1540 查看數據表（PDF） - Linear Technology
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1540 Datasheet PDF : 12 Pages
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LTC1540
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature
0.5
V + = 5V
V – = GND = 0V
0.4
V + = 3V
V – = GND = 0V
0.3
V + = 2V
0.2
V – = GND = 0V
0.1
0
– 60 – 40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
1540 G01
Reference Voltage
Load Regulation (Source)
5 V + = 5V
V – = GND = 0V
4 TA = 25°C
3
2
1
0
0
1
2
3
4
OUTPUT SOURCE CURRENT (mA)
1540 G04
Comparator Short-Circuit Current
vs Supply Voltage
200
TA = 25°C
180
160
OUTPUT
CONNECTED TO
140 V – = GND = 0V;
SOURCE
120
CURRENT
100
80
60
40
OUTPUT
CONNECTED
TO V +; SINK
CURRENT
20
0
0 1 2 3 4 5 6 7 8 9 10
SUPPLY VOLTAGE (V)
1540 G07
Reference Voltage vs Temperature
1.190
V + = 5V
1.188 V – = GND = 0V
1.186
1.184
1.182
1.180
1.178
1.176
1.174
1.172
– 60 – 40 – 20 0 20 40 60
TEMPERATURE (°C)
80 100
1540 G02
Comparator Output Voltage (High)
vs Load Current
5
TA = 25°C
V+ = 5V
4
3
V+ = 3V
2
1
V+ = 2V
0
0 10 20 30 40 50 60 70 80
LOAD CURRENT (mA)
1540 G05
Comparator Response Time
vs Input Overdrive
80
75
TVA+
=
=
25°C
5V
V – = GND = 0V
70
65
60
55
tPLH
50
tPHL
45
40
35
30
10 20 30 40 50 60 70 80 90 100 110
INPUT VOLTAGE (mV)
1540 G08
4
Reference Voltage
Load Regulation (Sink)
10
V + = 5V
9 V – = GND = 0V
8 TA = 25°C
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30 35 40
OUTPUT SINK CURRENT (µA)
1540 G03
Comparator Output Voltage (Low)
vs Load Current
2.5
TA = 25°C
2.0
V+ = 3V
V+ = 2V
1.5
V+ = 5V
1.0
0.5
0
0 10 20 30 40 50 60 70 80
LOAD CURRENT (mA)
1540 G06
Hysteresis Control
80
60
40
20
0
– 20
– 40
– 60
– 80
0
10
20
30
40
50
VREF – VHYST (mV)
1540 G09
sn1540 1540fas
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