參數(shù)資料
型號: AK4665AEN
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 20-Bit Stereo CODEC with MIC/HP-AMP
中文描述: 20位立體聲編解碼器麥克風/惠普腺苷
文件頁數(shù): 27/52頁
文件大?。?/td> 541K
代理商: AK4665AEN
ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 27 -
External Analog Input (LIN, RIN, MIN pins)
The input signals from LIN/RIN/MIN pins can be output from headphone and lineout. LIN/RIN/MIN input buffers are 2
nd
order LPF (fc=50kHz(typ)) in order to attenuate the high frequency noise of external analog input signals. DC component
of input signal should be cut by external capacitor. The cut-off frequency (fc) of HPF depends on the internal input
resistance (Ri) and the external capacitor value (C): fc=1/(2
π
RiC). The input resistance is 200k
±
50%, The gain is
0dB(typ) for both Lineout and HP-Amp (HPG=LING bits = “0”).
When HPG bit = “1” and LING bit = “0”, the gain of HP-Amp is
5.5dB(typ).
When HPG bit = “0” and LING bit = “1”, the gain of LIN/RIN
HPL/HPR paths are
12dB(typ).
LIN/RIN/MIN input buffers powered-up when either bits of PMHPL, PMHPR and PMLO bits become “1”.
AK4665A
Lineout
LIN/RIN/MIN pin
Ri
+
HP-Amp
C
Figure 17. External Analog input circuit
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