ADC08831IWM NSC [National Semiconductor], ADC08831IWM Datasheet

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ADC08831IWM

Manufacturer Part Number
ADC08831IWM
Description
8-Bit Serial I/O CMOS A/D Converters with Multiplexer and Sample/Hold Function
Manufacturer
NSC [National Semiconductor]
Datasheet

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ADC08831IWM
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© 1999 National Semiconductor Corporation
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 COPS
PLD’s, microprocessors, DSP’s, or shift registers. The serial
I/O is configured to comply with the NSC MICROWIRE
rial data exchange standard.
To
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
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
Typical Application
COPS
MICROWIRE
TRI-STATE
is a trademark of National Semiconductor Corporation.
minimize
is a trademark of National Semiconductor Corporation.
of
total
single-ended,
power
family of micro-controllers,
consumption,
DS100108
differential,
se-
the
or
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 V
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:
n Conversion time (f
n Power dissipation: 8.5mW (typ)
n Low power mode: 3.0mW (typ)
n Single supply: 5V
n Total unadjusted error:
n No missing codes over temperature
8 bits
C
DC
= 2 MHz): 4µs (max)
±
1LSB
DS100108-44
DS100108-43
September 1999
CC
www.national.com

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ADC08831IWM Summary of contents

Page 1

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 ...

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... Connection Diagrams ADC08831 Wide Body SO Packages DS100108-4 ADC08831 N,M,MM Packages DS100108-2 Ordering Information Industrial (−40˚C ADC08831IN ADC08832IN ADC08831IWM, ADC08832IWM, ADC08831IM, ADC08832IM, ADC08831IMM, ADC08832IMM, www.national.com Wide Body SO Packages N,M,MM Packages Temperature Range Package T +85˚C) J N08E M14B M08A MUA08A 2 ADC08832 DS100108-3 ADC08832 DS100108-1 ...

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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Voltage at Inputs and Outputs −0. Input Current at Any Pin (Note ...

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Electrical Characteristics The following specifications apply for apply for all other limits MIN MAX Symbol Parameter DC CHARACTERISTICS I Supply Current ADC08831 CC CLK = V CC ...

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Dynamic Characteristics The following specifications apply for V CC non-coherent 2048 samples with windowing. Symbol Parameter f Sampling Rate ADC08831 S ADC08832 SNR Signal-to -Noise Ratio (Note 19) THD Total Harmonic Distortion (Note 20) SINAD Signal-to -Noise and Distortion ENOB ...

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Block Diagram * For ADC08831 V pin is available, for ADC08832 DI pin is available, and V REF Pin names in parentheses refer to ADC08832 www.national.com DS100108-47 is tied to V REF CC 6 ...

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Typical Performance Characteristics 5V, unless otherwise specified. Linearity Error (TUE) vs Reference Voltage DS100108-27 Power Supply Current vs Temperature (ADC08831) DS100108-35 Output Current vs Temperature DS100108-33 The following specifications apply for T Linearity Error (TUE) vs Temperature DS100108-15 Power Supply ...

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Typical Performance Characteristics 5V, unless otherwise specified. (Continued) Spectral Response with 10KHz Sine Wave Input DS100108-13 Total Unadjuster Error Plot Leakage Current Test Circuit www.national.com The following specifications apply for T Spectral Response with 55 KHz Sine Wave Input DS100108-34 ...

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TRI-STATE Test Circuits and Waveforms DS100108-20 Timing Diagrams DS100108-21 Data Input Timing DS100108-22 Data Output Timing DS100108-23 9 www.national.com ...

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Timing Diagrams (Continued) *LSB first output not available on ADC08831. www.national.com ADC08831 Start Conversion Timing ADC08831 Timing ADC08832 Timing 10 DS100108-24 DS100108-25 DS100108-26 ...

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ADC08832 Functional Block Diagram 11 www.national.com ...

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Functional Description 1.0 MULTIPLEXER ADDRESSING 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 approxi- mation routine. The actual voltage converted is ...

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Functional Description (Continued) 3.0 Reducing Power Consumption The ADC08831 operate 2MHz clock frequency, or about 181 ksps supply, it consumes about 1 8.5 mW when CS is logic low. The ADC08831 has a ...

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Functional Description 5.0 THE ANALOG INPUTS The most important feature of these converters is that they can be located right at the analog signal source and through just a few wires can communicate with a controlling proces- sor with a ...

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Functional Description (Continued) The voltage is then adjusted to provide a REF CC code change from This completes the ad- HEX HEX justment procedure. 7.0 DYNAMIC PERFORMANCE Dynamic performance specifications are ...

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Applications (− XDR CC www.national.com Low-Cost Remote Temperature Sensor Operating with Ratiometric Transducers 16 DS100108-6 DS100108-7 ...

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Applications (Continued) Zero-Shift and Span Adjust Span Adjust DS100108-8 www.national.com ...

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Applications (Continued) Diodes are 1N914 • Uses one more wire than load cell itself • Two mini-DIPs could be mounted inside load cell for digital output transducer • Electronic offset and gain trims relax mechanical specs for gauge factor and ...

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Applications (Continued) • All power supplied by loop • 1500V isolation at output 4 mA-20 mA Current Loop Converter Isolated Data Converter 19 DS100108-11 DS100108-40 www.national.com ...

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Applications (Continued) A “Stand-Alone” Hook-Up for ADC08832 Evaluation www.national.com 20 DS100108-39 ...

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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number ADC08831IWM, ADC08832IWM, Order Number ADC08831IM or ADC08832IM NS Package Number M14B NS Package Number M08A 21 www.national.com ...

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) www.national.com Order Number ADC08831IN, ADC08832IN NS Package Number N08E 22 ...

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number ADC08831IMM or ADC08832IMM LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT ...

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