Top

Product details

Parameters

Rating Catalog open-in-new Find other Sample & hold amplifiers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 14 52 mm² 8.65 x 6 open-in-new Find other Sample & hold amplifiers

Features

  • Operates from ±5-V to ±18-V Supplies
  • Less than 10-µs Acquisition Time
  • Logic Input Compatible With TTL, PMOS, CMOS
  • 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

All trademarks are the property of their respective owners.

open-in-new Find other Sample & hold amplifiers

Description

The LFx98x devices are monolithic sample-and-hold circuits that use BI-FET technology to obtain ultrahigh 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 LFx98x to be included inside the feedback loop of 1-MHz operational amplifiers without having stability problems. Input impedance of 1010 Ω allows high-source impedances to be used without degrading accuracy.

P-channel junction FETs 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 JFETs have much lower noise than MOS devices used in previous designs and do not exhibit high temperature instabilities. The overall design ensures no feedthrough from input to output in the hold mode, even for input signals equal to the supply voltages.

Logic inputs on the LFx98x are fully differential with low input current, allowing for direct connection to TTL, PMOS, and CMOS. Differential threshold is
1.4 V. The LFx98x will operate from ±5-V to ±18-V supplies.

An A version is available with tightened electrical specifications.

open-in-new Find other Sample & hold amplifiers
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
LF398-N-MIL ACTIVE Monolithic Sample and Hold Circuit This device is a military grade version

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet LFx98x Monolithic Sample-and-Hold Circuits datasheet (Rev. C) Oct. 05, 2018
Application notes AN-298 Isolation Techniques for Signal Conditioning (Rev. B) May 06, 2013
Application notes AN-301 Signal Conditioning for Sophisticated Transducers (Rev. B) May 06, 2013
Application notes Applications of the LM3524 Pulse Width Modulator (Rev. B) Apr. 23, 2013
Application notes Using ADC0808/809 8-Bit uP Compble ADCs w/8-Chan Analog Multiplexr (Rev. B) Apr. 22, 2013
More literature Die D/S LF398 MDC Monolithic Sample And Hold Circuit Sep. 07, 2012
Application notes Data Acq Using ADC0816 & ADC0817 8-Bit ADC w/On-Chip 16 Chan Multiplexr May 10, 2004
Application notes AN-294 Special Sample and Hold Techniques May 10, 2004
Application notes Specifications and Architectures of Sample-and-Hold Amplifiers May 03, 2004
Application notes Freq-to-Vltg Converter Uses Sample-and-Hold to Improve Response & Ripple Oct. 03, 2002

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 14 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos