Shenzhen Perry Electronic Company Limited
Main products:IC,Transistor,Diode,Capacitor,Bridge Rectifier
Contact Us
  • Contact Person : Ms. lin Esse
  • Company Name : Shenzhen Perry Electronic Company Limited
  • Tel : 86-755-83238897,82560819
  • Fax : 86-755-82560819
  • Address : Guangdong,Shenzhen,Futian District, Shenzhen City, New Asia Guoli Building 2523 and 2527
  • Country/Region : China
  • Zip : 518031

LF398 Monolithic Sample-and-Hold Circuits

LF398 Monolithic Sample-and-Hold Circuits
Product Detailed
LF398 1>global presence 2>fast delivery 3>sample offering 4>long-term supply






Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Standard Package



Integrated Circuits (ICs)


Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Amplifier Type

Sample and Hold

Number of Circuits


Current - Input Bias


Voltage - Input Offset


Current - Supply


Voltage - Supply, Single/Dual (±)

±5 V ~ 18 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

8-DIP (0.300", 7.62mm)

Supplier Device Package




General Description

The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize BI-FET 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 6 µs 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 inide the feedback loop of 1 MHz op amps without having stability problems. Input impedance of 10 10Ω allows high source impedances to be used without degrading accuracy. P-channel junction FET’s are combined with bipolar devices in the output amplifier to give droop rates as low as 5 mV/min witha1µF hold capacitor. The JFET’s have much lower noise than MOS devices used in previous designs and do not exhibit high temperature instabilities. The overall design guarantees no feed-through from input to output in the hold mode, even for input signals equal to the supply voltages.


> Operates from ± 5V to ± 18V supplies

> Less than 10 µs acquisition time

> TTL, PMOS, CMOS compatible logic input

> 0.5 mV typical hold step at Ch= 0.01 µF

> Low input offset

> 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

> Space qualified, JM38510 Logic inputs on the LF198 are fully differential with low input current, allowing direct connection to TTL, PMOS, and CMOS. Differential threshold is 1.4V. The LF198 will operate from ± 5V to ± 18V supplies. An “A” version is available with tightened electrical specifications.




All products had been strictly tested before shipping. All photos displayed are 100% real and for reference only. It's possible that existing slight differences due to technical improvement and variance. Your order is recognized as you are with full acknowledgement of product specs and respective policies . Our customer service is ready to help you at anytime . Aiming to create a pleasant shopping experience for you, we are committed to providing top quality and great service all the time.


Customer is responsible for paying shipping fees and can select from these methods:1. Paid by supplier.2. Paid by buyer. You should provide us customer's shipper account number(such like TNT/ UPS/DHL...).

Don't worry about the packaging because of its safe and strong external packing.

1> Express: DHL, UPS, FedEx, EMS and TNT

    Estimated time of arrival: 3-5 days. But it isn't a unified standard that depends on the country of destination. If  you have any special needs please notify us beforehand.

2> Post: Hong Kong POST, China POST.

     10-15 days to Asian neighbors;     12-18 days to major countries in Europe and America;     12-35 days to other regions and countries.

Product Type & Condition:

Because of the fluctuant sales situation, the stock parts are always changing and the stock list hasn’t been promptly updated. So, please consult the stock situation when you inquire.


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 You can contact us freely if there have any other questions.

LF398 Monolithic Sample-and-Hold Circuits

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