ADCV08832CIM National Semiconductor, ADCV08832CIM Datasheet

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ADCV08832CIM

Manufacturer Part Number
ADCV08832CIM
Description
Low Voltage/ 8-Bit Serial I/O CMOS A/D Converter with Sample/Hold Function
Manufacturer
National Semiconductor
Datasheet

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© 2001 National Semiconductor Corporation
ADCV08832
Low Voltage, 8-Bit Serial I/O CMOS A/D Converter with
Sample/Hold Function
General Description
The ADCV08832 is a low voltage, 8-Bit successive approxi-
mation analog-to-digital converter with a 3-wire serial inter-
face. The serial I/O will interface to microcontrollers, PLD’s,
microprocessors, DSPs or shift registers. The serial I/O is
configured to comply with the NSC MICROWIRE
data exchange standard.
To minimize total power consumption, the ADCV08832 can
be set to go into low power mode whenever it is not perform-
ing conversions.
A sample/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 com-
binations of single-ended, differential, or pseudo-differential
modes.
Features
n 3-wire serial digital data link requires few I/O pins
n Single supply 2.7V to 5V
n Analog input track/hold function
n Analog input voltage range from GND to V
n No zero or full scale adjustment required
Connection Diagram
Ordering Information
COPS
and MICROWIRE
ADCV08832CIM
ADCV08832CIMX
Industrial (−40˚C
are trademarks of National Semiconductor Corporation.
Temperature Range
T
J
DS200084
+125˚C)
CC
SOIC-8 Package
serial
ADCV08832
Package
M08A
M08A
n TTL/CMOS input/output compatible
n Superior pin compatible replacement for TLV0832 and
Applications
n Digitizing sensors and waveforms
n Process control monitoring
n Remote sensing in noisy environments
n Instrumentation
n Embedded systems
n Low power circuits
Key Specifications
(For 3.3V supply, typical, unless otherwise noted)
n Resolution
n Conversion time (f
n Power dissipation
n Power down mode
n Total Unadjusted Error
n No missing codes over temperature
ADC0832
DS200084-1
ADC08832I
ADC08832I
Package
Marking
CLK
= 500 kHz)
95 Units in Rail
Tape and Reel
2500 Units in
Transport
Media
(−40˚C to +125˚C)
www.national.com
16 µs (max)
May 2001
±
<
0.8 LSB
1.7 mW
0.1 µW
8 bits

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ADCV08832CIM Summary of contents

Page 1

... No zero or full scale adjustment required Connection Diagram Ordering Information Temperature Range Industrial (−40˚ ADCV08832CIM ADCV08832CIMX COPS ™ and MICROWIRE ™ are trademarks of National Semiconductor Corporation. © 2001 National Semiconductor Corporation n TTL/CMOS input/output compatible n Superior pin compatible replacement for TLV0832 and ...

Page 2

... 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 Input Current at Any Pin (Note 4) Package Input Current (Note 4) ESD Susceptibility (Note 6) Human Body Model ...

Page 3

Electrical Characteristics The following specifications apply for V limits apply for MIN Symbol Parameter Clock Duty Cycle (Note 12) t Conversion Time (Not Including MUX CONV Addressing Time) t Acquisition Time ...

Page 4

Dynamic Characteristics Note 14: Analog inputs are typically 300 input resistance in series with sample and hold. Note 15: Effective Number Of Bits (ENOB) is calculated from the measured signal-to-noise plus distortion ratio (SINAD) using the equation ...

Page 5

ADCV08832 Functional Block Diagram 5 www.national.com ...

Page 6

Typical Performance Characteristics unless otherwise specified. TUE vs Clock Frequency DNL vs Output Codes Typical Digital Output Current vs Temperature www.national.com The following specifications apply for T INL vs Output Codes DS200084-48 I (operating DS200084-50 I (operating) ...

Page 7

Typical Performance Characteristics unless otherwise specified. (Continued) Spectral Response with 1.9 kHz Sine Wave Input 500 kHz CLK Spectral Response with 18.8 kHz Sine Wave Input 500 kHz CLK Leakage Current Test Circuit The following specifications ...

Page 8

TRI-STATE Test Circuits and Waveforms Timing Diagrams www.national.com DS200084-20 Data Input Timing Data Output Timing 8 DS200084-21 DS200084-22 DS200084-23 ...

Page 9

Timing Diagrams (Continued) 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. In differential ...

Page 10

Functional Description 5. During the conversion, the output of the SAR compara- tor indicates whether the successive analog input is greater than (high) or less than (low) a series of voltages generated internally from a ratioed capacitor array (first 5 ...

Page 11

Functional Description digitally analyze the frequency components of the signal. Depending on the application, further digital processing can be applied. 6.1 Sampling Rate The Sampling Rate, sometimes referred to as the Through- put Rate, is the time between repetitive samples ...

Page 12

Applications (Continued) www.national.com Isolated Data Converter 12 DS200084-40 ...

Page 13

Applications (Continued) A “Stand-Alone” Hook-Up for ADCV08832 Evaluation 13 DS200084-39 www.national.com ...

Page 14

... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted Order Number ADCV08832CIM NS Package Number M08A 2 ...

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