DSPIC30F5015 datasheet(139/234 Pages) MICROCHIP

139 / 234 page

DS70149E-page 139

dsPIC30F5015/5016

20.0

10-BIT HIGH-SPEED ANALOG-

TO-DIGITAL CONVERTER

(ADC) MODULE

The 10-bit high-speed Analog-to-Digital Converter

(ADC) allows conversion of an analog input signal to a

10-bit digital number. This module is based on a Suc-

cessive Approximation Register (SAR) architecture,

and provides a maximum sampling rate of 1 Msps. The

ADC module has 16 analog inputs which are multi-

plexed into four sample and hold amplifiers. The output

of the sample and hold is the input into the converter,

which generates the result. The analog reference volt-

ages are software selectable to either the device sup-

ply voltage (AVDD/AVSS) or the voltage level on the

(VREF+/VREF-) pin. The ADC has a unique feature of

being able to operate while the device is in Sleep

mode.

The ADC module has six 16-bit registers:

• A/D Control Register1 (ADCON1)

• A/D Control Register2 (ADCON2)

• A/D Control Register3 (ADCON3)

• A/D Input Select Register (ADCHS)

• A/D Port Configuration Register (ADPCFG)

• A/D Input Scan Selection Register (ADCSSL)

The ADCON1, ADCON2 and ADCON3 registers

control the operation of the ADC module. The ADCHS

ADPCFG register configures the port pins as analog

inputs or as digital I/O. The ADCSSL register selects

inputs for scanning.

The block diagram of the A/D module is shown in

Figure 20-1.

Note:

This data sheet summarizes features of

this group of dsPIC30F devices and is not

intended to be a complete reference

source. For more information on the CPU,

peripherals,

descriptions

and

general device functionality, refer to the

“dsPIC30F Family Reference Manual”

(DS70046). For more information on the

device instruction set and programming,

refer to the “16-bit MCU and DSC

Programmer’s

Reference

Manual”

(DS70157).

Note:

The

SSRC<2:0>,

ASAM,

SIMSAM,

SMPI<3:0>, BUFM and ALTS bits, as well

as the ADCON3 and ADCSSL registers,

must not be written to while ADON = 1.

This would lead to indeterminate results.

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