ST92185B datasheet(171/178 Pages) STMICROELECTRONICS

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ST92185B - ELECTRICAL CHARACTERISTICS

AC ELECTRICAL CHARACTERISTICS (Cont’d)

A/D CONVERTER, EXTERNAL TRIGGER TIMING TABLE

(VDD= 5V +/-10%; TA= 0 to 70°C; unless otherwise specified

A/D CONVERTER. ANALOG PARAMETERS TABLE

(VDD= 5V +/-10%; TA= 0 to 70°C; unless otherwise specified))

Notes: (*)

The values are expected at 25 Celsius degrees with

VDD= 5V

(**)

’LSBs’ , as used here, as a value of

VDD/256

(1)

@ 24 MHz external clock

(2)

including Sample time

(3)

it must be considered as the on-chip series resistance before the sampling capacitor

(4)

DNL ERROR= max {[V(i) -V(i-1)] / LSB-1}

INL ERROR= max {[V(i) -V(0)] / LSB-i}

ABSOLUTE ACCURACY= overall max conversion error

Symbol

Parameter

OSCIN divide by

2;min/max

OSCIN divide

by 1; min/max

Value

Unit

min

max

Tlow

Pulse Width

1.5

INTCLK

Thigh

Pulse Distance

Text

Period/fast Mode

78+1

INTCLK

µs

Tstr

Start Conversion Delay

0.5

1.5

INTCLK

Core Clock issued by Timing Controller

Tlow

Pulse Width

Thigh

Pulse Distance

Text

Period/fast Mode

µs

Tstr

Start Conversion Delay

Parameter

Value

Unit

Note

typ (*)

min

max

(**)

Analog Input Range

VSS

VDD

Conversion Time Fast/Slow

78/138

INTCLK

(1,2)

Sample Time Fast/Slow

51.5/87.5

INTCLK

(1)

Power-up Time

µs

Resolution

bits

Differential Non Linearity

LSBs

(4)

Integral Non Linearity

LSBs

(4)

Absolute Accuracy

LSBs

(4)

Input Resistance

1.5

Kohm

(3)

Hold Capacitance

1.92

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