ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 259

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

ST72561-Auto
18
18.1
18.2
18.3
18.3.1
10-bit A/D converter (ADC)
Introduction
The on-chip Analog to Digital Converter (ADC) peripheral is a 10-bit, successive
approximation converter with internal sample and hold circuitry. This peripheral has up to 16
multiplexed analog input channels (refer to device pin out description) that allow the
peripheral to convert the analog voltage levels from up to 16 different sources.
The result of the conversion is stored in a 10-bit data register. The A/D converter is
controlled through a control/status register.
Main features
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The block diagram is shown in
Functional description
Digital A/D conversion result
The conversion is monotonic, meaning that the result never decreases if the analog input
does not and never increases if the analog input does not.
If the input voltage (V
conversion result is FFh in the ADCDRH register and 03h in the ADCDRL register (without
overflow indication).
If the input voltage (V
conversion result in the ADCDRH and ADCDRL registers is 00 00h.
The A/D converter is linear and the digital result of the conversion is stored in the ADCDRH
and ADCDRL registers. The accuracy of the conversion is described in the electrical
characteristics section.
R
is too high, this will result in a loss of accuracy due to leakage and sampling not being
completed in the allotted time.
AIN
10-bit conversion
Up to 16 channels with multiplexed input
Linear successive approximation
Data register (DR) which contains the results
Conversion complete status flag
On/off bit (to reduce consumption)
is the maximum recommended impedance for an analog input signal. If the impedance
AIN
AIN
) is greater than V
) is lower than V
Doc ID 12370 Rev 8
Figure
117.
SSA
DDA
(low-level voltage reference) then the
(high-level voltage reference) then the
10-bit A/D converter (ADC)
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