ADUC832 Analog Devices, ADUC832 Datasheet - Page 43

• Manufacturer Part Number: ADUC832
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 62kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC832

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 8
• Other: PWM

CALIBRATING THE ADC
There are two hardware calibration modes provided that can be
easily initiated by user software. The ADCCON3 SFR is used to
calibrate the ADC. The typical bit (ADCCON3[1]) and the CS3
to CS0 bits (ADCCON2[3:0]) set up the calibration modes.
Device calibration can be initiated to compensate for significant
changes in operating conditions frequency, analog input range,
reference voltage, and supply voltages. In this calibration mode,
offset calibration uses the internal AGND selected via ADCCON2
register bits CS[3:0] = 1011, and gain calibration uses the internal
V
executed first, followed by gain calibration.
REF
selected by CS[3:0] = 1100. Offset calibration should be
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System calibration can be initiated to compensate for both internal
and external system errors. To perform system calibration using
an external reference, tie system ground and reference to any
two of the six selectable inputs. Enable external reference mode
(ADCCON1[6]). Select the channel connected to AGND via
CS[3:0] and perform system offset calibration. Select the channel
connected to V
The ADC should be configured to use settings for an ADCCLK
of divide-by-16 and divide-by-4 acquisition clocks.
REF
via CS[3:0] and perform system gain calibration.
ADuC832