PXR40 datasheet(68/100 Pages) FREESCALE

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PXR40 Microcontroller Data Sheet, Rev. 1

Electrical characteristics

Freescale Semiconductor

5.9

eQADC electrical characteristics

Table 17. eQADC Conversion Specifications (Operating)

Spec

Characteristic

Symbol

Min

Max

Unit

ADC Clock (ADCLK) Frequency

fADCLK

216

MHz

Conversion Cycles

Single Ended Conversion Cycles 12 bit resolution

Single Ended Conversion Cycles 10 bit resolution

Single Ended Conversion Cycles 8 bit resolution

Note: Differential conversion (min) is one clock

cycle less than the single-ended

conversion values listed here.

2+14

2+12

2+10

128 + 14

128 + 12

128 + 10

ADCLK cycles

Stop Mode Recovery Time1

1 Stop mode recovery time is the time from the setting of either of the enable bits in the ADC Control Register to the time that

the ADC is ready to perform conversions. Delay from power up to full accuracy = 8 ms.

TSR

—

s

Resolution2

2 At V

RH –VRL = 5.12 V, one count = 1.25 mV without using pregain.

—1.25

—

INL: 8 MHz ADC Clock3

3 INL and DNL are tested from V

RL + 50 LSB to VRH – 50 LSB. The eQADC is guaranteed to be monotonic at 10 bit accuracy

(12 bit resolution selected).

INL8

–44

4 New design target. Actual specification will change following characterization. Margin for manufacturing has not been fully

included.

LSB5

5 At V

RH –VRL = 5.12 V, one LSB = 1.25 mV.

INL: 16 MHz ADC Clock3

INL16

–84

LSB

DNL: 8 MHz ADC Clock3

DNL8

–34

LSB

DNL: 16 MHz ADC Clock3

DNL16

–34

LSB

Offset Error without Calibration

OFFNC

1004

LSB

Offset Error with Calibration

OFFWC

–44

LSB

Full Scale Gain Error without Calibration

GAINNC

–1204

LSB

Full Scale Gain Error with Calibration

GAINWC

–44,6

6 The value is valid at 8 MHz, it is ±8 counts at 16 Mhz.

44,6

LSB

Non-Disruptive Input Injection Current 7, 8, 9, 10

7 Below disruptive current conditions, the channel being stressed has conversion values of $3FF for analog inputs greater than

VRH and $000 for values less than VRL. Other channels are not affected by non-disruptive conditions.

IINJ

–3



Incremental Error due to injection current11, 12

EINJ

–44

Counts

TUE value at 8 MHz 13, 14 (with calibration)

TUE8

–44,6

44,6

Counts

TUE value at 16 MHz 13, 14 (with calibration)

TUE16

–8

Counts

Maximum differential voltage15

(DANx+ - DANx-) or (DANx- - DANx+)

PREGAIN set to 1X setting

PREGAIN set to 2X setting

PREGAIN set to 4X setting

DIFFmax

DIFFmax2

DIFFmax4

—

(VRH –VRL)/2

(VRH –VRL)/4

(VRH -VRL)/8

Differential input Common mode voltage15

(DANx- + DANx+)/2

DIFFcmv

(VRH –VRL)/2

–5%

(VRH –VRL)/2

+5%

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