LP324M [NSC]
Micropower Quad Operational Amplifier; 微功耗四路运算放大器
| 型号： | LP324M |
| 厂家： | 
National Semiconductor |
| 描述： | Micropower Quad Operational Amplifier |
| 文件： | 总10页 (文件大小：327K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 1999
LP2902/LP324
Micropower Quad Operational Amplifier
General Description
Features
n Low supply current: 125 µA (max)
n Low offset voltage: 2 mV (max)
n Low input bias current: 4 nA (max)
n Input common mode to GND
The LP324 series consists of four independent, high gain in-
ternally compensated micropower operational amplifiers.
These amplifiers are specially suited for operation in battery
systems while maintaining good input specifications, and ex-
tremely low supply current drain. In addition, the LP324 has
an input common mode range, and output source range
which includes ground, making it ideal in single supply appli-
cations.
n Interfaces to CMOS logic
n Wide supply range: 3V
n Small Outline Package available
n Pin-for-pin compatible with LM324
+
<
<
32V
V
These amplifiers are ideal in applications which include por-
table instrumentation, battery backup equipment, and other
circuits which require good DC performance and low supply
current.
Connection Diagram
Simplified Schematic
Dual-In-Line (N) and SO (M)
DS008562-1
Order Number LP324M or LP2902M
See NS Package Number M14A
Order Number LP324N or LP2902N
See NS Package Number N14A
DS008562-2
© 1999 National Semiconductor Corporation
DS008562
www.national.com
Absolute Maximum Ratings (Note 1)
Operating Conditions
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Package
N
M
Power Dissipation
(Note 4)
500 mW
500 mW
±
32V or 16V
Supply Voltage
±
LP2902
26V or 13V
Tj Max
150˚C
90˚C/W
(Note 5)
150˚C
140˚C/W
(Note 5)
Differential Input Voltage
LP2902
32V
26V
θja
Operating Temp. Range
Storage Temp. Range
Soldering
Input Voltage (Note 2)
LP2902
−0.3V to 32V
−0.3V to 26V
Continuous
−65˚C ≤ T ≤ 150˚C
Output Short-Circuit to GND
(One Amplifier) (Note 3)
V+ ≤ 15V and TA 25˚C
ESD Susceptibility (Note 10)
Information (10 sec.)
Vapor Phase (60 sec.)
Infrared (15 sec.)
300˚C
260˚C
215˚C
220˚C
=
±
500V
Electrical Characteristics (Note 6)
LP2902 (Note 9)
LP324
Tested
Symbol
Parameter
Conditions
Tested
Limit
Design
Limit
Design
Limit
(Note 8)
9
Units
Typ
Typ
2
Limit
(Note 7)
4
Limits
(Note 7)
4
(Note 8)
10
Vos
Input Offset
Voltage
2
2
mV
(Max)
nA
Ib
Input Bias
Current
20
4
40
8
2
10
2
20
4
(Max)
nA
Ios
Input Offset
Current
0.5
70
0.2
100
(Max)
V/mV
(Min)
=
Avol
Voltage
RL 10k
40
30
50
40
Gain
to GND
V+ 30V
=
CMRR
PSRR
Common
Mode Rej.
Ratio
V+ 30V
=
90
90
80
80
75
75
90
90
80
80
75
75
dB
0V ≤ Vcm
(Min)
+
<
Vcm V − 1.5
V+ 5V to 30V
dB
=
Power
Supply Rej.
Ratio
(Min)
= ∞
Is
Supply
Current
Output
RL
85
150
3.4
250
85
150
3.4
250
µA
(Max)
V
Vo
IL 350 µA
3.6
V+−1.9V
3.6
V+−1.9V
=
Voltage
Swing
to GND.
(Min)
=
Vcm 0V
=
to V+
IL 350 µA
0.7
10
5
0.8
7
1.0
4
0.7
10
5
0.8
7
1.0
4
V
(Max)
=
Vcm 0V
=
Iout
Output
Vo 3V
mA
=
Source
Source
Current
Output
Vin (diff) 1V
(Min)
=
Iout
Vo 1.5V
4
3
4
3
mA
=
Sink
Sink
Vin (diff) 1V
(Min)
Current
Output
=
Iout
Vo 1.5V
4
2
1
4
2
1
mA
=
Sink
Sink
Vcm 0V
(Min)
Current
Output
=
Isource
Vin (diff) 1V
20
15
10
25
35
30
35
45
20
15
10
25
35
30
35
45
mA
Short to GND
Output
Short to V+
(Max)
mA
=
Vin (diff) 1V
Isink
(Max)
µV/C˚
Vos
www.national.com
2
Electrical Characteristics (Note 6) (Continued)
LP2902 (Note 9)
LP324
Tested
Symbol
Parameter
Conditions
Tested
Limit
Design
Limit
Design
Limit
Units
Typ
Typ
Limit
Limits
(Note 7)
(Note 8)
(Note 7)
(Note 8)
Drift
Ios
10
10
pA/C˚
Drift
GBW
Gain
Bandwidth
Product
100
50
100
50
KHz
Sr
Slew Rate
V/mS
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
−
Note 2: The input voltage is not allowed to go more than −0.3V below V (GND) as this will turn on a parasitic transistor causing large currents to flow through the
device.
Note 3: Short circuits from the output to GND can cause excessive heating and eventual destruction. The maximum sourcing output current is approximately 30 mA
+
independent of the magnitude of V . At values of supply voltage in excess of 15 V , continuous short-circuit to GND can exceed the power dissipation ratings (par-
DC
ticularly at elevated temperatures) and cause eventual destruction. Destructive dissipation can result from simultaneous shorts on all amplifiers.
=
Note 4: For operation at elevated temperatures, these devices must be derated based on a thermal resistance of θ and T max. T
ja
T + θ P .
A ja D
j
j
Note 5: The LP2902 may be operated from −40˚C ≤ T ≤ +85˚C, and the LP324 may be operated from 0˚C ≤ T ≤ +70˚C.
A
Note 6: Boldface numbers apply at temperature extremes. All other numbers apply only at T
unless otherwise specified.
A
+
=
=
=
=
=
L
T
25˚C, V
5V, V
cm
V/2, and R 100k connected to GND
A
j
Note 7: Guaranteed and 100% production tested.
Note 8: Guaranteed (but not 100% production tested) over the operating supply voltage range (3.0V to 32V for the LP324, LP324, and 3.0V to 26V for the LP2902),
+
and the common mode range (0V to V −1.5V), unless otherwise specified. These limits are not used to calculate outgoing quality levels.
Note 9: The LP2902 operating supply range is 3V to 26V, and is not tested above 26V.
Note 10: The test circuit used consists of the human body model of 100 pF in series with 1500Ω.
Typical Performance Curves
Input Voltage Range
Input Current
Supply Current
DS008562-21
DS008562-22
DS008562-23
Voltage Gain
Open Loop
Frequency Response
Power Supply
Rejection Ratio
DS008562-24
DS008562-25
DS008562-26
3
www.national.com
Typical Performance Curves (Continued)
Voltage Follower
Pulse Response
Voltage Follower Pulse
Response (Small Signal)
Common Mode
Rejection Ratio
DS008562-27
DS008562-28
DS008562-29
Large Signal
Frequency Response
Output Characteristics
Current Sourcing
Output Characteristics
Current Sinking
DS008562-30
DS008562-31
DS008562-32
Current Limiting
DS008562-33
Precautions should be taken to insure that the power supply
for the integrated circuit never becomes reversed in polarity
or the unit is not inadvertently installed backwards in the test
socket as an unlimited current surge through the resulting
forward diode within the IC could destroy the unit.
Application Hints
The LP324 series is a micro-power pin-for-pin equivalent to
the LM324 op amps. Power supply current, input bias cur-
rent, and input offset current have all been reduced by a fac-
tor of 10 over the LM324. Like its predecessor, the LP324 se-
ries op amps can operate on single supply, have
true-differential inputs, and remain in the linear mode with an
Large differential input voltages can be easily accommo-
dated and, as input differential voltage protection diodes are
not needed, no large input currents result from large differen-
tial input voltages. The differential input voltage may be
larger than V+ without damaging the device. Protection
should be provided to prevent the input voltages from going
negative more than −0.3 VDC (at 25˚C). An input clamp diode
with a resistor to the IC input terminal can be used.
input common-mode voltage of 0 VDC
.
The pinouts of the package have been designed to simplify
PC board layouts. Inverting inputs are adjacent to outputs for
all of the amplifiers and the outputs have also been placed at
the corners of the package (pins 1, 7, 8, and 14).
www.national.com
4
Exceeding the negative common-mode limit on either input
will cause a reversal of phase to the output and force the am-
plifier to the corresponding high or low state. Exceeding the
negative common-mode limit on both inputs will force the
amplifier output to a high state. Exceeding the positive
common-mode limit on a single input will not change the
phase of the output. However, if both inputs exceed the limit,
the output of the amplifier will be forced to a low state. In nei-
ther case does a latch occur since returning the input within
the common mode range puts the input stage and thus the
amplifier in a normal operating mode.
Application Hints (Continued)
The amplifiers have a class B output stage which allows the
amplifiers to both source and sink output currents. In appli-
cations where crossover distortion is undesirable, a resistor
should be used from the output of the amplifier to ground.
The resistor biases the output into class A operation.
The LP324 has improved stability margin for driving capaci-
tive loads. No special precautions are needed to drive loads
in the 50 pF to 1000 pF range. It should be noted however
that since the power supply current has been reduced by a
factor of 10, so also has the slew rate and gain bandwidth
product. This reduction can cause reduced performance in
AC applications where the LM324 is being replaced by an
LP324. Such situations usually occur when the LM324 has
been operated near its power bandwidth.
The circuits presented in the section on typical applications
emphasize operation on only a single power supply voltage.
If complementary power supplies are available, all of the
standard op amp circuits can be used. In general, introduc-
ing a pseudo-ground (a bias voltage reference to V+
allow operation above and below this value in single power
supply systems. Many application circuits are shown which
take advantage of the wide input common-mode voltage
range which includes ground. In most cases, input biasing is
not required and input voltages which range to ground can
easily be accommodated.
/2) will
Output short circuits either to ground or to the positive power
supply should be of short time duration. Units can be de-
stroyed, not as a result of the short circuit current causing
metal fusing, but rather due to the large increase in IC chip
dissipation which will cause eventual failure due to exces-
sive junction temperatures. For example: If all four amplifiers
were simultaneously shorted to ground on a 10V supply the
junction temperature would rise by 110˚C.
Driving CMOS
Comparator with Hysteresis
DS008562-3
DS008562-6
Non-Inverting Amplifier
Adder/Subtractor
DS008562-4
DS008562-7
Unity Gain Buffer
Positive Integrator
DS008562-5
DS008562-8
5
www.national.com
Application Hints (Continued)
Differential Integrator
Howland Current Pump
DS008562-9
DS008562-10
Bridge Current Amplifier
µ Power Current Source
DS008562-12
DS008562-11
Lowpass Filter
DS008562-13
www.national.com
6
Application Hints (Continued)
1 kHz Bandpass Active Filter
DS008562-14
Band-Reject Filter
DS008562-15
Pulse Generator
DS008562-16
7
www.national.com
Application Hints (Continued)
Window Comparator
DS008562-17
www.national.com
8
Physical Dimensions inches (millimeters) unless otherwise noted
S.O. Package (M)
Order Number LP324M or LP2902M
NS Package Number M14A
Dual-in-Line Package (N)
Order Number LP324N or LP2902N
NS Package Number N14A
9
www.national.com
Notes
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
National Semiconductor
Europe
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
Fax: +49 (0) 1 80-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
Email: sea.support@nsc.com
www.national.com
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
相关型号：
©2020 ICPDF网 联系我们和版权申明