參數(shù)資料
型號: TL7231MD
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: FULL LAYER-III ISO/IEC 11172-3 AUDIO DECODER
中文描述: 完整的Layer -Ⅲ的ISO / IEC 11172-3音頻譯碼器
文件頁數(shù): 28/37頁
文件大?。?/td> 468K
代理商: TL7231MD
TL7231MD
28/37
SAMSUNG Electronics Co.
ADC
The internal ADC of TL7231MD is 12-bit resolution ADC. It is recycling type ADC with sample-
and-hold function. The analog input ADCAIN should be single-ended type with the range from
ADCREFP to ADCREFN. This ADCAIN voltage follows reference voltage range fundamentally.
So, if user wants to alter the input range, the voltage value of ADCREFP should be changed.
But ADCREFP should be greater than 2.0V. The characteristic of internal ADC is shown Table 8.
Table 8
. Characteristics of Internal ADC
PARAMETER
MIN
TYP
74.3
64.9
64.4
MAX
UNITS
dB
dB
dB
THD
SNR
SNDR
(ADCVDDD/ADCVDDA=3.0V, ADCAIN=8KHz)
Figure 19.
Reference Circuit when using internal ADC
With TL7231MD, the following circuit in Figure 19 is recommended to use internal ADC.
ADCVDDA
ADCVSSA
ADCVBB
ADCVDDD
ADCVSSD
ADCAIN
ADCREFP
ADCREFN
3.0V
Vref
10u
0.1u
10u
0.1u
3.0V
ADCREFP/2
10u
0.1u
TL7231MD
ADCREFN
ADCREFP
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