TLC545C_13 Datasheet, PDF (7/15 Pages) Texas Instruments – 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 19 INPUTS

TLC545C, TLC545I, TLC546C, TLC546I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 19 INPUTS
SLAS066B – DECEMBER 1985 – REVISED OCTOBER 1996
operating characteristics over recommended operating free-air temperature range,
V_CC = V_ref+ = 4.75 V to 5.5 V, f_clock(I/O) = 2.048 MHz for TLC545 or 1.1 MHz for TLC546,
f_clock(SYS) = 4 MHz for TLC545 or 2.1 MHz for TLC546
PARAMETER
TEST CONDITIONS
TLC545
MIN TYP
MAX
TLC546
MIN TYP
UNIT
MAX
EL
Linearity error
EZS Zero-scale error
EFS Full-scale error
Total unadjusted error
See Note 5
See Note 6
See Note 6
See Note 7
± 0.5
± 0.5
± 0.5
± 0.5
± 0.5 LSB
± 0.5 LSB
± 0.5 LSB
± 0.5 LSB
Self-test output code
INPUT A19 address = 10011 01111101
(see Note 8)
(125)
10000011 01111101
(131)
(125)
10000011
(131)
tconv
Conversion time
Total access and
conversion time
See Operating Sequence
See Operating Sequence
9
17 µs
13
25 µs
Channel acquisition time
tacq
(sample cycle)
See Operating Sequence
I/O
3
3 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
tdis
tr(bus)
tf(bus)
NOTES:
Output enable time
Output disable time
See Parameter
Measurement Information
150
150 ns
150
150 ns
Data bus rise time
300
300 ns
Data bus fall time
300
300 ns
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.
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