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SH79F6489P/080PR Fiches technique(PDF) 103 Page - SINOWEALTH Electronic Ltd

No de pièce SH79F6489P/080PR
Description  Enhanced 8051 Microcontroller with 20bit Σ-ΔADC and LCD Driver
PDF  152 Pages
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Fabricant  SINOWEALTH [SINOWEALTH Electronic Ltd]
Site Internet  https://en.sinowealth.com
Logo SINOWEALTH - SINOWEALTH Electronic Ltd

SH79F6489P/080PR Fiches technique(HTML) 103 Page - SINOWEALTH Electronic Ltd

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SH79F6488/SH79F6489
103
8.6 Analog Digital Converter (ADC)
8.6.1 Features
 20-bit data output
 16-bit resolution
 Internal or external reference voltage can be selected by user
 3 differential input/4 Single-ended inputs
 Multipath correction inputs
The SH79F6488/SH79F6489 include a full-differential 20-
bit Σ-Δ analog to digital converter. This ADC built-in 2 reference
voltage VREF1 and VREF2. User can also select external reference voltage. The analog input will be amplified by the PGA
(Programmable Gain Amplifier) before being input to ADC module. There are two kinds of analog input, differential input and
calibration input.
When set ADON bit in ADCON register, the conversion is always doing. When one conversion is complete, the data in ADC
data register will be updated and ADCIF bit in ADCON register will be set. If ADC interrupt is enabled, the ADC interrupt will
generate.
The ADC module can also work in IDLE mode and the ADC interrupt will wake up the IDLE mode. But the module is disabled in
Power-Down mode.
8.6.2 ADC Diagram
SCH [3:0]
PGA
+
-
CH+
CH-
GAIN [3:0]
ADC module
+
-
VREF
AIN1-
AIN1+
AIN0-
AIN0+
AIN2-
AIN2+
AN0~AN3
VIN+
VIN-



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