PIC16F886-I/ML【PDF 5/16 页】IC PIC MCU FLASH 8KX14 28QFN

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Sheet目录3873

1页 2页 3页 4页 [5页]6页 7页 8页 9页

2009 Microchip Technology Inc.

DS80302F-page 13

PIC16F88X

Data Sheet Clarifications

The

following

typographical

corrections

and

clarifications are to be noted for the latest version of the

device data sheet (DS41291F):

Module: ADC (Block Diagram)

Figure

9-1:

ADC

Block

Diagram

changes

references from AVSS to VSS and AVDD to VDD.

Module: ADC

Acquisition Time Example calculation correction.

EQUATION 9-1:

ACQUISITION TIME EXAMPLE

Note:

Corrections are shown in bold. Where

possible, the original bold text formatting

has been removed for clarity.

TACQ

Amplifier Settling Time

Hold Capacitor Charging Time

Temperature Coefficient

TAMP

TCOFF

Temperature - 25°C

() 0.05s/°C

()

[]

CHOLD RIC

RSS

() ln(1/2047)

–

10pF 1k

Ω 7kΩ 10kΩ

()

–

ln(0.0004885)

1.37

TACQ

1.37s

50°C- 25°C

() 0.05s/°C

()

[]

4.67s

VAPPLIED 1e

–

---------

–

VAPPLIED 1

() 1

–

--------------------------

–

VAPPLIED 1

() 1

–

--------------------------

–

VCHOLD

VAPPLIED 1e

–

----------

–

VCHOLD

;[1] VCHOLD charged to within 1/2 lsb

;[2] VCHOLD charge response to VAPPLIED

;combining [1] and [2]

The value for TC can be approximated with the following equations:

Solving for TC:

Therefore:

Temperature

50°C and external impedance of 10k

Ω 5.0V VDD

Assumptions:

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