Features ¼ supply current of a LM148: 200 µA/Amplifier (max) Low input bias current: 50 pA (max) High gain bandwidth: 1 MHz High slew rate: 1 V/µs Low noise voltage for low power Low input noise current High input impedance: 1012 High gain: 50k (min) Description The LF444 quad low power operational amplifier provides many of the same AC characteristics as the industry standard LM148 while greatly improving the DC characteristics of the LM148. The amplifier has the same bandwidth, slew rate, and gain (10 k load) as the LM148 and only draws one fourth the supply current of the LM148. In addition the well matched high voltage JFET input devices of the LF444 reduce the input bias and offset currents by a factor of 10,000 over the LM148. The LF444 also has a very low equivalent input noise voltage for a low power amplifier. The LF444 is pin compatible with the LM148 allowing an immediate 4 times reduction in power drain in many applications. The LF444 should be used wherever low power dissipation and good electrical characteristics are the major considerations.

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

Datasheets

Title		Size	Date	Other Language
	LF444 Quad Low Power JFET Input Operational Amplifier	410 Kbytes	14-Sep-04	日本語

Application Notes

Title		Size	Date	Other Language
	AN-447: Application Note 447	76 Kbytes	4-Nov-95

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LF444ACN/NOPB LF444ACN RoHS Status	MDIP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 6350 AVNET-EM Worldwide 542 DIGI-KEY Worldwide 35 FARNELL Europe and Asia 38 MOUSER Worldwide 323 NEWARK Americas 289 TAYLOR Americas 6350	$1.16 each at 1K+ pcs	rail of 25
LF444CM/NOPB LF444CM RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 16 AVNET-EM Worldwide 2533 DIGI-KEY Worldwide 3045 FARNELL Europe and Asia 618 MOUSER Worldwide 709 NEWARK Americas 1255 RS COMPONENTS Worldwide 10 TAYLOR Americas 3756	$0.66 each at 1K+ pcs	rail of 55
LF444CMX/NOPB LF444CMX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 11298 DIGI-KEY Worldwide 0 MOUSER Worldwide 1994 TAYLOR Americas 11298	$0.66 each at 1K+ pcs	reel of 2500
LF444CN/NOPB LF444CN RoHS Status	MDIP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 851 AVNET-EM Worldwide 137 DIGI-KEY Worldwide 879 FARNELL Europe and Asia 960 MOUSER Worldwide 432 NEWARK Americas 215 RS COMPONENTS Worldwide 30 RSL MICRO Asia Pacific 12400 TAYLOR Americas 854	$0.67 each at 1K+ pcs	rail of 25

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LF444AMD	NONE	NONE	10 Mar 1998

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 LF444.

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 LF444 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
LF444ACN/NOPB LF444ACN	986.751 990.002	MDIP	14	1 1	NA NA	Detail	Download	spice file	NSUZXYYTTE# LF444ACN
LF444CM/NOPB LF444CM	129.551 130.001	SOIC NARROW	14	1 1	260 235	Detail	Download	spice file	NSUZXYTTE# LF444CM
LF444CMX/NOPB LF444CMX	129.551 130.001	SOIC NARROW	14	1 1	260 235	Detail	Download	spice file	NSUZXYTTE# LF444CM
LF444CN/NOPB LF444CN	986.751 990.002	MDIP	14	1 1	NA NA	Detail	Download	spice file	NSUZXYYTTE# LF444CN

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 LF444.

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 LF444 is located at RoHS Status.

Design Tools

Title	Size	Date
Amplifiers Selection Guide software for Windows

CAD Symbols and Models Download LF444 CAD Symbols

Models spice file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LF444ACN	BIFET	0	12875	0	0	1065000	4	302196657
LF444CM	BIFET	0	12875	0	0	1065000	4	302196657
LF444CMX	BIFET	0	12875	0	0	1065000	4	302196657
LF444CN	BIFET	0	12875	0	0	1065000	4	302196657

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

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 LF444.

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 LF444 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LF444AMD	NONE	NONE	10 Mar 1998