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ADE3800SXT Datasheet(PDF) 23 Page - STMicroelectronics

Part # ADE3800SXT
Description  Analog LCD Display Engine for XGA and SXGA Resolutions with Embedded LVDS and RSDS Transmitters
PDF  138 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ADE3800SXT Datasheet(HTML) 23 Page - STMicroelectronics

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ADE3800
Register Description by Block
The ADC clamp signal is generated in digital circuitry.
4.3.2.2 SOG Lock State
Set:
● ANA_ADC_SOG_1[0] remains 0,
● ANA_ADC_GRN_2[1] = 0 (ADC clamp on; must be the same as ANA_ADC_SOG_1[3]).
● ANA_ADC_SOG_1[3] = 0 (disable SOG clamp pull down current),
This enables the ADC Clamp circuit and disables the SOG Clamp (this is the recommended order –
it is better to have overlap than no clamp at all). The comparators will continue to compare the input
signal with the reference voltages and provide a correct SOG signal. Comparator threshold voltages
can be adjusted to optimize noise immunity if necessary.
Figure 4: Initial SOG Clamp Phase
ADCSOG1[0] = 0 (pwdnSOG)
ADCSOG1[3] (enSOG) = ADCGRN2[1] = 1



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