ADC180C Просмотр технического описания (PDF) - Thaler Corporation
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ADC180C Datasheet PDF : 7 Pages
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ADC180
Programmable
Integrating A/D Converter
THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000
FEATURES
• 26 BIT RESOLUTION
• UP TO 2.5kHz CONVERSION RATES
• AUTO ZERO FUNCTION
• ±10.48 V INPUT RANGE
• 0.5ppm/°C MAX. SCALE FACTOR ERROR
AND 2 ppm MAX. LINEARITY ERROR
(-55°C to +125°C).
• 8 BIT PARALLEL DATA BUS
• INTERNAL CRYSTAL CLOCK and
PRECISION REFERENCE
• LOW POWER CONSUMPTION: 0.4 WATTS
APPLICATIONS
• INERTIAL GUIDANCE
• TEST EQUIPMENT
• DATA ACQUISITION
• SCIENTIFIC INSTRUMENTS
• MEDICAL INSTRUMENTS
• WEIGHT SCALES
DESCRIPTION
The ADC180 is a 26 bit, charge balanced A/D
converter. Continuous sampling of 20 MHz and
conversion rates of up to 2.5 kHz make the converter
ideal for low frequency signal measurement. The
integration time is user selectable through an
external capacitor.
The ADC180 will continuously collect and average
integrations until the user requests data. Converter
resolution is dependent on the number of integration
cycles completed before the data is requested.
Converter resolution ranges from 13 - 26 bits.
In order to retain accuracy, internal calculations are
made at a 32 bit level. The output of the result is
also made at the 32 bit level. This makes it possible
to use a relatively high conversion rate and average
the data external to the converter without loss of
accuracy due to computation roundoff errors. For
inertial guidance systems, velocity information can
be obtained at a high rate without loss of position
accuracy.
The use of hybrid technology allows for separation
of sensitive analog circuitry from digital circuit
noise. This produces far superior accuracy over
monolithic A/D convertors.
The converter uses a proprietary, patented charge
balance modulator. It has an internal crystal clock,
microcontroller, precision reference, and patented
nonlinear temperature compensation network which
provides excellent electrical performance over
temperature.
The maximum scale factor drift is 0.5ppm/oC,
maximum offset drift of 0.1ppm/oC, and a maximum
nonlinearity over the mil. temp. range of 2 ppm.
The ADC180 is packaged in a 40 pin hermetic
TDIP and requires ±15V and +5V supplies. The
converter dissipates 450 mW and is available in
commercial and military grades.
ADC180DS REV H MAR 00
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