LM1819 Air-Core Meter Driver
February 1995
LM1819 Air-Core Meter Driver
General Description
The LM1819 is a function generator driver for air-core (moving-magnet) meter movements A Norton amplifier and an
NPN transistor are included on chip for signal conditioning as required Driver outputs are self-centering and develop g 4 5V swing at 20 mA Better than 2% linearity is guaranteed over a full 305-degree operating range
Features
Y Y Y Y
Self-centering 20 mA outputs 12V operation Norton amplifier Function generator
Applications
Y Y Y
Air-core meter driver Tachometers Ruggedized instruments
Typical Application
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TL H 5263 – 1
FIGURE 1 Automotive Tachometer Application...