56F8165(2007) データシートの表示（PDF） - Freescale Semiconductor

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56F8165
(Rev.:2007)

16-bit Digital Signal Controllers

Freescale Semiconductor 

Analog-to-Digital Converter (ADC) Parameters

Table 10-23 ADC Parameters (Continued)

Characteristic

Symbol

Min

Typ

Max

Unit

Monotonicity

GUARANTEED

ADC internal clock

fADIC

0.5

—

5

MHz

Conversion range

RAD

VREFL

—

VREFH

V

ADC channel power-up time

tADPU

5

6

16

tAIC cycles3

ADC reference circuit power-up time4

tVREF

—

—

25

ms

Conversion time

tADC

—

6

—

tAIC cycles3

Sample time

tADS

—

1

—

tAIC cycles3

Input capacitance

CADI

—

5

—

pF

Input injection current5, per pin

IADI

—

—

3

mA

Input injection current, total

IADIT

—

—

20

mA

VREFH current

IVREFH

—

1.2

3

mA

ADC A current

IADCA

—

25

—

mA

ADC B current

Quiescent current

IADCB

—

25

—

mA

IADCQ

—

0

10

μA

Uncalibrated Gain Error (ideal = 1)

EGAIN

—

+/- .004

+/- .01

—

Uncalibrated Offset Voltage

VOFFSET

—

+/- 27

+/- 40

mV

Calibrated Absolute Error6

AECAL

—

See Figure 10-22

—

LSBs

Calibration Factor 17

CF1

—

0.002289

—

—

Calibration Factor 27

CF2

—

-25.6

—

—

Crosstalk between channels

—

—

-60

—

dB

Common Mode Voltage

Vcommon

—

(VREFH - VREFLO) / 2

—

V

Signal-to-noise ratio

SNR

—

64.6

—

db

Signal-to-noise plus distortion ratio

SINAD

—

59.1

—

db

Total Harmonic Distortion

THD

—

60.6

—

db

Spurious Free Dynamic Range

SFDR

—

61.1

—

db

Effective Number Of Bits8

ENOB

—

9.6

—

Bits

1. INL measured from Vin = .1VREFH to Vin = .9VREFH

10% to 90% Input Signal Range

2. LSB = Least Significant Bit

3. ADC clock cycles

4. Assumes each voltage reference pin is bypassed with 0.1μF ceramic capacitors to ground

5. The current that can be injected or sourced from an unselected ADC signal input without impacting the performance of

the ADC. This allows the ADC to operate in noisy industrial environments where inductive flyback is possible.

56F8365 Technical Data, Rev. 7

Freescale Semiconductor

161

Preliminary

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