MPC5601PEF0MLL4R datasheet(62/95 Pages) FREESCALE

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MPC5602P Microcontroller Data Sheet, Rev. 4.1

Freescale Semiconductor

3.14.2

ADC conversion characteristics

Table 28. ADC conversion characteristics

Symbol

Parameter

Conditions1

1 VDD = 3.3 V to 3.6 V / 4.5 V to 5.5 V, TA = 40 °C to TA MAX, unless otherwise specified and analog input voltage

from VSS_HV_ADC0 to VDD_HV_ADC0.

Value

Unit

Min

Typ

Max

fCK

SR — ADC clock frequency (depends on

ADC configuration)

(The duty cycle depends on ADC

clock2 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 the precision is lost.

—60

MHz

SR — Sampling frequency

—

1.53 MHz

— D Sampling time4

4 During the sampling 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 ts. After the end of

the sampling time ts, changes of the analog input voltage have no effect on the conversion result. Values for the

sample clock ts depend on programming.

fADC = 20 MHz, INPSAMP = 3

125

—

fADC = 9 MHz, INPSAMP = 255

—

28.2

µs

— P Conversion time5

5 This parameter includes the sampling time ts.

fADC = 20 MHz6, INPCMP = 1

0.650

—

µs

tADC_PU SR — ADC power-up delay (time needed for

ADC to settle exiting from software

power down; PWDN bit = 0)

——

—

1.5

µs

CS7

— D ADC input sampling capacitance

—

2.5

CP17

— D ADC input pin capacitance 1

—

CP27

— D ADC input pin capacitance 2

—

RSW17 — D Internal resistance of analog source VDD_HV_ADC0 = 5 V ± 10%

—

0.6



VDD_HV_ADC0 = 3.3 V ± 10%

—



RAD7

— D Internal resistance of analog source

—



IINJ

— T Input current injection

Current injection on one ADC

input, different from the

converted one. Remains

within TUE specification

5—

INL

CC P Integral non-linearity

No overload

1.5

—

1.5

LSB

DNL

CC P Differential non-linearity

No overload

1.0

—

1.0

LSB

CC T Offset error

—

±1

—

LSB

CC T Gain error

—

±1

—

LSB

TUE

CC P Total unadjusted error without current

injection

—

2.5

—

2.5

LSB

TUE

CC T Total unadjusted error with current

injection

—

3—

LSB

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