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LF198JAN-SP数据手册TI中文资料规格书

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厂商型号

LF198JAN-SP

功能描述

单片采样保持电路

制造商

TI Texas Instruments

中文名称

德州仪器 美国德州仪器公司

数据手册

下载地址下载地址二

更新时间

2025-8-6 16:55:00

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LF198JAN-SP规格书详情

描述 Description

The LF198 is a monolithic sample-and-hold circuit which utilizes 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 inside the feedback loop of 1 MHz op amps without having stability problems. Input impedance of 1010Ω 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 with a 1 μF 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 ensures no feed-through from input to output in the hold mode, even for input signals equal to the supply voltages.

特性 Features

• 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 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.

供应商 型号 品牌 批号 封装 库存 备注 价格
NS/国半
23+
NA
13000
原厂授权一级代理,专业海外优势订货,价格优势、品种
询价
NS
CAN
8650
一级代理 原装正品假一罚十价格优势长期供货
询价
5
全新原装 货期两周
询价
NS
24+
CAN
500
询价
ST
23+24
TO-252
59630
主营原装MOS,二三级管,肖特基,功率场效应管
询价
TEXAS INSTRUMENTS
2022+
原厂原包装
8600
全新原装 支持表配单 中国著名电子元器件独立分销
询价
TI德州仪器
22+
24000
原装正品现货,实单可谈,量大价优
询价
VISHAY/威世
2022+
DIP
248000
原厂代理 终端免费提供样品
询价
TI
500
询价
2022+
1
全新原装 货期两周
询价