DSPIC30F4012 datasheet(218/238 Pages) MICROCHIP

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dsPIC30F4011/4012

DS70135G-page 218

TABLE 24-40: 10-BIT HIGH-SPEED A/D CONVERSION TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.5V to 5.5V

(unless otherwise stated)

Operating temperature

-40°C

≤TA ≤+85°C for Industrial

-40°C

≤TA ≤+125°C for Extended

Param

No.

Symbol

Characteristic

Min.

Typ

Max.

Units

Conditions

Clock Parameters

AD50

TAD

A/D Clock Period

—

See Table 20-2(1)

AD51

tRC

A/D Internal RC Oscillator Period

700

900

1100

Conversion Rate

AD55

tCONV

Conversion Time

—

12 TAD

——

AD56

FCNV

Throughput Rate

—

1.0

—

Msps

See Table 20-2(1)

AD57

TSAMP

Sample Time

—

1 TAD

—

See Table 20-2(1)

Timing Parameters

AD60

tPCS

Conversion Start from Sample

Trigger

—

1.0 TAD

——

AD61

tPSS

Sample Start from Setting

Sample (SAMP) Bit

0.5 TAD

—

1.5 TAD

—

AD62

tCSS

Conversion Completion to

Sample Start (ASAM = 1)

—

0.5 TAD

——

AD63

tDPU(2)

Time to Stabilize Analog Stage

from A/D Off to A/D On

——

μs

Note 1:

Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity

performance, especially at elevated temperatures.

tDPU is the time required for the ADC module to stabilize when it is turned on (ADCON1<ADON> = 1). Dur-

ing this time the ADC result is indeterminate.

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