MPC5510 datasheet(34/54 Pages) FREESCALE

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MPC5510 Microcontroller Family Data Sheet, Rev. 2

Preliminary—Subject to Change Without Notice

Electrical Characteristics

Freescale Semiconductor

2.10

eQADC Electrical Characteristics

Table 15. eQADC Conversion Specifications (Operating)

Num

Characteristic

Symbol

Min

Max

Unit

ADC Clock (ADCLK) Frequency1

1 Conversion characteristics vary with F

ADCLK rate. Reduced conversion accuracy occurs at maximum FADCLK rate. The

maximum value is based on 800KS/s and the minimum value is based on 20MHz oscillator clock frequency divided by a

maximum 16 factor.

FADCLK

112

MHz

Conversion Cycles

14+2 (or 16)

14+128 (or 142)

ADCLK

cycles

Stop Mode Recovery Time2

2 The specified value is for the case when the 100nF capacitor is not connected to the REFBYPC pin. When the capacitor is

connected to the REFBPYC pin, the recovery time is 10ms.

TSR

—

μs

Resolution

—

1.25

—

INL: 12 MHz ADC Clock3

3 At V

RH – VRL = 5.12 V, one lsb = 1.25 mV = one count, this is an additional count error to the TUE count error.

INL12

—

Counts

DNL: 12 MHz ADC Clock3

DNL12

—

Counts

Offset Error with Calibration3

OFFWC

—

Counts

Full Scale Gain Error with Calibration

GAINWC

—

Counts

Disruptive Input Injection Current 4, 5, 6, 7

4 Below disruptive current conditions, the channel being stressed has conversion values of 0x3FF for analog inputs greater than

VRH and 0x000 for values less than VRL. This assumes that VRH ≤ VDDA and VRL ≥ VSSA due to the presence of the sample

amplifier. Other channels are not affected by non-disruptive conditions.

5 Exceeding limit may cause conversion error on stressed channels and on unstressed channels. Transitions within the limit do

not affect device reliability or cause permanent damage.

6 Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate

resistance values using VPOSCLAMP = VDDA + 0.5V and VNEGCLAMP = – 0.3 V, then use the larger of the calculated values.

7 Condition applies to two adjacent pads on the internal pad.

IINJ

—±1

Incremental Error due to injection current. All channels have

same 10k

Ω < Rs <100kΩ 3

Channel under test has Rs=10k

Ω,

IINJ=IINJMAX,IINJMIN

EINJ

—

±6

Counts

Total Unadjusted Error for single ended conversions with

calibration3, 8, 9, 10

8 The TUE specification will always be better than the sum of the INL, DNL, offset, and gain errors due to canceling errors.

9 TUE includes all internal device error such as internal reference variation (75% Ref, 25% Ref)

10 Depending on the customer input impedance, the Analog Input Leakage current (DC Electrical specification) may affect the

actual TUE measured on analog channels shared digital pins.

TUE

—

±10

Counts

Source Impedance11

11 If R

S is greater than 1 k Ohm, be sure to calculate the affect of pin leakage and use the proper sampling time, to ensure that

you get the accuracy required.

—

100k

Ohm

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