LP311M [NSC]
LP311 Voltage Comparator; LP311电压比较器
| 型号： | LP311M |
| 厂家： | 
National Semiconductor |
| 描述： | LP311 Voltage Comparator |
| 文件： | 总6页 (文件大小：156K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
February 1995
LP311 Voltage Comparator
General Description
Features
Y
Low power drain, 900 mW on 5V supply
The LP311 is a low power version of the industry-standard
LM311. It takes advantage of stable high-value ion-implant-
ed resistors to perform the same function as an LM311, with
a 30:1 reduction in power drain, but only a 6:1 slowdown of
response time. Thus the LP311 is well suited for battery-
powered applications, and all other applications where fast
response is not needed. It operates over a wide range of
supply voltages from 36V down to a single 3V supply, with
less than 200 mA drain, but it is still capable of driving a 25
mA load. The LP311 is quite easy to apply without any oscil-
lation, if ordinary precautions are taken to minimize stray
coupling from the output to either input or to the balance
pins (as described in the LM311 datasheet Application
Hints).
Y
g
Operates from 15V or a single supply as low as 3V
Output can drive 25 mA
Y
Y
Y
Y
Y
Y
Emitter output can swing below negative supply
Response time: 1.2 ms
Same pin-out as LM311
Low input currents: 2 nA of offset, 15 nA of bias
b
Large common-mode input range:
14.6V to 13.6V
g
with 15V supply
Applications
Y
Level-detector for battery-powered instruments
Y
Y
Low-power lamp or relay driver
Low-power zero-crossing detector
Schematic Diagram
TL/H/5711–7
Connection Diagram
Dual-In-Line Package
Order Number LP311M or LP311N
See NS Package Numbers M08A or N08E
TL/H/5711–4
Top View
C
1995 National Semiconductor Corporation
TL/H/5711
RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Power Dissipation (Note 2)
500 mW
10 sec
Output Short Circuit Duration
Operating Temperature Range
Storage Temperature Range
0 C to 70 C
§
§
65 C to 150 C
Total Supply Voltage (V
)
36V
40V
40V
30V
30V
15V
8–4
b
§
§
Collector Output to Negative Supply Voltage (V
)
7–4
Lead Temperature (Soldering, 10 seconds)
260 C
§
Collector Output to Emitter Output
g
g
g
Emitter Output to Negative Supply Voltage (V
Differential Input Voltage
)
1–4
Input Voltage (Note 1)
Electrical Characteristics
g
s
s
T
A
e
These specifications apply for V
15V and 0 C
§
70 C, unless otherwise specified.
§
S
Parameter
Conditions
Min
Typ
2.0
2.0
15
Max
7.5
Units
mV
nA
s
25 C, R 100k
e
e
e
Input Offset Voltage (Notes 3, 4)
Input Offset Current (Notes 3, 4)
Input Bias Current (Note 3)
Voltage Gain
T
§
A
S
T
A
T
A
T
A
T
A
25 C
§
25
25 C
§
100
nA
e
e
5k
25 C, R
§
40
200
1.2
0.4
V/mV
ms
L
e
Response Time (Note 5)
Saturation Voltage (Note 6)
25 C
§
s
b
e
25 mA
V
T
10 mV, I
1.5
V
IN
OUT
e
A
25 C
§
e
Strobe Current (Note 7)
Output Leakage Current
T
25 C
§
100
200
0.2
300
100
mA
A
t
e
OUT
V
T
10 mV, V
35V
nA
IN
e
25 C
§
A
s
Input Offset Voltage (Notes 3, 4)
Input Offset Current (Notes 3, 4)
Input Bias Current (Note 3)
Input Voltage Range
R
S
100k
10
35
mV
nA
nA
V
150
Vb 0.5
Va 1.5
a
a
b
13.7, 14.7
b
b
Va 4.5V, V
0V
0.1
0.4
V
t
e
Saturation Voltage (Note 6)
s
s
1.6 mA
b
V
10 mV, I
IN
SINK
e
Positive Supply Current
Negative Supply Current
Minimum Operating Voltage
T
25 C, Output on
§
150
80
300
180
3.5
mA
mA
V
A
A
A
e
e
T
T
25 C
§
25 C
§
3.0
g
Note 1: This rating applies for 15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is equal to the
negative supply voltage or 30V below the positive supply, whichever is less.
Note 2: The maximum junction temperature of the LP311 is 85 C. For operating at elevated temperatures, devices in the dual-in-line package must be derated
§
based on a thermal resistance of 160 C/W, junction to ambient.
§
Note 3: The offset voltage, offset current and bias current specifications apply for any supply voltage from a single 4V supply up to 15V supplies.
g
Note 4: The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with 1 mA load. Thus, these
parameters define an error band and take into account the worst-case effects of voltage gain and input impedance.
Note 5: The response time specified is for a 100 mV input step with 5 mV overdrive.
a
s
b
3V).
Note 6: Saturation voltage specification applies to collector-emitter voltage (V7-1) for V
COLLECTOR
(V
Note 7: This specification gives the range of current which must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin
to ground. It should be current driven, 100 mA to 300 mA.
2
Typical Performance Characteristics
Input Characteristics
Input Bias Current
Input Offset Current
TL/H/5711–5
3
Typical Performance Characteristics (Continued)
Supply Current
Supply Current
Leakage Currents
TL/H/5711–6
Applications Information
For applications information and typical applications, refer to the LM311 datasheet.
Auxiliary Circuits
Strobing
Offset Balancing
TL/H/5711–2
TL/H/5711–1
Note: Do not ground strobe pin.
Test Circuits
Test Circuit 1 (Collector Output)
Test Circuit 2 (Emitter Output)
TL/H/5711–8
TL/H/5711–9
Test Circuit 3 (Collector Output)
Test Circuit 4 (Emitter Output)
TL/H/5711–10
TL/H/5711–11
4
Physical Dimensions inches (millimeters)
Order Number LP311M
NS Package Number M08A
5
Physical Dimensions inches (millimeters) (Continued)
Molded Dual-In-Line Package (N)
Order Number LP311N
NS Package Number N08E
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