SH79F6488PSLASH080PR datasheet(103/152 Pages) SINOWEALTH

103 / 152 page

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-

SH79F6488P/080PR Datasheet(PDF) 103 Page - SINOWEALTH Electronic Ltd