TL081-N [TI]
TL081 Wide Bandwidth JFET Input Operational Amplifier; TL081宽带宽JFET输入运算放大器
| 型号： | TL081-N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | TL081 Wide Bandwidth JFET Input Operational Amplifier |
| 文件： | 总10页 (文件大小：484K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL081
TL081 Wide Bandwidth JFET Input Operational Amplifier
Literature Number: SNOSBW6A
December 1995
TL081 Wide Bandwidth JFET
Input Operational Amplifier
are critical, the LF356 is recommended. If maximum supply
current is important, however, the TL081C is the better
choice.
General Description
The TL081 is a low cost high speed JFET input operational
amplifier with an internally trimmed input offset voltage
(BI-FET IITM technology). The device requires a low supply
current and yet maintains a large gain bandwidth product
and a fast slew rate. In addition, well matched high voltage
JFET input devices provide very low input bias and offset
currents. The TL081 is pin compatible with the standard
LM741 and uses the same offset voltage adjustment circuit-
ry. This feature allows designers to immediately upgrade the
overall performance of existing LM741 designs.
Features
Y
Internally trimmed offset voltage
Low input bias current
Low input noise voltage
Low input noise current
Wide gain bandwidth
High slew rate
15 mV
50 pA
Y
Y
Y
Y
Y
Y
Y
Y
25 nV/ Hz
0
MHz
pA/ Hz
0
13 Vs
The TL081 may be used in applications such as high speed
integrators, fast D/A converters, sample-and-hold circuits
and many other circuits requiring low input offset voltage,
low input bias current, high input impedance, high slew rate
and wide bandwidth. The devices has low noise and offset
voltage drift, but for applications where these requirements
Low supply current
1.8 A
High input impedance
10 X
e
Low total harmonic distortioA
e
10,
.02%
e
R
BW
10k, V
20 Hz 20 kH
20 Vp-p,
L
O
b
e
Y
Y
Low 1/f noise cor
50 Hz
Fast ettling time
2 ms
Typical Connection
Simplifd Scmatic
358–1
Connecti
TL/H/8358–2
Dual-In-Line Package
TL/H/8358–4
Order Number TL081CP
See NS Package Number N08E
BI-FET IITM is a trademark of National Semiconductor Corp.
C
1995 National Semiconductor Corporation
TL/H/8358
RRD-B30M125/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.
g
Input Voltage Range (Note 2)
Output Short Circuit Duration
Storage Temperature Range
Lead Temp. (Soldering, 10 seconds)
15V
Continuous
b
a
65 C to 150 C
§
§
g
Supply Voltage
18V
260 C
§
120 C/W
Power Dissipation (Notes 1 and 6)
Operating Temperature Range
670 mW
i
§
jA
a
0 C to 70 C
§
§
ESD rating to be determined.
T
115 C
§
30V
j(MAX)
g
Differential Input Voltage
DC Electrical Characteristics (Note 3)
TL081C
Symbol
Parameter
Conditions
Units
Min
Typ
Max
e
Over Temperature
e
25 C
V
OS
Input Offset Voltage
R
10 kX, T
A
5
15
20
mV
mV
§
S
e
10 kX
DV /DT
OS
Average TC of Input Offset
Voltage
R
S
10
2
V/ C
§
e
j
I
Input Offset Current
T
25 C, (Notes 3, 4)
§
10
4
pA
OS
s
T
j
70 C
§
e
s
I
Input Bias Current
T
T
25 C, (Notes 3, 4)
§
70 C
§
50
00
pA
nA
B
j
j
e
R
IN
Input Resistance
T
j
25 C
§
X
e
e
e
e
g
g
A
Large Signal Voltage Gain
V
V
15V, T
25 C
§
25
5
100
V/mV
VOL
S
A
10V, R
2 kX
O
L
Over Temperature
V/mV
V
e
e
s
e
1
g
g
g
g
13.5
V
V
Output Voltage Swing
V
15V, R
1
11
O
S
S
L
a
b
Input Common-Mode Voltage
Range
15
12
V
V
CM
V
15V
CMRR
PSRR
Common-Mode Rejection Ratio
Supply Voltage Rejection Ratio
Supply Current
R
10 kX
0
70
100
100
1.8
dB
dB
S
(Not5)
I
2.8
mA
S
AC Electrical Charactestic
TL081C
Typ
13
Symbol
Parameter
onditions
Units
Min
Max
e
e
e
e
g
g
SR
Slew R
V
T
15V, T
15V, T
25 C
§
V/ms
S
A
e
GBW
Gain
25 C
§
4
MHz
S
A
e
100X,
e
n
Equiv
25 C, R
§
A
S
25
nV/ Hz
0
e
f
1000 Hz
e
e
1000 Hz
i
n
Equivalent rent
T
j
25 C, f
0.01
pA/ Hz
0
§
Note 1: For operating at elevated temperature, the device must be derated based on a thermal resistance of 120 C/W junction to ambient for N package.
§
Note 2: Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage.
s
s
a
e
e
0.
CM
g
Note 3: These specifications apply for V
15V and 0 C
§
T
70 C. V , I and I
§
are measured at V
S
A
OS
B
OS
Note 4: The input bias currents are junction leakage currents which approximately double for every 10 C increase in the junction temperature, T . Due to the limited
§
production test time, the input bias currents measured are correlated to junction temperature. In normal operation the junction temperature rises above the ambient
j
e
recommended if input bias current is to be kept to a minimum.
a
i
temperature as a result of internal power dissipation, P . T
D
T
A
P where i is the thermal resistance from junction to ambient. Use of a heat sink is
D jA
j
jA
Note 5: Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with common practice from
e
g
g
5V to 15V.
V
S
Note 6: Max. Power Dissipation is defined by the package characteristics. Operating the part near the Max. Power Dissipation may cause the part to operate
outside guaranteed limits.
2
Typical Performance Characteristics
Input Bias Current
Input Bias Current
Supply Current
Positive Common-Mode Input
Voltage Limit
Negative Common-Mode Input
Voltage Limit
Positivimit
Output Voltage Swing
Slew Rate
Voltage
Negative Current Limit
G
Bode Plot
TL/H/8358–5
3
Typical Performance Characteristics (Continued)
Undistorted Output Voltage
Swing
Open Loop Frequency
Response
Distortion vs Frequency
TL/H/8358–6
4
Pulse Response
Small Signal Inverting
Small Signal Non-Inverting
TL/H/8358–7
TL/H/8358–13
Large Signal Inverting
Large Signal Non-Invertin
TL/H/8358–14
TL/H/8358–15
Current Limit (R
L
TL/H/8358–16
Applicati
The TL081 is an n internally trimmed input
offset voltage and JFut devices (BI-FET II). These
JFETs have large reverse breakdown voltages from gate to
source and drain eliminating the need for clamps across the
inputs. Therefore, large differential input voltages can easily
be accommodated without a large increase in input current.
The maximum differential input voltage is independent of
the supply voltages. However, neither of the input voltages
should be allowed to exceed the negative supply as this
will cause large currents to flow which can result in a de-
stroyed unit.
Exceeding the negative common-mode limit on either input
will force the output to a high state, potentially causing a
reversal of phase to the output.
Exceeding the negative common-mode limit on both inputs
will force the amplifier output to a high state. In neither case
does a latch occur since raising the input back within the
5
Application Hints (Continued)
common-mode range again puts the input stage and thus
the amplifier in a normal operating mode.
resulting forward diode within the IC could cause fusing of
the internal conductors and result in a destroyed unit.
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 high state.
Because these amplifiers are JFET rather than MOSFET
input op amps they do not require special handling.
As with most amplifiers, care should be taken with lead
dress, component placement and supply decoupling in or-
der to ensure stability. For example, resistors from the out-
put to an input should be placed with the body close to the
input to minimize ‘‘pick-up’’ and maximize the frequency of
the feedback pole by minimizing the capacitance from the
input to ground.
The amplifier will operate with a common-mode input volt-
age equal to the positive supply; however, the gain band-
width and slew rate may be decreased in this condition.
When the negative common-mode voltage swings to within
3V of the negative supply, an increase in input offset voltage
may occur.
A feedback pole is created when the feedback around any
amplifier is resistive. The parallel resistance and capaci-
tance from the input of the device (usually the inverting in-
put) to AC ground set the frequency of the pole. In many
instances the frequency of this pole is much greater than
the expected 3 dB frequency of the closed loop in and
consequently there is negligible effect on sn.
However, if the feedback pole is less than ly 6
times the expected 3 dB frequency a lead should
be placed from the output to thnpof thamp. The
value of the added capacitor shobe such at the R
time constant of this capacitor and the sistance ilels
is greater than or equal to the original dback pole time
constant.
The TL081 is biased by a zener reference which allows nor-
g
mal circuit operation on 4V power supplies. Supply volt-
ages less than these may result in lower gain bandwidth and
slew rate.
g
The TL081 will drive a 2 kX load resistance to 10V over
a
the full temperature range of 0 C to 70 C. If the amplifier
§
§
is forced to drive heavier load currents, however, an in-
crease in input offset voltage may occur on the negative
voltage swing and finally reach an active current limit on
both positive and negative swings.
Precautions should be taken to ensure that the power sup-
ply for the integrated circuit never becomes reversed in po-
larity or that the unit is not inadvertently installed backwards
in
a socket as an unlimited current surge through the
Detailed Schematic
TL/H/8358–8
6
Typical Applications
Supply Current Indicator/Limiter
Hi-Z Inverting Amplifier
IN
TL/H/8358–9
l
V
D
TL/H/8358–10
(3 ps any additional
V
switches high when R
I
S S
#
OUT
j
layout capacitance) interacts with feets and eates un-
Parasitic input capacitance C1
desirable high frequenpole. To co, add C2 ch that:
j
R2C2
R1C1.
Ultra-Low (or High) Duty Cycle Pulse
Generator
Ltegrator
TL/H/
t
#
#
OUTP
OUTPU
TL/H/8358–12
* Low leakage capacitor
t
50k pot used for less sensitive V
adjust
OS
#
where V
S
*low leakage c
7
Physical Dimensions inches (millimeters)
Molded Dual-In-Line Package )
Order Number TL081CP
NS Package Number N08E
LIFE SUPPORT
NATIONAL’S AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCAs used herein:
1. Life support ms are devices or
systems which, (ed 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
National Semiconductor
Europe
National Semiconductor
Hong Kong Ltd.
National Semiconductor
Japan Ltd.
a
1111 West Bardin Road
Arlington, TX 76017
Tel: 1(800) 272-9959
Fax: 1(800) 737-7018
Fax:
(
49) 0-180-530 85 86
@
13th Floor, Straight Block,
Ocean Centre, 5 Canton Rd.
Tsimshatsui, Kowloon
Hong Kong
Tel: (852) 2737-1600
Fax: (852) 2736-9960
Tel: 81-043-299-2309
Fax: 81-043-299-2408
Email: cnjwge tevm2.nsc.com
a
a
a
a
Deutsch Tel:
English Tel:
Fran3ais Tel:
Italiano Tel:
(
(
(
(
49) 0-180-530 85 85
49) 0-180-532 78 32
49) 0-180-532 93 58
49) 0-180-534 16 80
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.
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Audio
Applications
www.ti.com/audio
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
Communications and Telecom www.ti.com/communications
Amplifiers
Data Converters
DLP® Products
DSP
Computers and Peripherals
Consumer Electronics
Energy and Lighting
Industrial
www.ti.com/computers
www.ti.com/consumer-apps
www.ti.com/energy
dsp.ti.com
www.ti.com/industrial
www.ti.com/medical
www.ti.com/security
Clocks and Timers
Interface
www.ti.com/clocks
interface.ti.com
logic.ti.com
Medical
Security
Logic
Space, Avionics and Defense www.ti.com/space-avionics-defense
Transportation and Automotive www.ti.com/automotive
Power Mgmt
Microcontrollers
RFID
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
Video and Imaging
www.ti.com/video
OMAP Mobile Processors www.ti.com/omap
Wireless Connectivity www.ti.com/wirelessconnectivity
TI E2E Community Home Page
e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2011, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明