Features Advantages Replace expensive hybrid and module FET op amps Rugged JFETs allow blow-out free handling compared with MOSFET input devices Excellent for low noise applications using either high or low source impedance-very low 1/f corner Offset adjust does not degrade drift or common-mode rejection as in most monolithic amplifiers New output stage allows use of large capacitive loads (5,000 pF) without stability problems Internal compensation and large differential input voltage capability Description These are the first monolithic JFET input operational amplifiers to incorporate well matched, high voltage JFETs on the same chip with standard bipolar transistors (BI-FET™ Technology). These amplifiers feature low input bias and offset currents/low offset voltage and offset voltage drift, coupled with offset adjust which does not degrade drift or common-mode rejection. The devices are also designed for high slew rate, wide bandwidth, extremely fast settling time, low voltage and current noise and a low 1/f noise corner. Applications Precision high speed integrators Fast D/A and A/D converters High impedance buffers Wideband, low noise, low drift amplifiers Logarithmic amplifiers Photocell amplifiers Sample and Hold circuits

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LF256 JFET Input Operational Amplifier	1079 Kbytes	17-Dec-01

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LF256H/NOPB LF256H RoHS Status	TO-99	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1299 DIGI-KEY Worldwide 438 MOUSER Worldwide 500 TAYLOR Americas 1299	$4.03 each at 1K+ pcs	box of 500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LF256.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LF256 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LF256H/NOPB LF256H	969.917 971.007	TO-99	8	1 1	NA NA	Detail	Download	spice file	NSZXYTTE# LF256H

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LF256.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LF256 is located at RoHS Status.

Design Tools

Title	Size	Date
Amplifiers Selection Guide software for Windows

CAD Symbols and Models Download LF256 CAD Symbols

Models spice file