LF412MH现货热卖使用介绍供应商报价哪里找芯片批发报价-中国IC网-芯三七

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产品型号LF412MH的概述

LF412MH芯片概述 LF412MH是一款双运算放大器（Operational Amplifier），广泛应用于音频、信号处理、传感器和高精度测量等多个领域。该芯片因其低噪声和高增益特性，使其成为了开发精密模拟电路的理想选择。LF412MH特别适合于要求高增益带宽、低失真和高输入阻抗的应用场合。 LF412系列运算放大器以其优异的性能特征和相对较低的成品价格，获得了市场的广泛认可。LF412MH的工作范围广，适合多种电源配置，因此在设计现代电子系统时，它常作为核心元件之一。该芯片不仅支持双极性电源供电，还能够在单电源供电中正常工作，这为电源设计带来了更多的灵活性。 LF412MH详细参数 LF412MH的主要技术参数包括： - 增益带宽积：通常为3MHz，提供足够的频率响应以满足多种应用需求。 - 输入电压噪声：典型值为15nV/√Hz，使其在高精度测量中表现优异。 - 输入阻抗：高...

产品型号LF412MH的Datasheet PDF文件预览

August 2000

LF412

Low Offset, Low Drift Dual JFET Input Operational

Amplifier

General Description

Features

n Internally trimmed offset voltage: 1 mV (max)

n Input offset voltage drift: 10 µV/˚C (max)

n Low input bias current: 50 pA

These devices are low cost, high speed, JFET input opera-

tional amplifiers with very low input offset voltage and guar-

anteed input offset voltage drift. They require low supply

current yet maintain a large gain bandwidth product and fast

slew rate. In addition, well matched high voltage JFET input

devices provide very low input bias and offset currents. The

LF412 dual is pin compatible with the LM1558, allowing

designers to immediately upgrade the overall performance of

existing designs.

n Low input noise current:

n Wide gain bandwidth: 3 MHz (min)

n High slew rate: 10V/µs (min)

n Low supply current: 1.8 mA/Amplifier

n High input impedance: 10¹²

n Low total harmonic distortion ≤0.02%

n Low 1/f noise corner: 50 Hz

n Fast settling time to 0.01%: 2 µs

Ω

These amplifiers 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 and drift, low input bias current, high input imped-

ance, high slew rate and wide bandwidth.

Typical Connection

Connection Diagrams

Metal Can Package

00565642

Order Number LF412MH, LF412CH

or LF412MH/883 (Note 1)

00565641

See NS Package Number H08A

Ordering Information

LF412XYZ

Dual-In-Line Package

X indicates electrical grade

Y indicates temperature range

“M” for military

“C” for commercial

Z indicates package type

“H” or “N”

00565644

Order Number LF412ACN, LF412CN

or LF412MJ/883 (Note 1)

See NS Package Number J08A or N08E

™

BI-FET II is a trademark of National Semiconductor Corporation.

DS005656

www.national.com

Simplified Schematic

1/2 Dual

00565643

Note 1: Available per JM38510/11905

Detailed Schematic

00565632

www.national.com

Absolute Maximum Ratings (Note 2)

H Package

(Note 5)

150˚C

N Package

670 mW

115˚C

(Note 12)

T_jmax

θ_jA(Typical)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

152˚C/W

115˚C/W

(Note 6)

(Note 11)

Operating Temp. Range (Note 6)

LF412A

22V

LF412

18V

Storage Temp.

Range

−65˚C≤T_A≤150˚C −65˚C≤T_A≤150˚C

Supply Voltage

Differential Input Voltage

Input voltage Range

(Note 3)

38V

30V

Lead Temp.

(Soldering, 10 sec.)

ESD Tolerance

(Note 13)

260˚C

1700V

260˚C

1700V

19V

15V

Output Short Circuit

Duration (Note 4)

Continuous Continuous

H Package N Package

Power Dissipation

DC Electrical Characteristics

(Note 7)

Symbol

Parameter

Conditions

LF412A

LF412

Typ

1.0

Units

Min

Typ

0.5

Max Min

Max

3.0

V_OS

Input Offset Voltage

R_S=10 kΩ, T_A=25˚C

1.0

∆V_OS/∆T Average TC of Input

R_S=10 kΩ (Note 8)

µV/˚C

Offset Voltage

I_OS

Input Offset Current

V_S= 15V

T_j=25˚C

T_j=70˚C

T_j=125˚C

T_j=25˚C

T_j=70˚C

T_j=125˚C

100

(Notes 7, 9)

200

I_B

Input Bias Current

V_S= 15V

(Notes 7, 9)

R_IN

Input Resistance

Large Signal Voltage

Gain

T_j=25˚C

10¹²

200

10¹²

200

Ω

A_VOL

V_S= 15V, V_O= 10V,

R_L=2k, T_A=25˚C

Over Temperature

V_S= 15V, R_L=10k

V/mV

200

13.5

200

13.5

V/mV

V_O

Output Voltage Swing

Input Common-Mode

Voltage Range

V_CM

+19.5

−16.5

100

+14.5

−11.5

100

CMRR

PSRR

I_S

Common-Mode

Rejection Ratio

Supply Voltage

R_S≤10k

(Note 10)

100

Rejection Ratio

Supply Current

∞

V_O= 0V, R_L

3.6

5.6

3.6

6.5

Note 2: “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.

AC Electrical Characteristics

(Note 7)

Symbol

Parameter

Conditions

LF412A

Typ

LF412

Typ

Units

Min

Max

Min

Max

Amplifier to Amplifier

Coupling

T_A=25˚C, f=1 Hz-20 kHz

(Input Referred)

−120

GBW

Slew Rate

V_S= 15V, T_A=25˚C

V/µs

MHz

Gain-Bandwidth Product

2.7

www.national.com

AC Electrical Characteristics (Continued)

(Note 7)

Symbol

Parameter

Conditions

LF412A

Typ

LF412

Typ

Units

Min

Max

Min

Max

THD

Total Harmonic Dist

A_V=+10, R_L=10k,

V_O=20 Vp-p,

≤0.02

BW=20 Hz-20 kHz

T_A=25˚C, R_S=100Ω,

f=1 kHz

e_n

i_n

Equivalent Input Noise

Voltage

Equivalent Input Noise

Current

T_A=25˚C, f=1 kHz

0.01

Note 3: Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage.

Note 4: Any of the amplifier outputs can be shorted to ground indefintely, however, more than one should not be simultaneously shorted as the maximum junction

temperature will be exceeded.

Note 5: For operating at elevated temperature, these devices must be derated based on a thermal resistance of θ

Note 6: These devices are available in both the commercial temperature range 0˚C≤T ≤70˚C and the military temperature range −55˚C≤T ≤125˚C. The

temperature range is designated by the position just before the package type in the device number. A “C” indicates the commercial temperature range and an “M”

indicates the military temperature range. The military temperature range is available in “H” package only. In all cases the maximum operating temperature is limited

by internal junction temperature T max.

Note 7: Unless otherwise specified, the specifications apply over the full temperature range and for V = 20V for the LF412A and for V = 15V for the LF412. V ,

I , and I

are measured at V =0.

Note 8: The LF412A is 100% tested to this specification. The LF412 is sample tested on a per amplifier basis to insure at least 85% of the amplifiers meet this

specification.

Note 9: The input bias currents are junction leakage currents which approximately double for every 10˚C increase in the junction temperature, T . Due to limited

production test time, the input bias currents measured are correlated to junction temperature. In normal operation the junction temperature rises above the ambient

temperature as a result of internal power dissipation, P . T =T +θ

where θ is the thermal resistance from junction to ambient. Use of a heat sink is

D jA

recommended if input bias current is to be kept to a minimum.

Note 10: Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with common practice. V

6V to 15V.

Note 11: Refer to RETS412X for LF412MH and LF412MJ military specifications.

Note 12: 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.

Note 13: Human body model, 1.5 kΩ in series with 100 pF.

Typical Performance Characteristics

Input Bias Current

00565610

00565611

www.national.com

Typical Performance Characteristics (Continued)

Positive Common-Mode

Input Voltage Limit

Supply Current

00565612

00565613

Negative Common-Mode

Input Voltage Limit

Positive Current Limit

00565615

00565614

Negative Current Limit

Output Voltage Swing

00565616

00565617

www.national.com

Typical Performance Characteristics (Continued)

Output Voltage Swing

Gain Bandwidth

00565619

00565618

Bode Plot

Slew Rate

00565621

00565620

Undistorted Output Voltage

Swing

Distortion vs Frequency

00565622

00565623

www.national.com

Typical Performance Characteristics (Continued)

Open Loop Frequency

Response

Common-Mode Rejection

Ratio

00565625

00565624

Power Supply Rejection

Ratio

Equivalent Input Noise

Voltage

00565626

00565627

Open Loop Voltage Gain

Output Impedance

00565628

00565629

www.national.com

Typical Performance Characteristics (Continued)

Inverter Settling Time

00565630

Pulse Response R_L=2 kΩ, C_L=10 pF

Small Signal Inverting

Small Signal Non-Inverting

00565636

00565637

Large Signal Inverting

Large Signal Non-Inverting

00565638

00565639

www.national.com

Pulse Response R_L=2 kΩ, C_L=10 pF (Continued)

Current Limit (R_L=100Ω)

00565640

The amplifiers will drive a 2 kΩ load resistance to 10V over

the full temperature range. If the amplifier is forced to drive

heavier load currents, however, an increase in input offset

voltage may occur on the negative voltage swing and finally

reach an active current limit on both positive and negative

swings.

Application Hints

The LF412 series of JFET input dual op amps are internally

™

trimmed (BI-FET II ) providing very low input offset voltages

and guaranteed input offset voltage drift. 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 destroyed

unit.

Precautions should be taken to ensure that the power supply

for the integrated circuit never becomes reversed in polarity

or that the unit is not inadvertently installed backwards in a

socket as an unlimited current surge through the resulting

forward diode within the IC could cause fusing of the internal

conductors and result in a destroyed unit.

As with most amplifiers, care should be taken with lead

dress, component placement and supply decoupling in order

to ensure stability. For example, resistors from the output to

an input should be placed with the body close to the input to

minimize “pick-up” and maximize the frequency of the feed-

back pole by minimizing the capacitance from the input to

ground.

Exceeding the negative common-mode limit on either input

will cause a reversal of the phase to the output and force the

amplifier output 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. In neither case

does a latch occur since raising the input back within the

common-mode range again puts the input stage and thus

the amplifier in a normal operating mode.

A feedback pole is created when the feedback around any

amplifier is resistive. The parallel resistance and capacitance

from the input of the device (usually the inverting input) 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 gain and consequently

there is negligible effect on stability margin. However, if the

feedback pole is less than approximately 6 times the ex-

pected 3 dB frequency a lead capacitor should be placed

from the output to the input of the op amp. The value of the

added capacitor should be such that the RC time constant of

this capacitor and the resistance it parallels is greater than or

equal to the original feedback pole time constant.

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 may be

forced to a high state.

The amplifiers 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.

Each amplifier is individually biased by a zener reference

which allows normal circuit operation on 6.0V power sup-

plies. Supply voltages less than these may result in lower

gain bandwidth and slew rate.

www.national.com

Typical Application

Single Supply Sample and Hold

00565631

www.national.com

Physical Dimensions inches (millimeters)

unless otherwise noted

Metal Can Package (H)

Order Number LF412MH, LF412MH/883 or LF412CH

NS Package Number H08A

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

Dual-In-Line Package (J)

Order Number LF412MJ/883

NS Package Number J08A

Dual-In-Line Package (N)

Order Number LF412ACN or LF412CN

NS Package Number N08E

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.

BANNED SUBSTANCE COMPLIANCE

National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products

Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification

(CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2.

National Semiconductor

Americas Customer

Support Center

National Semiconductor

Europe Customer Support Center

Fax: +49 (0) 180-530 85 86

National Semiconductor

Asia Pacific Customer

Support Center

National Semiconductor

Japan Customer Support Center

Fax: 81-3-5639-7507

Email: new.feedback@nsc.com

Tel: 1-800-272-9959

Email: europe.support@nsc.com

Deutsch Tel: +49 (0) 69 9508 6208

English Tel: +44 (0) 870 24 0 2171

Français Tel: +33 (0) 1 41 91 8790

Email: ap.support@nsc.com

Email: jpn.feedback@nsc.com

Tel: 81-3-5639-7560

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.

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LF412MH产品参数

型号:	LF412MH
Brand Name：	Texas Instruments
生命周期：	Active
IHS 制造商：	TEXAS INSTRUMENTS INC
零件包装代码：	TO-8
包装说明：	TO-99, CAN8,.2
针数：	8
Reach Compliance Code：	not_compliant
ECCN代码：	EAR99
HTS代码：	8542.33.00.01
Factory Lead Time：	1 week
风险等级：	1.63
放大器类型：	OPERATIONAL AMPLIFIER
架构：	VOLTAGE-FEEDBACK
最大平均偏置电流 (IIB)：	0.0002 µA
25C 时的最大偏置电流 (IIB)：	0.0002 µA
最小共模抑制比：	70 dB
标称共模抑制比：	100 dB
频率补偿：	YES
最大输入失调电流 (IIO)：	0.0001 µA
最大输入失调电压：	3000 µV
JESD-30 代码：	O-MBCY-W8
低-偏置：	YES
低-失调：	NO
微功率：	NO
湿度敏感等级：	1
负供电电压上限：	-18 V
标称负供电电压 (Vsup)：	-15 V
功能数量：	2
端子数量：	8
最高工作温度：	125 °C
最低工作温度：	-55 °C
封装主体材料：	METAL
封装代码：	TO-99
封装等效代码：	CAN8,.2
封装形状：	ROUND
封装形式：	CYLINDRICAL
峰值回流温度（摄氏度）：	NOT SPECIFIED
功率：	NO
电源：	+-15 V
可编程功率：	NO
认证状态：	Not Qualified
筛选级别：	MIL-STD-883
最小摆率：	8 V/us
标称压摆率：	15 V/us
子类别：	Operational Amplifier
最大压摆率：	6.5 mA
供电电压上限：	18 V
标称供电电压 (Vsup)：	15 V
表面贴装：	NO
技术：	BIPOLAR
温度等级：	MILITARY
端子形式：	WIRE
端子位置：	BOTTOM
处于峰值回流温度下的最长时间：	NOT SPECIFIED
标称均一增益带宽：	4000 kHz
最小电压增益：	15000
宽带：	NO
Base Number Matches：	1

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产品型号LF412MH的概述

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