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AN1812 Datasheet(PDF) 9 Page - STMicroelectronics

Part # AN1812
Description  In general the ADC embedded in the ST7 microcontroller
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1812 Datasheet(HTML) 9 Page - STMicroelectronics

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AN1812
6 Characteristics of different slope converters
9/34
6
Characteristics of different slope converters
6.1
Single-slope converter
Figure 5.
Single-Slope Converter Circuit Diagram
6.1.1
Timing diagram
Here Vin is directly proportional to the time measured.
Figure 6.
Single-slope converter timing diagram
The major sources of conversion errors are the correction factor for the R*C product and the
input offset voltage.
A single-slope converter requires a dual supply voltage op-amp to be able to measure the
positive and negative voltages.
R
-Vref
VINT
Vin
C
Vin
Time
Here Vin = K * Tm



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