each data format is automatically detected by AK2301A.
PCM data is input to DR pin and output from DX pin.
AMP1
、
AMP2
Universal op-amp for the filter of the external voice path.
The maximum load is 8k
(including the feedback resistor and AC load).
These op-amps are assumed as using for the inverting LPF with 20kHz cut off
frequency.
<MS0300-E-00>
12
2004/3
FUNCTION
Converting the analog signal to 14bit PCM data.
The band limiting filter is also integrated.
Converting the 14bit PCM data from the DR to the analog signal.
Output of the D/A converter is fed into the SMF to suppress the high frequency
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| AK2301BX | 制造商:AKM 制造商全稱:AKM 功能描述:3.3V Linear PCM CODEC LSI with PLL & Voltage Detector |
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| AK230-2 | 功能描述:CABLE SERIAL INTER DB9M-DB9F 2M RoHS:否 類別:電纜組件 >> D-Sub 系列:- 標準包裝:1 系列:- 第一連接器:公形引腳插頭 第二連接器:公形引腳插頭 類型:高密度（HD） 位置數(shù):68 長度:12.0'（3.66m） 屏蔽:屏蔽 顏色:米灰，雙絞線（圓形） 使用:SCSI III 觸點表面涂層:- 觸點涂層厚度:- |
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