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參數(shù)資料
| 型號： | LM1830N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Fluid Detector |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP14 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-14 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 150K |
| 代理商： | LM1830N |
TL/H/5700
L
February 1995
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.
Features
Y
Low external parts count
Y
Wide supply operating range
Y
One side of probe input can be grounded
Y
AC coupling to probe to prevent plating
Y
Internally regulated supply
Y
AC or DC output
Applications
Y
Beverage dispensers
Y
Radiators
Y
Water softeners
Y
Washing machines
Y
Irrigation
Y
Reservoirs
Y
Sump pumps
Y
Boilers
Y
Aquaria
Logic and Connection Diagram
Dual-In-Line Package
TL/H/5700–1
Order Number LM1830N
See NS Package Number N14A
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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