4
LTC1293/LTC1294/LTC1296
129346fs
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
CC
= 5.25V ● 2.0 V
V
IL
Low Level Input Voltage V
CC
= 4.75V ● 0.8 V
I
IH
High Level Input Current V
IN
= V
CC
● 2.5 µA
I
IL
Low Level Input Current V
IN
= 0V ● –2.5 µA
V
OH
High Level Output Voltage V
CC
= 4.75V, I
O
= –10mA 4.7 V
I
O
= 360µA ● 2.4 4.0
V
OL
Low Level Output Voltage V
CC
= 4.75V, I
O
= 1.6mA ● 0.4 V
I
OZ
High Z Output Leakage V
OUT =
V
CC
,
CS High ● 3 µA
V
OUT
= 0V, CS High ● –3
I
SOURCE
Output Source Current V
OUT
= 0V –20 mA
I
SINK
Output Sink Current V
OUT
= V
CC
20 mA
I
CC
Positive Supply Current CS High ● 612 mA
I
CC
Positive Supply Current CS High, LTC1294BC, LTC1294CC, ● 510 µA
Power LTC1294DC, LTC1294BI,
Shutdown LTC1294CI, LTC1294DI,
CLK Off LTC1294BM, LTC1294CM,
● 515 µA
LTC1294DM
I
REF
Reference Current CS High ● 10 50 µA
I
–
Negative Supply Current CS High ● 150 µA
I
SOURCEs
SSO Source Current V
SSO
= 0V ● 0.8 1.5 mA
I
SINKs
SSO Sink Current V
SSO
= V
CC
● 0.5 1.0 mA
E
LECTR
IC
AL C CHARA TER ST
ICS
DIGITAL
A
D
U
I
DC
(Note 3)
LTC1293/4/6B
LTC1293/4/6C
LTC1293/4/6D
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to DGND, AGND and REF
–
wired
together (unless otherwise noted).
Note 3: V
CC
= 5V, V
REF
+ = 5V, V
REF
– = 0V, V
–
= 0V for unipolar mode and
–5V for bipolar mode, CLK = 1.0MHz unless otherwise specified. The
●
denotes specifications which apply over the full operating temperature
range; all other limits and typicals T
A
= 25°C.
Note 4: These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2V
REF
) divided by 4096.
For example, when V
REF
= 5V, 1LSB (bipolar) = 2 (5V)/4096 = 2.44mV.
Note 5: Linearity error is specified between the actual end points of the A/
D transfer curve. The deviation is measured from the center of the
quantization band.
Note 6: Recommended operating conditions.
Note 7: Two on-chip diodes are tied to each reference and analog input
which will conduct for reference or analog input voltages one diode drop
below V
–
or one diode drop above V
CC
. Be careful during testing at low
V
CC
levels (4.5V), as high level reference or analog inputs (5V) can cause
this input diode to conduct, especially at elevated temperatures, and cause
errors for inputs near full scale. This spec allows 50mV forward bias of
either diode. This means that as long as the reference or analog input
does not exceed the supply voltage by more than 50mV, the output code
will be correct. To achieve an absolute 0V to 5V input voltage range will
therefore require a minimum supply voltage of 4.950V over initial
tolerance, temperature variations and loading.
Note 8: Channel leakage current is measured after the channel selection.
