LTC1045 查看數據表（PDF） - Linear Technology
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LTC1045 Datasheet PDF : 20 Pages
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LTC1045
AC ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V + = VOH = 5V, V – = VOL = 0V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
td
Response Time
tSETUP
tHOLD
tACC
tIH, tOH
Time Before Rising Edge of ISET that
Data Must Be Present
Time After Rising Edge of ISET that
Data Must Be Present
Falling Edge of DISABLE to Logic
Level (from Hi-Z State)
Rising Edge of DISABLE to Hi-Z State
Test Circuit Figure 1
RSET = 10k, ±100mV Drive
Test Circuit Figure 2
Test Circuit Figure 2
Test Circuit Figure 3
Test Circuit Figure 3
250
ns
q
350
ns
80
ns
0
ns
165
ns
200
ns
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 –, VOH and VOL) 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
I + vs Temperature
5
4
V+ = 5V
3
RSET = 0
2
RSET = 10k
1
0
–50 –25
RSET = 1M
0 25 50 75
TEMPERATURE (°C)
100 125
1045 G01
I + vs RSET
5
4
3
VTA+
V–
=
=
=
25°C
VOH =
VOL =
5V
0V
2
1
0
100
1k
10k
100k
1M
RSET (Ω)
1045 G02
Delay Time vs RSET
1.2
1.0
VTA+
V–
=
=
=
25°C
VOH =
VOL =
5V
0V
VIN = VTRIP ±100mV
0.8
0.6
0.4
0.2
0
100
1k
10k
RSET (Ω)
VREF vs Temperature
2.5
V+ = 5V
2.0
RSET = 1M
1.5
1.0
RSET = 10k
0.5
0.1
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1045 G04
Hysteresis vs RSET
20
18
16
14
12
10
8
6
4
2
0
100
1k
10k
RSET (Ω)
V+ = 5V
100k
1M
1045 G05
100k
1M
1045 G03
1045fc
3
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