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|World's First Sample-and-Infinite-Hold Voltage Reference is Ideal for
Systems Requiring Voltage Adjustment During Factory Calibration|
DALLAS, TX —Dallas
Semiconductor today announced the introduction of the DS4303, the world's first sample-and-infinite-hold voltage
The DS4303 replaces a standard voltage reference plus discrete resistor or potentiometer in embedded
systems requiring voltage adjustment during factory calibration. Because it is electrically programmable, the DS4303
can be used to automate the calibration process, which contributes to improved quality, increased assembly
throughput, and lower production costs. Its inexpensive price ($0.35/10K-up) and small size (5-pin SOT23 package)
make the DS4303 suitable for a wide variety of applications.
The DS4303 is intended for use in
closed-loop calibration systems. It samples a user-applied input voltage and then "locks in" this voltage at its
output which, in turn, sets the parameter being calibrated. The system output must then be measured for accuracy
and, if necessary, the input voltage can be adjusted and resampled to improve system output accuracy. This procedure
can be repeated as many times as necessary. The DS4303's output can be set to within 300mV of the supply rails with
±1mV accuracy when used in a closed-loop calibration system. Once the desired voltage has been locked into the
DS4303, the digitized value is permanently stored in on-board nonvolatile memory that will retain the data even when
powered down. The DS4303 has a 2.4V to 3.6V supply range and a -40°C to +85°C operating temperature range.
A related future product, the DS4305*, will provide the same functionality as the new DS4303, but
over a 4V to 5.5V supply range with ±1.5mV accuracy.
Jueves, 30 Junio, 2005 - 07:43