LM9044VX/NOPB National Semiconductor, LM9044VX/NOPB Datasheet

IC AMP SENSOR INTERFACE 20-PLCC

LM9044VX/NOPB

Manufacturer Part Number
LM9044VX/NOPB
Description
IC AMP SENSOR INTERFACE 20-PLCC
Manufacturer
National Semiconductor
Type
Sensor Interfacer
Datasheet

Specifications of LM9044VX/NOPB

Input Type
Voltage
Output Type
Voltage
Current - Supply
500µA
Mounting Type
Surface Mount
Package / Case
20-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Other names
*LM9044VX
*LM9044VX/NOPB
LM9044VX

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM9044VX/NOPB
Manufacturer:
Texas Instruments
Quantity:
10 000
© 2009 National Semiconductor Corporation
Lambda Sensor Interface Amplifier
General Description
The LM9044 is a precision differential amplifier specifically
designed for operation in the automotive environment. Gain
accuracy is guaranteed over the entire automotive tempera-
ture 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 be-
low 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 R
mum operating frequency of the amplifier, thereby filtering
high frequency transients. Both inputs are protected against
accidental shorting to the battery and against load dump tran-
sients. 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
Typical Application
F
6744
pin sets the maxi-
LM9044
detect open circuit conditions on either or both inputs and
force the output to a “home” position (a ratio of the external
reference voltage).
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)
March 3, 2009
www.national.com
674415

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LM9044VX/NOPB Summary of contents

Page 1

... The output op amp is capable of driving capacitive loads and is fully protected. Also, internal circuitry has been provided to Typical Application © 2009 National Semiconductor Corporation LM9044 detect open circuit conditions on either or both inputs and force the output to a “home” position (a ratio of the external reference voltage) ...

Page 2

Connection Diagram *Pins 10, 11, 13, 14, 16, 18, 19 are trim pins and should be left floating. www.national.com Plastic Chip Carrier Package 674406 Top View Order Number LM9044V See NS Package Number V20A ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V Supply Voltage ( kΩ Supply Voltage REF DC Input Voltage (Either input)(Note 3) Input Transients (Note 2) Power Dissipation see (Note 8) Electrical Characteristics Parameter ...

Page 4

Typical Performance Characteristics Non-Inverting Input Bias Current vs Temperature V Supply Current vs REF Temperature Short Circuit Output Current vs Temperature www.national.com Inverting Input Bias Current vs Temperature 674402 V CC 674408 Differential Gain vs 674410 4 674407 Supply Current ...

Page 5

Voltage Gain vs Frequency V Power Supply REF Rejection Test Circuit CMRR vs Frequency 674411 V Power Supply Rejection CC 674413 674405 5 674412 674404 www.national.com ...

Page 6

Block Diagram Application Information CIRCUIT DESCRIPTION The LM9044 is a single channel device intended to act as a linear interface between a zirconium dioxide oxygen sensor and an A-to-D convertor. The LM9044 is fabricated in Bipolar technology and requires two ...

Page 7

Any common mode voltage transient on the inverting input pin which goes above the comparator threshold will immediately cause the output to switch to the resistive voltage divider mode. The output will return to normal operation when the voltage on ...

Page 8

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Plastic Chip Carrier Package Order Number LM9044V NS Package Number V20A 8 ...

Page 9

Notes 9 www.national.com ...

Page 10

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