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Sheet目录3832

115页 116页 117页 118页 [119页]120页 121页 122页 123页

PIC16(L)F1782/3

DS41579C-page 386

Preliminary

2011-2012 Microchip Technology Inc.

TABLE 30-8:

PIC16(L)F1782/3 A/D CONVERTER (ADC) 12-BIT DIFFERENTIAL CHARACTERISTICS:

TABLE 30-9:

PIC16(L)F1782/3 A/D CONVERSION REQUIREMENTS

Operating Conditions

VDD = 3V, Temp. = 25°C, Single-ended 2

s TAD, VREF+ = 3V, VREF- = VSS

Param

No.

Sym.

Characteristic

Min.

Typ

Max. Units

Conditions

AD01

Resolution

—

bit

AD02

EIL

Integral Error

—

±1

±1.6

LSb

AD03

EDL

Differential Error

—

±1

±1.4

LSb No missing codes

AD04

EOFF Offset Error

—

±1

±2

LSb

AD05

EGN

Gain Error

—

±1

±2

LSb

AD06

VREF Reference Voltage(3)

1.8

—

VDD

VVREF = (VREF+ minus VREF-) (Note 5)

AD07

VAIN

Full-Scale Range

—

VREF

AD08

ZAIN

Recommended Impedance of

Analog Voltage Source

——

Can go higher if external 0.01F capacitor is

present on input pin.

AD09

Resolution

—

bit

AD10

EIL

Integral Error

—

±2

—

LSb

AD11

EDL

Differential Error

—

±2

—

LSb

AD12

EOFF Offset Error

—

±1

—

LSb

AD13

EGN

Gain Error

—

±1

—

LSb

AD14

VREF Reference Voltage(3)

1.8

—

VDD

VVREF = (VREF+ minus VREF-) (Note 5)

AD15

VAIN

Full-Scale Range

—

VREF

AD16

ZAIN

Recommended Impedance of

Analog Voltage Source

——

Can go higher if external 0.01F capacitor is

present on input pin.

These parameters are characterized but not tested.

Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not

tested.

Note 1: Total Absolute Error includes integral, differential, offset and gain errors.

2: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.

3: ADC VREF is from external VREF, VDD pin or FVR, whichever is selected as reference input.

4: When ADC is off, it will not consume any current other than leakage current. The power-down current specification

includes any such leakage from the ADC module.

5: FVR voltage selected must be 2.048V or 4.096V.

Standard Operating Conditions (unless otherwise stated)

Operating temperature

-40°C

TA +125°C

Param

No.

Sym.

Characteristic

Min.

Typ

Max.

Units

Conditions

AD130* TAD

A/D Clock Period

1.0

—

9.0

sTOSC-based

A/D Internal RC Oscillator

Period

1.0

1.6

6.0

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

AD131

TCNV

Conversion Time (not including

Acquisition Time)(1)

—15—

TAD

Set GO/DONE bit to conversion

complete

AD132* TACQ

Acquisition Time

—

5.0

—

These parameters are characterized but not tested.

Data in “Typ” column is at 3.0V, 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.

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