TLC545C, TLC545I, TLC546C, TLC546I

8-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL AND 19 INPUTS

SLAS066B – DECEMBER 1985 – REVISED OCTOBER 1996

7

POST OFFICE BOX 655303

operating characteristics over recommended operating free-air temperature range,

PARAMETER

TEST CONDITIONS

TLC545

TLC546

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

EL

Linearity error

See Note 5

±0.5

±0.5

LSB

EZS

Zero-scale error

See Note 6

±0.5

±0.5

LSB

EFS

Full-scale error

See Note 6

±0.5

±0.5

LSB

Total unadjusted error

See Note 7

±0.5

±0.5

LSB

Self-test output code

INPUT A19 address = 10011

(see Note 8)

01111101

(125)

10000011

(131)

01111101

(125)

10000011

(131)

tconv

Conversion time

See Operating Sequence

9

17

µs

Total access and

conversion time

See Operating Sequence

13

25

µs

tacq

Channel acquisition time

(sample cycle)

See Operating Sequence

3

3

I/O

clock

cycles

tv

Time output data remains

valid after I/O CLOCK

↓

10

10

ns

td

Delay time, I/O CLOCK to

DATA OUT valid

300

400

ns

ten

Output enable time

See Parameter

150

150

ns

tdis

Output disable time

See Parameter

Measurement Information

150

150

ns

tr(bus)

Data bus rise time

300

300

ns

tf(bus)

Data bus fall time

300

300

ns

NOTES:

5. Linearity error is the maximum deviation from the best straight line through the A/D transfer characteristics.

6. Zero-scale error is the difference between 00000000 and the converted output for zero input voltage; full-scale error is the difference

between 11111111 and the converted output for full-scale input voltage.

7. Total unadjusted error is the sum of linearity, zero-scale, and full-scale errors.

8. Both the input address and the output codes are expressed in positive logic. The INPUT A19 analog input signal is internally

generated and is used for test purposes.