LM9040 Datasheet - National Semiconductor

LM9040 Dual Lambda Sensor Interface Amplifier

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.

LM9040 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 L

LM9040_NationalSemiconductor.pdf