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V

refT *

V

refB

2

TLC55025M

8BIT ANALOGTODIGITAL CONVERTER

SGLS067 − MARCH 1992

POST OFFICE BOX 655303

4−182

FUNCTION TABLE

STEP

ANALOG INPUT

VOLTAGE†

DIGITAL OUTPUT

CODE

0

0.000 V

L

L

L

L

L

L

L

L

1

0.019 V

L

LL

L

L

L

L

H

127

2.413 V

L

HH H H

H

H H

128

2.432 V

H

LL

L

L

L

L

L

129

2.451 V

H

LL

L

L

L

L

H

254

4.826 V

H

HH H H

H

H L

255

4.845 V

H

H

H H H

H

H H

† These values are based on the assumption that VrefB and VrefT have

been adjusted so that the voltage at the transition from digital 0 to 1

(VZT) is 0 V and the transition to full scale (VFT) is 4.8545 V. 1 LSB

= 19 mV.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−55

°C to 125°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

−55

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NOTE 1: Voltages at analog inputs and ANLG VDD are with respect to the ANLG GND terminals. Voltages at the digital outputs and DGTL VDD

are with respect to the DGTL GND terminals.

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, ANLG VDD

4.75

5

5.25

V

Supply voltage, DGTL VDD

4.75

5

5.25

V

High-level input voltage, VIH, CLK

2

V

Low-level input voltage VIL, CLK

0.8

V

Input voltage at analog input, VI

0

5

V

Analog reference voltage (top side), VrefT

ANLG

VDD

V

Analog reference voltage (midpoint), VrefM

V

Analog reference voltage (bottom side), VrefB

0

V

Differential reference voltage, VrefT − VrefB

5

V

High-level output current, IOH

− 400

µA

Low-level output current, IOL

4

mA

Clock pulse duration, high or low, twH or twL

50

ns

Operating free-air temperature, TA

−55

125

°C