Features Normal circuit operation guaranteed with inputs up to 3V below ground on a single supply. Gain factory trimmed and guaranteed over temperature (±3% of full-scale from −40°C to +125°C) Low power consumption (typically 1 mA) Fully protected inputs Input open circuit detection Operation guaranteed over the entire automotive temperature range (−40°C to +125°C) Description The LM9044 is a precision differential amplifier specifically designed for operation in the automotive environment. Gain accuracy is guaranteed over the entire automotive temperature range (−40°C to +125°C) and is factory trimmed after package assembly. The input circuitry has been specifically designed to reject common-mode signals as much as 3V below ground without the need for a negative voltage supply. This facilitates the use of sensors which are grounded at the engine block while the LM9044 itself is grounded at chassis potential. An external capacitor on the RF pin sets the maximum operating frequency of the amplifier, thereby filtering high frequency transients. Both inputs are protected against accidental shorting to the battery and against load dump transients. The input impedance is typically 1.2 MΩ. The output op amp is capable of driving capacitive loads and is fully protected. Also, internal circuitry has been provided to detect open circuit conditions on either or both inputs and force the output to a “home” position (a ratio of the external reference voltage).

Typical Application

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

Datasheets

Title		Size	Date	Other Language
	LM9044 Lambda Sensor Interface Amplifier	269 Kbytes	3-Mar-09

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM9044V/NOPB LM9044V RoHS Status	PLCC	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 110 AVNET-EM Worldwide 137 DIGI-KEY Worldwide 164 TAYLOR Americas 110	$1.56 each at 1K+ pcs	rail of 40
LM9044VX/NOPB LM9044VX RoHS Status	PLCC	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.56 each at 1K+ pcs	reel of 1000

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 LM9044.

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 LM9044 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
LM9044V/NOPB LM9044V	673.65 676	PLCC	20	2A 2A	250 250	Detail	N/A	N/A	NSUZXYTTE# LM9044V
LM9044VX/NOPB LM9044VX	673.65 676	PLCC	20	2A 2A	250 250	Detail	N/A	N/A	NSUZXYTTE# LM9044V

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 LM9044.

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 LM9044 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM9044V	SLM	0	44046	0	0	3532500	1	1002356520
LM9044VX	SLM	0	44046	0	0	3532500	1	1002356520

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 LM9044.

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 LM9044 is located at RoHS Status.