INTEDG datasheet(410/478 Pages) MICROCHIP

410 / 478 page

PIC16(L)F1946/47

DS41414D-page 410

 2010-2012 Microchip Technology Inc.

TABLE 30-8:

PIC16(L)F1946/47 A/D CONVERTER (ADC) CHARACTERISTICS(1,2,3):

TABLE 30-9:

PIC16(L)F1946/47 A/D CONVERSION REQUIREMENTS

Standard Operating Conditions (unless otherwise stated)

Operating temperature

25°C

Param

No.

Sym.

Characteristic

Min.

Typ†

Max. Units

Conditions

AD01

Resolution

—

bit

AD02

EIL

Integral Error

—

±1.7

LSb VREF = 3.0V

AD03

EDL

Differential Error

—

±1

LSb No missing codes

VREF = 3.0V

AD04

EOFF Offset Error

—

±2.5

LSb VREF = 3.0V

AD05

EGN

Gain Error

—

±2.0

LSb VREF = 3.0V

AD06

VREF Reference Voltage(4)

1.8

—

VDD

VVREF = (VREF+ minus VREF-)

AD07

VAIN

Full-Scale Range

VSS

—VREF

AD08

ZAIN

Recommended Impedance of

Analog Voltage Source

——

 Can go higher if external 0.01

F capacitor is

present on input pin.

†

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: 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.

4: ADC Reference Voltage (Ref+) is the selected reference input, VREF+ pin, VDD pin or the FVR Buffer1. When the FVR is

selected as the reference input, the FVR Buffer1 output selection must be 2.048V or 4.096V, (ADFVR<1:0> = 1x).

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

2.5

6.0

s

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

AD131

TCNV

Conversion Time (not including

Acquisition Time)(1)

—11

—

TAD

Set GO/DONE bit to conversion

complete

AD132* TACQ

Acquisition Time

—

5.0

—

s

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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