LF198 - LF198是Precision Sample and Hold Amplifier

LF198是LINEAR凌力尔特公司的一款合乎航天使用要求的放大器产品，LF198是LF198是Precision Sample and Hold Amplifier，本站介绍了LF198的封装应用图解、特点和优点、功能等，并给出了与LF198相关的LINEAR元器件型号供参考。

LF198 - LF198是Precision Sample and Hold Amplifier - 合乎航天使用要求的放大器 - 航天和严酷环境 - 凌力尔特

LF198 - Precision Sample and Hold Amplifier

LF198 - Precision Sample and Hold Amplifier - Linear Technology（凌力尔特）

功能描述

OBSOLETE PRODUCT Data Sheet For Reference Only

The LF198 is a precision sample and hold amplifier which uses a combination of bipolar and junction FET transistors to provide precision, high speed, and long hold times. A typical offset voltage of 1mV and gain error of 0.002% allow this sample and hold amplifier to be used in 12-bit systems. Dynamic performance can be optimized by proper selection of the external hold capacitor. Acquisition times can be as low as 4µs for small capacitors while hold step and droop errors can be held below 0.1mV and 30µV/sec respectively when using larger capacitors. The LF198 is fixed at unity gain with 1010 ohms input impedance independent of sample/hold mode. The logic inputs are high impedance differential to allow easy interfacing to any logic family without ground loop problems. A separate offset adjust pin can be used to zero the offset voltage in either the sample or hold mode. Additionally, the hold capacitor can be driven with an external signal to provide precision level shifting or "differencing" operation. The device will operate over a wide supply voltage range from ±5V to ±18V with very little change in performance, and key parameters are specified over this full supply range. The LF198A version offers tightened electrical specifications for key parameters.

特点

Guaranteed 6µs Max. Acquisition Time

Guaranteed 0.005% Max. Gain Error

Guaranteed 1mV Max. Offset Voltage

Guaranteed 1mV Max. Hold Step

Very Low Feedthrough 86dB Min.

High Input Impedance under All Conditions

Logic Inputs Compatible with All Logic Families

应用

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

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