Datasheet
TLC0831C, TLC0831I
TLC0832C, TLC0832I
8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL
SLAS107B – JANUARY 1995 – REVISED APRIL 1996
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended range of operating free-air temperature, V
CC
= 5 V,
f
clock
= 250 kHz (unless otherwise noted)
digital section
PARAMETER
TEST CONDITIONS
†
C SUFFIX I SUFFIX
UNIT
PARAMETER
TEST
CONDITIONS
†
MIN TYP
‡
MAX MIN TYP
‡
MAX
UNIT
V
OH
High level out
p
ut voltage
V
CC
= 4.75 V, I
OH
= –360 µA 2.8 2.4
V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
V
CC
= 4.75 V, I
OH
= –10 µA 4.6 4.5
V
V
OL
Low-level output voltage V
CC
= 4.75 V, I
OL
= 1.6 mA 0.34 0.4 V
I
IH
High-level input current V
IH
= 5 V 0.005 1 0.005 1 µA
I
IL
Low-level input current V
IL
= 0 –0.005 –1 –0.005 –1 µA
I
OH
High-level output
(source) current
V
OH
=
V
O,
T
A
= 25°C –6.5 –24 –6.5 –24 mA
I
OL
Low-level output (sink) current V
OL
= V
CC
, T
A
= 25°C 8 26 8 26 mA
I
OZ
High-impedance-state output
V
O
= 5 V, T
A
= 25°C 0.01 3 0.01 3
µA
I
OZ
g
current (DO)
V
O
= 0, T
A
= 25°C
–0.01 –3 –0.01 –3
µ
A
C
i
Input capacitance 5 5 pF
C
o
Output capacitance 5 5 pF
†
All parameters are measured under open-loop conditions with zero common-mode input voltage.
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
analog and converter section
PARAMETER TEST CONDITIONS
†
MIN TYP
‡
MAX UNIT
V
IC
Common-mode input voltage See Note 3
–0.05
to
V
CC
+0.05
V
On channel V
I
= 5 V 1
I
I( tdb )
Standby in
p
ut current (see Note 4)
Off channel V
I
= 0 –1
µA
I
I(stdby)
Standb
y
inp
u
t
c
u
rrent
(see
Note
4)
On channel V
I
= 0 –1
µ
A
Off channel V
I
= 5 V 1
r
i(REF)
Input resistance to REF 1.3 2.4 5.9 kΩ
†
All parameters are measured under open-loop conditions with zero common-mode input voltage.
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
NOTES: 3. When channel IN– is more positive than channel IN+, the digital output code is 0000 0000. Connected to each analog input are two
on-chip diodes that conduct forward current for analog input voltages one diode drop above V
CC
. Care must be taken during testing
at low V
CC
levels (4.5 V) because high-level analog input voltage (5 V) can, especially at high temperatures, cause the input diode
to conduct and cause errors for analog inputs that are near full scale. As long as the analog voltage does not exceed the supply
voltage by more than 50 mV, the output code is correct. To achieve an absolute 0- to 5-V input range requires a minimum V
CC
of
4.95 V for all variations of temperature and load.
4. Standby input currents go in or out of the on or off channels when the A/D converter is not performing conversion and the clock is
in a high or low steady-state conditions.
total device
PARAMETER MIN TYP
‡
MAX UNIT
I
CC
Su
pp
ly current
TLC0831 0.6 1.25
mA
I
CC
S
u
ppl
y
c
u
rrent
TLC0832 2.5 4.7
mA
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.