CS4122XDWF24 ,Triple Air-Core Gauge Driver with Serial Input BusELECTRICAL CHARACTERISTICS (−40°C ≤ T ≤ 105°C, 7.5 V ≤ V ≤ 14 V, 4.5 V ≤ V ≤ 5.5 V;A BB CCunless o ..
CS4122XDWFR24 ,Triple Air-Core Gauge Driver with Serial Input Bus3CS4122PIN FUNCTION DESCRIPTION PIN # PIN SYMBOL FUNCTION1 SCLK Serial clock for shifting in/out o ..
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CS-4-12YTA , ROTARY SELECTOR SWITCHES
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CS4122XDWF24-CS4122XDWFR24
Triple Air-Core Gauge Driver with Serial Input Bus
CS4122
Triple Air-Core Gauge
Driver with Serial Input Bus
The CS4122 converts digital data from a microprocessor to
complementary DC outputs and drives air−core meter movements for
vehicle instrument panels. It is optimized for one 360° gauge and two
112° gauges. The digital data controls the voltage applied to the
quadrature coils of the meters with a 0.35° resolution for the major
(360°) gauge and 0.44° resolution for the minor (112°) gauges. The
accuracy is ±0.75° for the major and ±1.00° for the minors. The
interface from the microcontroller is by a SPI compatible serial
connection using up to a 2.0 MHz shift clock rate.
The digital code is shifted into the appropriate DAC and
multiplexer. These two blocks provide a tangential conversion
function to change the digital data into the appropriate DC coil
voltage. The major gauge driver can position a pointer anywhere
within a 360° circle while the minor gauge drivers are limited to an arc
of 112.2°.
The output buffers are capable of 70 mA per coil and are protected
against output short circuit conditions. A thermal protection circuit
limits the junction temperature to approximately 160°C.
An open−drain fault output goes low when any of the outputs are
shorted or the device is in a thermal shutdown state. This ASIC is
designed on POWERSENSE 3.0.
Features Serial Input Bus 2.0 MHz Operating Frequency Independently Addressable Gauges Tangential Drive Algorithm 70 mA Drive Circuits 0.75° Major Accuracy Power−On−Reset Protection Features Short Circuit Overtemperature Internally Fused Leads in SO−24L Package
