18/22

ST92195B - ELECTRICAL CHARACTERISTICS

AC ELECTRICAL CHARACTERISTICS (Cont’d)

A/D CONVERTER, EXTERNAL TRIGGER TIMING TABLE

A/D CONVERTER. ANALOG PARAMETERS TABLE

Notes: (*)

The values are expected at 25 Celsius degrees with

(**)

’LSBs’ , as used here, as a value of

(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 ACCUR ACY= overall max conversion error

Symbol

Parameter

OSCIN divide by

2;min/max

OSCIN divide

by 1; min/max

Value

Unit

min

max

Pulse Width

1.5

INTCLK

ns

Pulse Distance

ns

Period/fast Mode

78+1

INTCLK

µs

Start Conversion Delay

0.5

1.5

INTCLK

Core Clock issued by Timing Controller

Pulse Width

ns

Pulse Distance

ns

Period/fast Mode

µs

Start Conversion Delay

ns

Parameter

Value

Unit

Note

typ (*)

min

max

(**)

Analog Input Range

V

Conversion Time Fast/Slow

78/138

INTCLK

(1,2)

Sample Time Fast/Slow

51.5/87.5

INTCLK

(1)

Power-up Time

60

µs

Resolution

8

bits

Differential Non Linearity

1.5

2.5

LSBs

(4)

Integral Non Linearity

2

3

LSBs

(4)

Absolute Accuracy

2

3

LSBs

(4)

Input Resistance

1.5

Kohm

(3)

Hold Capacitance

1.92

pF