56F8167 datasheet(161/184 Pages) FREESCALE

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Analog-to-Digital Converter (ADC) Parameters

56F8367 Technical Data, Rev. 7.0

Freescale Semiconductor

161

Preliminary

10.16 Analog-to-Digital Converter (ADC) Parameters

Table 10-24 ADC Parameters

Characteristic

Symbol

Min

Typ

Max

Unit

Input voltages

VADIN

VREFL

—VREFH

Resolution

RES

—

Bits

Integral Non-Linearity1

INL

—

+/- 2.4

+/- 3.2

LSB2

Differential Non-Linearity

DNL

—

+/- 0.7

< +1

LSB2

Monotonicity

GUARANTEED

ADC internal clock

fADIC

0.5

—

MHz

Conversion range

RAD

VREFL

—VREFH

ADC channel power-up time

tADPU

tAIC cycles

ADC reference circuit power-up time4

tVREF

——

Conversion time

tADC

—6

—

tAIC cycles

Sample time

tADS

—1

—

tAIC cycles

Input capacitance

CADI

—5

—

Input injection current5, per pin

IADI

——

Input injection current, total

IADIT

——

VREFH current

IVREFH

—1.2

ADC A current

IADCA

—25

—

ADC B current

IADCB

—25

—

Quiescent current

IADCQ

—0

µA

Uncalibrated Gain Error (ideal = 1)

EGAIN

—

.+/- .004

+/- .01

—

Uncalibrated Offset Voltage

VOFFSET

—

+/- 27

+/- 40

Calibrated Absolute Error6

AECAL

—

See Figure 10-22

—LSBs

Calibration Factor 17

CF1

—

0.002289

—

Calibration Factor 2

CF2

—

-25.6

—

Crosstalk between channels

—

-60

—

Common Mode Voltage

Vcommon

—(VREFH - VREFLO) / 2

—

Signal-to-noise ratio

SNR

—

64.6

—

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