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ADC08031 Просмотр технического описания (PDF) - National ->Texas Instruments

Номер в каталогеADC08031 National-Semiconductor
National ->Texas Instruments National-Semiconductor
Компоненты Описание8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function
ADC08031 Datasheet PDF : 24 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ADC08038 Functional Block Diagram
Functional Description
The design of these converters utilizes a comparator struc-
ture with built-in sample-and-hold which provides for a differ-
ential analog input to be converted by a successive-
approximation routine.
The actual voltage converted is always the difference be-
tween an assigned “+” input terminal and a “−” input terminal.
The polarity of each input terminal of the pair indicates which
line the converter expects to be the most positive. If the as-
signed “+” input voltage is less than the “−” input voltage the
converter responds with an all zeros output code.
A unique input multiplexing scheme has been utilized to pro-
vide multiple analog channels with software-configurable
single-ended, differential, or pseudo-differential (which will
convert the difference between the voltage at any analog in-
put and a common terminal) operation. The analog signal
conditioning required in transducer-based data acquisition
systems is significantly simplified with this type of input flex-
ibility. One converter package can now handle ground refer-
enced inputs and true differential inputs as well as signals
with some arbitrary reference voltage.
A particular input configuration is assigned during the MUX
addressing sequence, prior to the start of a conversion. The
MUX address selects which of the analog inputs are to be
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