PAC7112 datasheet(26/56 Pages) FREESCALE

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MAC7100 Microcontroller Family Hardware Specifications, Rev. 1.2

Preliminary

Electrical Characteristics

Freescale Semiconductor

3.10.2 ATD Accuracy

Table 29 and Table 30 specify the ATD conversion performance excluding any errors due to current

injection, input capacitance and source resistance.

For the following definitions, see Figure 9.

Differential Non-Linearity (DNL) is defined as the difference between two adjacent switching steps:

Eqn. 17

The Integral Non-Linearity (INL) is defined as the sum of all DNLs:

Eqn. 18

Table 29. ATD Conversion Performance in 5.0 V Range

Conditions shown in Table 7 except as noted here:

fATDCLK = 2.0 MHz, 4.5 V ≤ VDDA ≤ 5.5 V

Num C

Rating

Symbol

Min

Typ

Max

Unit

P 10-bit Resolution

LSB

—

5 1

NOTES:

1. Assumes VREF = VRH – VRL = 5.12 V, other VREF conditions result in different LSB resolutions.

—mV

P 10-bit Differential Nonlinearity

DNL

–1

—

Counts

P 10-bit Integral Nonlinearity

INL

–2.5

±1.5

2.5

Counts

P 10-bit Absolute Error 2

2. These values include the quantization error which is inherently ½ count for any A/D converter.

–3

±2.0

Counts

P 8-bit Resolution

LSB

—

20 1

—mV

P 8-bit Differential Nonlinearity

DNL

–0.5

—

0.5

Counts

P 8-bit Integral Nonlinearity

INL

–1.0

±0.5

1.0

Counts

P 8-bit Absolute Error 2

–1.5

±1.0

1.5

Counts

Table 30. ATD Conversion Performance in 3.3 V Range

Conditions shown in Table 7 except as noted here:

fATDCLK = 2.0 MHz, 3.15 V ≤ VDDA ≤ 3.6 V

Num C

Rating

Symbol

Min

Typ

Max

Unit

P 10-bit Resolution

LSB

—

3.25 1

NOTES:

1. Assumes VREF = VRH – VRL = 3.33 V, other VREF conditions result in different LSB resolutions.

—mV

P 10-bit Differential Nonlinearity

DNL

–1.5

—

1.5

Counts

P 10-bit Integral Nonlinearity

INL

–3.5

±1.5

3.5

Counts

P 10-bit Absolute Error 2

2. These values include the quantization error which is inherently ½ count for any A/D converter.

–5

±2.0

Counts

P 8-bit Resolution

LSB

—

13 1

—mV

P 8-bit Differential Nonlinearity

DNL

–0.5

—

0.5

Counts

P 8-bit Integral Nonlinearity

INL

–1.5

±1.0

1.5

Counts

P 8-bit Absolute Error 2

–1.5

±1.0

1.5

Counts

DNL i

()

–

1 LSB

----------------------

–

INL n

()

DNL i

()

∑

–

1 LSB

-------------------

–

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