T83C51SND1-ROTIL datasheet(37/60 Pages) ATMEL

37 / 60 page

T8xC51SND1

Rev. D – 15-Nov-01

11.3 DC Characteristics - A to D Converter

Table 40. A to D Converter DC Characteristics

VDD= 2.7 to 3.3 V, TA= -40 to +85

°C

11.4 DC Characteristics - Oscillator & Crystal

11.5.1 Schematic

Figure 13. Crystal Connection

Note:

For operation with most standard crystals, no external components are needed on X1

and X2. It may be necessary to add external capacitors on X1 and X2 to ground in spe-

cial cases (max 10 pF). X1 and X2 may not be used to drive other circuits.

11.6.2 Parameters

Table 41. Oscillator & Crystal Characteristics

VDD= 2.7 to 3.3 V, TA= -40 to +85

°C

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

AVDD

Analog Supply Voltage

2.7

3.3

Analog Operating Supply

Current

600

µA

AVDD= 3.3V

AIN1:0= 0 to AV

AIPD

Analog Standby Current

µA

DD= 3.3V

ADEN= 0 or PD= 1

Analog Input Voltage

AVREF

Reference Voltage

AREFN

REFP

AVSS

2.4

REF

AREF Input Resistance

Ω

A= 25°C

Analog Input capacitance

A= 25°C

VSS

Symbol

Parameter

Min

Typ

Max

Unit

Internal Capacitance (X1 - VSS)

Internal Capacitance (X2 - VSS)

Equivalent Load Capacitance (X1 - X2)

Drive Level

µW

Crystal Frequency

MHz

Crystal Series Resistance

Ω

Crystal Shunt Capacitance

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