LM1830N National Semiconductor, LM1830N Datasheet

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LM1830N

Manufacturer Part Number
LM1830N
Description
IC FLUID LEVEL DETECTOR 14-DIP
Manufacturer
National Semiconductor
Type
Detector Controllerr
Datasheet

Specifications of LM1830N

Input Type
AC
Output Type
AC, DC
Current - Supply
10mA
Mounting Type
Through Hole
Package / Case
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Interface
-
Other names
*LM1830N
LM1830

Available stocks

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Quantity
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C 1995 National Semiconductor Corporation
Logic and Connection Diagram
LM1830 Fluid Detector
General Description
The LM1830 is a monolithic bipolar integrated circuit de-
signed for use in fluid detection systems The circuit is ideal
for detecting the presence absence or level of water or
other polar liquids An AC signal is passed through two
probes within the fluid A detector determines the presence
or absence of the fluid by comparing the resistance of the
fluid between the probes with the resistance internal to the
integrated circuit An AC signal is used to overcome plating
problems incurred by using a DC source A pin is available
for connecting an external resistance in cases where the
fluid impedance is of a different magnitude than that of the
internal resistor When the probe resistance increases
above the preset value the oscillator signal is coupled to
the base of the open-collector output transistor In a typical
application the output could be used to drive a LED loud
speaker or a low current relay
TL H 5700
See NS Package Number N14A
Order Number LM1830N
Dual-In-Line Package
Features
Y
Y
Y
Y
Y
Y
Applications
Y
Y
Y
Y
Y
Low external parts count
Wide supply operating range
One side of probe input can be grounded
AC coupling to probe to prevent plating
Internally regulated supply
AC or DC output
Beverage dispensers
Water softeners
Irrigation
Sump pumps
Aquaria
TL H 5700– 1
Y
Y
Y
Y
Radiators
Washing machines
Reservoirs
Boilers
RRD-B30M115 Printed in U S A
February 1995

Related parts for LM1830N

LM1830N Summary of contents

Page 1

... One side of probe input can be grounded Y AC coupling to probe to prevent plating Y Internally regulated supply output Y Applications Beverage dispensers Y Water softeners Y Irrigation Y Sump pumps Y Aquaria Y Dual-In-Line Package TL H 5700– 1 Order Number LM1830N See NS Package Number N14A February 1995 Radiators Y Washing machines Y Reservoirs Y Boilers Y RRD-B30M115 Printed ...

Page 2

... Detector Threshold Resistance Output Saturation Voltage Output Leakage Oscillator Frequency Note 1 The maximum junction temperature rating of the LM1830N is 150 C For operation at elevated temperatures devices in the dual-in-line plastic package must be derated based on a thermal resistance Schematic Diagram Output Sink Current Operating Temperature Range ...

Page 3

Typical Performance Characteristics Normalized Oscillator Frequency vs Supply Voltage Reference Resistor vs Ambient Temperature Oscillator V and Ambient Temperature Threshold Resistance vs Supply Power Supply Current vs Voltage Supply Voltage Detector Threshold Voltage Probe Threshold Resistance ...

Page 4

Application Hints The LM1830 requires only an external capacitor to com- plete the oscillator circuit The frequency of oscillation is inversely proportional to the external capacitor value Using 0 001 F capacitor the output frequency is approximately 6 kHz The ...

Page 5

Typical Applications V 16V e CC FIGURE 1 Test Circuit FIGURE 3 Basic Low Level Warning Device with LED Indication FIGURE 2 Application Using External Reference Resistor Output is activated when R is approximately greater than p FIGURE 4 Direct ...

Page 6

Typical Applications V 16V (Continued Low Level Warning with Audio Output High Level Warning Device The Output is suitable for driving a sump pump or opening a drain valve etc 5700 – 5 ...

Page 7

7 ...

Page 8

... 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 Molded Dual-In-Line Package (N) Order Number LM1830N NS Package Number N14A 2 A critical component is any component of a life ...

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