LM9044V National Semiconductor, LM9044V Datasheet

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LM9044V

Manufacturer Part Number
LM9044V
Description
LM9044 Lambda Sensor Interface Amplifier
Manufacturer
National Semiconductor
Datasheet

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C 1995 National Semiconductor Corporation
LM9044 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 (
to package assembly The input circuitry has been specifi-
cally designed to reject common-mode signals as much as
3V below ground on a single positive power 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 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 M
The output op amp is capable of driving capacitive loads
and is fully protected Also internal circuitry has been pro-
Schematic and Connection Diagrams
trim pins and should be left floating
Pins 1 3 4 6 8 9 10 11 13 14 16 18 19 are
b
40 C to
a
125 C) and is factory trimmed prior
TL H 6744
Plastic Chip Carrier Package
Top View
vided to detect open circuit conditions on either or both in-
puts and force the output to a ‘‘home’’ position (a ratio of
the external reference voltage)
Features
Y
Y
Y
Y
Y
Y
Y
Normal circuit operation guaranteed with inputs up to
3V below ground on a single supply
Gain factory trimmed and guaranteed over temperature
(
Low power consumption (typically 1 mA)
Fully protected inputs
Input open circuit detection
Operation guaranteed over the entire automotive tem-
perature range (
Single supply operation
g
3% of full-scale from
TL H 6744 – 6
b
40 C to
See NS Package Number V20A
b
Order Number LM9044V
a
40 C to
125 C)
a
RRD-B30M115 Printed in U S A
125 C)
February 1995
TL H 6744 – 1

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LM9044V Summary of contents

Page 1

... Input open circuit detection Y Operation guaranteed over the entire automotive tem- Y perature range ( Single supply operation Y Plastic Chip Carrier Package Order Number LM9044V See NS Package Number V20A TL H 6744 – 6 Top View February 1995 125 C) a 125 6744 – 1 ...

Page 2

... 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 ( Supply Voltage REF DC Input Voltage (Either Input) Input Transients (Note 1) Power Dissipation (see Note 6) Output Short Circuit Duration ...

Page 3

Typical Performance Characteristics Non-Inverting Input Bias Current vs Temperature V Supply Current vs REF Temperature Short Circuit Output Current vs Temperature Inverting Input Bias Current vs Temperature V Supply Current vs CC Temperature Differential Gain vs Temperature ...

Page 4

Typical Performance Characteristics Voltage Gain vs Frequency V Power Supply REF Rejection Test Circuit (Continued) CMRR vs Frequency V Power Supply Rejection 6744 – 6744 – 4 ...

Page 5

5 ...

Page 6

... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications Plastic Chip Carrier Package Order Number LM9044V NS Package Number V20A 2 A critical component is any component of a life ...

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