Freescale Semiconductor 56F8322 ユーザーズマニュアル

Freescale Semiconductor

56F8322 Techncial Data, Rev. 10.0

122

Freescale Semiconductor

Preliminary

10.15 Analog-to-Digital Converter (ADC) Parameters

Table 10-24 ADC Parameters

Characteristic

Symbol

Min

Typ

Max

Unit

Input voltages

V

ADIN

V

REFL

—

V

REFH

V

Resolution

R

ES

12

—

12

Bits

Integral Non-Linearity

1

INL

—

+/- 2.4

+/- 3.2

LSB

2

Differential Non-Linearity

DNL

—

+/- 0.7

< +1

LSB

2

Monotonicity

GUARANTEED

ADC internal clock

f

ADIC

0.5

—

5

MHz

Conversion range

R

AD

V

REFL

—

V

REFH

V

ADC channel power-up time

t

ADPU

5

6

16

t

AIC

cycles

3

ADC reference circuit power-up time

4

t

VREF

—

—

25

ms

Conversion time

t

ADC

—

6

—

t

AIC

cycles

3

Sample time

t

ADS

—

1

—

t

AIC

cycles

3

Input capacitance

C

ADI

—

5

—

pF

Input injection current

5

, per pin

I

ADI

—

—

3

mA

Input injection current, total

I

ADIT

—

—

20

mA

V

REFH

current

I

VREFH

—

1.2

3

mA

ADC A current

I

ADCA

—

25

—

mA

ADC B current

I

ADCB

—

25

—

mA

Quiescent current

I

ADCQ

—

0

10

µ

A

Uncalibrated Gain Error (ideal)

E

GAIN

—

+/- .004

+/- .01

—

Uncalibrated Offset Voltage

V

OFFSET

—

+/- 26

+/- 32

mV

Calibrated Absolute Error

6

AE

CAL

—

Figure 10-20

—

LSBs

Calibration Factor 1

7

CF1

—

0.008597

—

—

Calibration Factor 2

7

CF2

—

-2.8

—

—

Crosstalk between channels

—

—

-60

—

dB

Common Mode Voltage

V

common

—

(V

REFH

- V

REFLO

) / 2

—

V

Signal-to-noise ratio

SNR

—

64.6

—

db