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LM9040 - Dual Lambda Sensor Interface Amplifier

Datasheet Summary

Description

The LM9040 is a dual sensor interface circuit consisting of two independent sampled input differential amplifiers designed for use with conventional Lambda Oxygen Sensors The Lambda Sensor is used for monitoring the oxygen concentration in the exhaust of gasoline engines using catalytic after treatm

Features

  • Y Y Y Y Y Y Y Y Y Y Single 5V supply operation Common mode input voltage range of g 2V Differential input voltage range of 50 mV to 950 mV Sampled differential input Switched capacitor low pass filter Internal oscillator and VBB generator Open input default operation Cold sensor default operation Low power consumption (42 mW max) Gain set by design and guaranteed over the operating temperature range.

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Datasheet Details

Part number LM9040
Manufacturer National Semiconductor
File Size 178.74 KB
Description Dual Lambda Sensor Interface Amplifier
Datasheet download datasheet LM9040 Datasheet
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LM9040 Dual Lambda Sensor Interface Amplifier August 1995 LM9040 Dual Lambda Sensor Interface Amplifier General Description The LM9040 is a dual sensor interface circuit consisting of two independent sampled input differential amplifiers designed for use with conventional Lambda Oxygen Sensors The Lambda Sensor is used for monitoring the oxygen concentration in the exhaust of gasoline engines using catalytic after treatment and will deliver a voltage signal which is dependent on the air-fuel mixture The gain of the amplifiers are internally set and can directly convert the Lambda sensor output voltage to a level suitable for A D conversion in a system using a 5V reference The input common mode voltage range of each amplifier is g 2V with respect to the IC ground pin This will allow the I
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