56F8366 datasheet(166/184 Pages) FREESCALE

166 / 184 page

56F8366 Technical Data, Rev. 6

166

Freescale Semiconductor

Preliminary

ADC reference circuit power-up time4

tVREF

——

Conversion time

tADC

—6

—

tAIC cycles3

Sample time

tADS

—1

—

tAIC cycles3

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

—

Signal-to-noise plus distortion ratio

SINAD

—

59.1

—

Total Harmonic Distortion

THD

—

60.6

—

Spurious Free Dynamic Range

SFDR

—

61.1

—

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 0.1

μF 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.

6. Absolute error includes the effects of both gain error and offset error.

7. Please see the 56F8300Peripheral User’s Manual for additional information on ADC calibration.

8. ENOB = (SINAD - 1.76)/6.02

Table 10-24 ADC Parameters (Continued)

Characteristic

Symbol

Min

Typ

Max

Unit

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