PIC16LC717T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC717T-I/SO

18/20-Pin, 8-Bit CMOS Microcontrollers with 10/12-Bit A/D

Microchip Technology 

PIC16C717/770/771

FIGURE 15-15: PIC16C717 A/D CONVERSION TIMING (NORMAL MODE)

BSF ADCON0, GO

134

Q4

A/D CLK

131

130

1/2 TCY

A/D DATA

9

8

7

6

3

2

1

0

ADRES

OLD_DATA

NEW_DATA

ADIF

GO

SAMPLE

132

SAMPLING STOPPED

DONE

Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the

SLEEP instruction to be executed.

TABLE 15-16: PIC16C717 AND PIC16LC717 A/D CONVERSION REQUIREMENTS

Parameter Sym

No.

130*

TAD

Characteristic

A/D clock period

130*

TAD

A/D Internal RC

oscillator period

131*

132*

TCNV

TACQ

Conversion time (not

including

acquisition time)

(Note 1)

Acquisition Time

Min

1.6

3.0

3.0

2.0

—

Note 2

Typ†

—

—

6.0

4.0

11TAD

11.5

Max Units

Conditions

—

µs Tosc based, VREF ≥ 2.5V

—

µs Tosc based, VREF full range

ADCS<1:0> = 11 (RC mode)

9.0

µs

At VDD = 2.5V

6.0

µs

At VDD = 5.0V

—

TAD Set GO bit to new data in A/D result

register

—

µs

5*

—

—

µs The minimum time is the amplifier

settling time. This may be used if

the “new” input voltage has not

changed by more than 1LSb (i.e

1mV @ 4.096V) from the last sam-

pled voltage (as stated on CHOLD).

134*

TGO Q4 to A/D clock start

—

TOSC/2

—

— If the A/D clock source is selected

as RC, a time of TCY is added

before the A/D clock starts. This

allows the SLEEP instruction to be

executed.

* These parameters are characterized but not tested.

† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not

tested.

Note 1: ADRES register may be read on the following TCY cycle.

2: See Section 11.6 for minimum conditions.

© 1999 Microchip Technology Inc.

Advanced Information

DS41120A-page 175

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