PIC16LC715-20I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC715-20I/SO

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

7.9 Transfer Function

The ideal transfer function of the A/D converter is as fol-

lows: the first transition occurs when the analog input

voltage (VAIN) is Analog VREF/256 (Figure 7-6).

7.10 References

A very good reference for understanding A/D convert-

ers is the "Analog-Digital Conversion Handbook" third

edition, published by Prentice Hall (ISBN 0-13-03-

2848-0).

PIC16C71X

FIGURE 7-6: A/D TRANSFER FUNCTION

FFh

FEh

04h

03h

02h

01h

00h

Analog input voltage

FIGURE 7-7: FLOWCHART OF A/D OPERATION

ADON = 0

Yes

ADON = 0?

No

Acquire

Selected Channel

Yes

GO = 0?

No

Yes

A/D Clock

= RC?

No

Start of A/D

Conversion Delayed

1 Instruction Cycle

Yes

Device in

SLEEP?

No

Finish Conversion

GO = 0

ADIF = 1

Abort Conversion

GO = 0

ADIF = 0

SLEEP

Power-down A/D

SLEEP Yes

Instruction?

No

Finish Conversion

GO = 0

ADIF = 1

Wait 2 TAD

Finish Conversion

GO = 0

ADIF = 1

Wake-up Yes

From Sleep?

No

Stay in Sleep

Power-down A/D

Wait 2 TAD

Wait 2 TAD

© 1997 Microchip Technology Inc.

DS30272A-page 45

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