LF298

更新时间： 2024-11-21 23:15:15

品牌	Logo	应用领域
恩智浦 - NXP		放大器
页数	文件大小	规格书
5页	133K
描述
Sample-and-hold amplifiers

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LF298 数据手册

Philips Semiconductors Linear Products

Product specification

Sample-and-hold amplifiers

LF198/LF298/LF398

DESCRIPTION

PIN CONFIGURATIONS

The LF198/LF298/LF398 are monolithic sample-and-hold circuits

which utilize high-voltage ion-implant JFET technology to obtain

ultra-high DC accuracy with fast acquisition of signal and low droop

rate. Operating as a unity gain follower, DC gain accuracy is 0.002%

typical and acquisition time is as low as 6µs to 0.01%. A bipolar

input stage is used to achieve low offset voltage and wide

bandwidth. Input offset adjust is accomplished with a single pin and

does not degrade input offset drift. The wide bandwidth allows the

LF198 to be included inside the feedback loop of 1MHz op amps

FE, N Packages

V+

OFFSET VOLTAGE

INPUT

LOGIC

LOGIC REFERENCE

OUTPUT

V–

without having stability problems. Input impedance of 10 Ω allows

high source impedances to be used without degrading accuracy.

TOP VIEW

P-channel junction FETs are combined with bipolar devices in the

output amplifier to give droop rates as low as 5mV/min with a 1µF

hold capacitor. The JFETs have much lower noise than MOS

devices used in previous designs and do not exhibit high

temperature instabilities. The overall design guarantees no

feedthrough from input to output in the hold mode even for input

signals equal to the supply voltages.

D Package

INPUT

Adj

V+

V–

LOGIC

LOGIC REF

Logic inputs are fully differential with low input current, allowing

direct connection to TTL, PMOS, and CMOS; differential threshold is

1.4V. The LF198/LF298/LF398 will operate from ±5V to ±18V

supplies. They are available in 8-pin plastic DIP, 8-pin Cerdip, and

14-pin plastic SO packages.

OUTPUT

TOP VIEW

FEATURES

NOTE:

1. SO and non-standard pinouts.

• Operates from ±5V to ±18V supplies

• Less than 10µs acquisition time

• TTL, PMOS, CMOS compatible logic input

• 0.5mV typical hold step at CH=0.01µF

• Low input offset

APPLICATION

• The LF198/LF298/LF398 are ideally suited for a wide variety of

sample-and-hold applications, including data acquisition,

analog-to-digital conversion, synchronous demodulation, and

automatic test setup

• 0.002% gain accuracy

• Low output noise in hold mode

• Input characteristics do not change during hold mode

• High supply rejection ratio in sample or hold

• Wide bandwidth

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

-55°C to +125°C

0 to +70°C

ORDER CODE

LF198FE

LF398D

DWG #

0580A

0175D

0580A

0404B

0580A

0404B

8-Pin Ceramic Dual In-Line Package (CERDIP)

14-Pin Plastic Small Outline (SO) Package

8-Pin Ceramic Dual In-Line Package (CERDIP)

8-Pin Plastic Dual In-Line Package (DIP)

8-Pin Ceramic Dual In-Line Package (CERDIP)

8-Pin Plastic Dual In-Line Package (DIP)

0 to +70°C

LF398FE

LF398N

0 to +70°C

-25°C to +85°C

LF298FE

LF298N

879

August 31, 1994

853-0135 13721

12 3 4 5

中文翻译

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与LF298相关器件

型号	品牌	获取价格	描述	数据表
LF298FE	NXP	获取价格	Sample-and-hold amplifiers
LF298H	NSC	获取价格	Monolithic Sample-and-Hold Circuits
LF298HB	ETC	获取价格	Sample/Track-and-Hold Amplifier
LF298M	NSC	获取价格	Monolithic Sample-and-Hold Circuits
LF298M	TI	获取价格	Monolithic Sample-and-Hold Circuits
LF298M/NOPB	NSC	获取价格	IC SAMPLE AND HOLD AMPLIFIER, 20 us ACQUISITION TIME, PDSO14, ROHS COMPLIANT, SOIC-14, Sam
LF298M/NOPB	TI	获取价格	Monolithic Sample-and-Hold Circuits
LF298MX	TI	获取价格	Monolithic Sample-and-Hold Circuits
LF298MX	NSC	获取价格	IC SAMPLE AND HOLD AMPLIFIER, 20 us ACQUISITION TIME, PDSO14, SOIC-14, Sample and Hold Cir
LF298MX/NOPB	NSC	获取价格	IC SAMPLE AND HOLD AMPLIFIER, 20 us ACQUISITION TIME, PDSO14, ROHS COMPLIANT, SOIC-14, Sam

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