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ADC08831 Datasheet(PDF) 1 Page - National Semiconductor (TI)

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Part No. ADC08831
Description  8-Bit Serial I/O CMOS A/D Converters with Multiplexer and Sample/Hold Function
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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ADC08831/ADC08832
8-Bit Serial I/O CMOS A/D Converters with Multiplexer
and Sample/Hold Function
General Description
The ADC08831/ADC08832 are 8-bit successive approxima-
tion Analog to Digital converters with 3-wire serial interfaces
and a configurable input multiplexer for 2 channels. The se-
rial I/O will interface to COPSfamily of micro-controllers,
PLD’s, microprocessors, DSP’s, or shift registers. The serial
I/O is configured to comply with the NSC MICROWIREse-
rial data exchange standard.
To
minimize
total
power
consumption,
the
ADC08831/ADC08832 automatically go into low power
mode whenever they are not performing conversions.
A track/hold function allows the analog voltage at the positive
input to vary during the actual A/D conversion.
The analog inputs can be configured to operate in various
combinations
of
single-ended,
differential,
or
pseudo-differential modes. The voltage reference input can
be adjusted to allow encoding of small analog voltage spans
to the full 8-bits of resolution.
Applications
n Digitizing sensors and waveforms
n Process control monitoring
n Remote sensing in noisy environments
n Instrumentation
n Embedded Systems
Features
n 3-wire serial digital data link requires few I/O pins
n Analog input track/hold function
n 2-channel input multiplexer option with address logic
n Analog input voltage range from GND to VCC
n No zero or full scale adjustment required
n TTL/CMOS input/output compatible
n Superior pin compatible replacement for ADC0831/2
Key Specifications
n Resolution:
8 bits
n Conversion time (fC = 2 MHz):
4µs (max)
n Power dissipation:
8.5mW (typ)
n Low power mode: 3.0mW (typ)
n Single supply:
5V
DC
n Total unadjusted error:
±1LSB
n No missing codes over temperature
Typical Application
COPSis a trademark of National Semiconductor Corporation.
MICROWIREis a trademark of National Semiconductor Corporation.
TRI-STATE
DS100108-44
DS100108-43
September 1999
© 1999 National Semiconductor Corporation
DS100108
www.national.com




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