PIC16LC74AT-10/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC74AT-10/SP

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C7X

Applicable Devices 72 73 73A 74 74A 76 77

FIGURE 17-11: A/D CONVERSION TIMING

BSF ADCON0, GO

134

Q4

A/D CLK 132

A/D DATA

ADRES

ADIF

GO

SAMPLE

(TOSC/2) (1)

1 TCY

131

130

7

6

5

4

3

2

1

0

OLD_DATA

NEW_DATA

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 17-11: A/D CONVERSION REQUIREMENTS

Param Sym Characteristic

No.

130 TAD A/D clock period

PIC16C72

PIC16LC72

PIC16C72

PIC16LC72

131 TCNV Conversion time (not including S/H

time) (Note 1)

132 TACQ Acquisition time

Min

Typ†

1.6

—

2.0

—

2.0

4.0

3.0

6.0

—

9.5

Note 2 20

Max Units

Conditions

—

µs TOSC based, VREF ≥ 3.0V

—

µs TOSC based, VREF full range

6.0

µs A/D RC Mode

9.0

µs A/D RC Mode

—

TAD

—

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 1 LSb (i.e.,

20.0 mV @ 5.12V) from the last

sampled 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.

135 TSWC Switching from convert → sample time 1.5 §

—

—

TAD

*

†

§

Note 1:

2:

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.

This specification ensured by design.

ADRES register may be read on the following TCY cycle.

See Section 13.1 for min conditions.

DS30390E-page 182

© 1997 Microchip Technology Inc.

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