PIC16F753 datasheet(195/230 Pages) MICROCHIP

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DS40001709C-page 195

PIC16F753/HV753

TABLE 22-19: ADC CONVERSION REQUIREMENTS

FIGURE 22-10:

PIC16F753/HV753 A/D CONVERSION TIMING (ADC CLOCK FOSC-BASED)

Standard Operating Conditions (unless otherwise stated)

VDD = 3.0V, TA = 25°C

Param

No.

Sym.

Characteristic

Min.

Typ†

Max. Units

Conditions

AD130* TAD

ADC Internal FRC

Oscillator Period

3.0

6.0

9.0

sAt VDD = 2.5V

1.6

4.0

6.0

sAt VDD = 5.0V

ADC Clock Period

1.6

—

9.0

sFOSC-based, VREF 3.0V

3.0

—

9.0

sTOSC-based, VREF full range(2)

AD131

TCNV

Conversion Time

(not including

Acquisition Time)(1)

—11

—

TAD

Set GO/DONE bit to conversion

complete

AD132* TACQ

Acquisition Time

—

11.5

—

s

AD133* TAMP

Amplifier Settling Time

—

s

AD134

TGO

Q4 to A/D Clock Start

—

TOSC/2

—

THCD Holding Capacitor

Disconnect Time

—

1/2 TAD

1/2 TAD + 1 TCY

—

—FOSC-based

ADCS<2:0> = x11 (ADC FRC mode)

These parameters are characterized but not tested.

† Data in “Typ” column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Note 1:

The ADRES register may be read on the following TCY cycle. See Section 12.4 “A/D Acquisition

Requirements” for minimum conditions.

Full range for PIC16HV753 powered by the shunt regulator is the 5V regulated voltage.

AD131

AD130

BSF ADCON0, GO

A/D CLK

A/D Data

ADRES

ADIF

Sample

OLD_DATA

Sampling Stopped

DONE

NEW_DATA

1 TCY

AD134

(

TOSC/2)

1 TCY

AD132

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