DSPIC33FJ64GP710 datasheet(3/10 Pages) MICROCHIP

3 / 10 page

DS80279B-page 3

dsPIC33F

Module: 12-bit ADC

When the ADC module is configured for 12-bit

operation, the specifications in the data sheets are

not met.

Work around

Implement the ADC module as an 11-bit ADC with

a maximum conversion rate of 300 Ksps.

1. The specifications provided below reflect 11-bit

ADC operation. RIN source impedance is rec-

ommended as 200 ohms and sample time is

recommended as 3 TAD to ensure compatibility

on future enhanced ADC modules. Missing

codes are possible every 27 codes.

2. When used as a 10-bit ADC, the INL is <±2

LSBs, and DNL is <±1 LSB with no missing

codes. Maximum conversion rate is 300 Ksps.

TABLE 1:

ADC PERFORMANCE (11-BIT OPERATION)

Param No.

Symbol

Min

Typical

Max

Units

Conditions

AD17

RIN

—

200

Ohm

12-bit

ADC Accuracy – Measurements taken with External VREF+/VREF-

AD20a

—

12 bits

—

Bits

AD21a

INL

-2

—

LSB

AD22a

DNL

-1.5

—

LSB

AD23a

GERR

LSB

AD24a

EOFF

LSB

ADC Accuracy – Measurements taken with Internal VREF+/VREF-

AD21aa

INL

-2

—

LSB

AD22aa

DNL

-1.5

—

LSB

AD23aa

GERR

LSB

AD24aa

EOFF

LSB

Dynamic Performance

AD33a

FNYQ

—

150

KHz

AD34a

ENOB

9.5

9.6

10.4

Bits

ADC Conversion Rate

AD56a

FCNV

—

300

Ksps

AD57a

TSAMP

—

3 TAD

——

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