MPC5604PFF0MLL7R datasheet(56/84 Pages) FREESCALE

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MPC5604P Microcontroller Data Sheet, Rev. 5

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

3.13.2

ADC conversion characteristics

Table 29. ADC conversion characteristics

Symbol

Parameter

Conditions1

1 V

DD = 3.3V to 3.6V / 4.5V to 5.5V, TA = –40 to +125 °C, unless otherwise specified and analog input voltage from

VSS_HV_ADCx to VDD_HV_ADCx.

Value

Unit

Min

Typ

Max

fCK

SR ADC Clock frequency

(depends on ADC

configuration)

(The duty cycle depends on

AD_clk2 frequency)

2 AD_clk clock is always half of the ADC module input clock defined via the auxiliary clock divider for the ADC.

—33

3 When configured to allow 60 MHz ADC, the minimum ADC clock speed is 9 MHz, below which precision is lost.

—60

MHz

SR Sampling frequency

—

1.53

MHz

tADC_S

Sample time4

4 During the sample time the input capacitance CS can be charged/discharged by the external source. The internal

resistance of the analog source must allow the capacitance to reach its final voltage level within tADC_S. After the

end of the sample time tADC_S, changes of the analog input voltage have no effect on the conversion result. Values

for the sample clock tADC_S depend on programming.

fADC = 20 MHz,

INPSAMP = 3

125

fADC = 9 MHz,

INPSAMP = 255

28.2

µs

tADC_C

Conversion time5

fADC = 20 MHz

INPCMP = 1

0.650

—

µs

ADC input sampling

capacitance

——

—

2.5

CP1

ADC input pin capacitance 1

—

CP2

ADC input pin capacitance 2

—

RSW1

Internal resistance of analog

source

VDD_HV_ADC = 5 V+/-10%

—

0.6

VDD_HV_ADC = 3.3 V+/-10%

—

RAD

Internal resistance of analog

source

——

—

IINJ

Input current injection

Current injection on one ADC input,

different from the converted one.

Remains within TUE spec.

-5

—

INL

Integral Non Linearity

No overload

–1.5

—

1.5

LSB

DNL

Differential Non Linearity

No overload

–1.0

—

1.0

LSB

OFS

Offset error

—

±1

—

LSB

GNE

Gain error

—

±1

—

LSB

TUE

Total unadjusted error

without current injection

—

-2.5

—

2.5

LSB

TUE

Total unadjusted error with

current injection

—-3

—

LSB

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