Datasheet

3
LTC1045
1045fc
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The maximum differential voltage between any two power pins
(V
+
, V
–
, V
OH
and V
OL
) must not exceed 18V. The maximum recommended
operating differential is 15V.
Note 3: During operation near the maximum supply voltage limit, care
should be taken to avoid or suppress power supply turn-on and turn-off
transients, power supply ripple or ground noise; any of these conditions
must not cause a supply differential to exceed the absolute maximum
rating.
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
I
+
vs Temperature
Delay Time vs R
SET
R
SET
(Ω)
5
4
3
2
1
0
100 10k 100k 1M
1045 G02
1k
V
+
TO V
–
CURRENT (mA)
T
A
= 25°C
V
+
= V
OH
= 5V
V
–
= V
OL
= 0V
I
+
vs R
SET
R
SET
(Ω)
DELAY TIME (µs)
1.2
1.0
0.8
0.6
0.4
0.2
0
100 10k 100k 1M
1045 G03
1k
T
A
= 25°C
V
+
= V
OH
= 5V
V
–
= V
OL
= 0V
V
IN
= V
TRIP
±100mV
V
REF
vs Temperature
TEMPERATURE (°C)
–50
VOLTAGE ON I
SET
PIN (V)
2.5
2.0
1.5
1.0
0.5
0.1
250
75
100
1045 G04
–25
50
125
V
+
= 5V
R
SET
= 10k
R
SET
= 1M
R
SET
(Ω)
20
18
16
14
12
10
8
6
4
2
0
100 10k 100k 1M
1045 G05
1k
COMPARATOR HYSTERESIS (mV)
V
+
= 5V
Hysteresis vs R
SET
TEMPERATURE (°C)
–50
V
+
TO V
–
CURRENT (mA)
5
4
3
2
1
0
250
75
100
1045 G01
–25
50
125
V
+
= 5V
R
SET
= 0
R
SET
= 10k
R
SET
= 1M
t
d
Response Time Test Circuit Figure 1 250 ns
R
SET
= 10k, ±100mV Drive ● 350 ns
t
SETUP
Time Before Rising Edge of I
SET
that Test Circuit Figure 2 80 ns
Data Must Be Present
t
HOLD
Time After Rising Edge of I
SET
that Test Circuit Figure 2 0 ns
Data Must Be Present
t
ACC
Falling Edge of DISABLE to Logic Test Circuit Figure 3 165 ns
Level (from Hi-Z State)
t
IH
, t
OH
Rising Edge of DISABLE to Hi-Z State Test Circuit Figure 3 200 ns
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
AC ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= V
OH
= 5V, V
–
= V
OL
= 0V, unless otherwise specified.