LM1042 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Fluid Level Detector

February 1995
LM1042 Fluid Level Detector
General Description
The LM1042 uses the thermal-resistive probe technique to
measure the level of non-flammable fluids An output is pro-
vided proportional to fluid level and single shot or repeating
measurements may be made All supervisory requirements
to control the thermal-resistive probe including short and
open circuit probe detection are incorporated within the de-
vice A second linear input for alternative sensor signals
may also be selected
Features
Y _{Selectable thermal-resistance or linear probe inputs}
Y _{Control circuitry for thermal-resistive probe}
Y _{Single-shot or repeating measurements}
Y _{Switch on reset and delay to avoid transients}
Y _{Output amplifier with 10 mA source and sink capability}
Y _{Short or open probe detection}
Y a_{50V transient protection on supply and control input}
Y _{7 5V to 18V supply range}
Y _{Internally regulated supply}
Y b_{40 C to} a_{80 C operation}
Block Diagram
C1995 National Semiconductor Corporation TL H 8709
TL H 8709 – 1
RRD-B30M115 Printed in U S A