© 2005 Microchip Technology Inc.

DS21891B-page 25

PS200

TABLE 5-11:

A/D CONVERTER CHARACTERISTICS

FIGURE 5-6:

A/D CONVERSION TIMING (NORMAL MODE)

Param

No.

Sym

Characteristic

Min

Typ†

Max

Units

Conditions

A01

Resolution

—

—

10 bits

bit

A02

——

A03

Integral Error

—

—

A04

Differential Error

—

—

±1

LSb No missing codes to 10 bits,

A05

Full-Scale Range

2.2*

—

5.5*

V

A06

Offset Error

—

—

A07

Gain Error

—

—

A10

—

Monotonicity

—

——

A20

A20A

Reference Voltage

2.5

——

V

Absolute minimum to ensure

10-bit accuracy

A25

Analog Input Voltage

V

A30

Recommended

Impedance of Analog

Voltage Source

——

10

k

Ω

A50

10

—

—

—

1000

10

μA

μA

During A/D conversion cycle.

*

These parameters are characterized but not tested.

† Data in ‘Typ’ column is at 5.0V, 25

°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Note 1:

Total Absolute Error includes Integral, Differential, Offset and Gain Errors.

2:

The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.

3:

4:

5:

131

130

132

Q4

A/D CLK

A/D DATA

ADRES

ADIF

GO

SAMPLE

OLD_DATA

SAMPLING STOPPED

DONE

NEW_DATA

98

7

3

2

1

0

Note 1:

SLEEP

instruction to be executed.

6

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