ADC08238CIN National Semiconductor, ADC08238CIN Datasheet

IC ADC 8BIT NS SERIAL I/O 20-DIP

ADC08238CIN

Manufacturer Part Number
ADC08238CIN
Description
IC ADC 8BIT NS SERIAL I/O 20-DIP
Manufacturer
National Semiconductor
Datasheet

Specifications of ADC08238CIN

Number Of Bits
8
Sampling Rate (per Second)
286k
Data Interface
NSC MICROWIRE™, Serial
Number Of Converters
1
Power Dissipation (max)
20mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*ADC08238CIN
C 1995 National Semiconductor Corporation
ADC08231 ADC08234 ADC08238 8-Bit 2 s Serial I O
A D Converters with MUX Reference and Track Hold
General Description
The ADC08231 ADC08234 ADC08238 are 8-bit succes-
sive approximation A D converters with serial I O and con-
figurable input multiplexers with up to 8 channels The serial
I O is configured to comply with the NSC MICROWIRE
serial data exchange standard for easy interface to the
COPS
standard shift registers or microprocessors
Designed for high-speed low-power applications the devic-
es are capable of a fast 2 s conversion when used with a
4 MHz clock
All three devices provide a 2 5V band-gap derived reference
with guaranteed performance over temperature
A track hold function allows the analog voltage at the posi-
tive 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-differ-
ential modes In addition input voltage spans as small as 1V
can be accommodated
Applications
Y
Y
Y
Y
Y
Y
Y
ADC08238 Simplified Block Diagram
TRI-STATE is a registered trademark of National Semiconductor Corporation
COPS
High-speed data acquisition
Digitizing automotive sensors
Process control monitoring
Remote sensing in noisy environments
Disk drives
Portable instrumentation
Test systems
TM
microcontrollers and MICROWIRE
TM
family of controllers and can easily interface with
TM
TL H 11015
are trademarks of National Semiconductor Corporation
TM
Features
Y
Y
Y
Y
Y
Y
Y
Y
Key Specifications
Y
Y
Y
Y
Y
Y
Y
Y
Serial digital data link requires few I O pins
Analog input track hold function
4- or 8-channel input multiplexer options with address
logic
On-chip 2 5V band-gap reference (
ture guaranteed)
No zero or full scale adjustment required
TTL CMOS input output compatible
0V to 5V analog input range with single 5V power
supply
Pin compatible with Industry-Standards ADC0831 4 8
Resolution
Conversion time (f
Power dissipation
Single supply
Total unadjusted error
Linearity Error (V
No missing codes (over temperature)
On-board Reference
REF
C
e
e
4 MHz)
2 5V)
g
a
g
2 5V
RRD-B30M75 Printed in U S A
2% over tempera-
LSB and
TL H 11015 – 4
December 1994
5 V
g
20 mW (Max)
1 5% (Max)
2 s (Max)
DC
g
g
(
g
1 LSB
8 Bits
5%)
LSB

Related parts for ADC08238CIN

ADC08238CIN Summary of contents

Page 1

... Remote sensing in noisy environments Y Disk drives Y Portable instrumentation Y Test systems Y ADC08238 Simplified Block Diagram TRI-STATE is a registered trademark of National Semiconductor Corporation COPS TM microcontrollers and MICROWIRE TM are trademarks of National Semiconductor Corporation C 1995 National Semiconductor Corporation TL H 11015 Features Serial digital data link requires few I O pins ...

Page 2

... Ordering Information ( ADC08231BIN ADC08231CIN ADC08234BIN ADC08234CIN ADC08234CIMF ADC08238BIN ADC08238CIN ADC08231BIWM ADC08231CIWM ADC08234BIWM ADC08234CIWM ADC08238BIWM ADC08238CIWM Connection Diagrams ADC08238 SO and DIP ADC08231 DIP ADC08231 SO Industrial Package N08E DIP N14A DIP MTB24 TSSOP N20A DIP M14B SO M14B SO M20B 11015– 11015– 11015– 26 ...

Page 3

... Total Unadjusted Error BIN BIWM CIN CIMF CIWM Differential Linearity R Reference Input Resistance REF V Analog Input Voltage IN Operating Ratings (Notes 1 3) Temperature Range ADC08231BIN ADC08231CIN ADC08234BIN ADC08234CIN 6 5V ADC08238BIN ADC08238CIN ADC08231BIWM ADC08231CIWM ADC08234BIWM ADC08238BIWM ADC08234CIWM ADC08238CIWM 800 mW ADC08234CIMF 1500V Supply Voltage (V 260 C 215 C ...

Page 4

Electrical Characteristics The following specifications apply for V CC specified Boldface limits apply for T A Symbol Parameter CONVERTER AND MULTIPLEXER CHARACTERISTICS (Continued) DC Common-Mode Error Power Supply Sensitivity On Channel Leakage Current (Note 13) Off Channel Leakage Current (Note ...

Page 5

Electrical Characteristics The following specifications apply for all other limits MIN MAX Symbol Parameter REFERENCE CHARACTERISTICS V OUT Output Voltage REF V T Temperature Coefficient REF V I ...

Page 6

Electrical Characteristics (Continued) The following specifications apply for V CC Boldface limits apply for MIN Symbol Parameter f Clock Frequency CLK Clock Duty Cycle (Note 14) T Conversion Time (Not Including C MUX ...

Page 7

Typical Performance Characteristics Linearity Error vs Reference Voltage Power Supply Current vs Temperature (ADC08238 ADC08234) Note For ADC08231 add I (Note 16) REF Spectral Response with 10 kHz Sine Wave Input Linearity Error vs Linearity Error vs Temperature Clock Frequency ...

Page 8

Typical Reference Performance Characteristics Load Regulation Output Drift Line Regulation vs Temperature (3 Typical Parts) (3 Typical Parts) Available Output Current vs Supply Voltage 11015 – 7 ...

Page 9

TRI-STATE Test Circuits and Waveforms Timing Diagrams To reset these devices CLK and CS must be simultaneously high for a period 11015 – 8 Data Input Timing or greater SELECT Data Output ...

Page 10

Timing Diagrams (Continued) LSB first output not available on ADC08231 LSB information is maintained for remainder of clock periods until CS goes high To reset the ADC08231 CLK and CS must be simultaneusly high for a period of t the ...

Page 11

Timing Diagrams (Continued) 11 ...

Page 12

ADC08238 Functional Block Diagram 12 ...

Page 13

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 dif- ferential analog input to be converted by a successive- approximation routine The actual voltage converted is ...

Page 14

Functional Description (Continued) TABLE II MUX Addressing ADC08238 (Continued) Differential MUX Mode MUX Address SGL ODD SELECT START DIF SIGN ...

Page 15

Functional Description (Continued) Since the input configuration is under software control it can be modified as required before each conversion A channel can be treated as a single-ended ground refer- enced input for one conversion then it can be reconfigured ...

Page 16

Functional Description (Continued) 3 When the start bit has been shifted into the start location of the MUX register the input channel has been assigned and a conversion is about to begin An interval of 1 clock periods is automatically ...

Page 17

Functional Description (Continued 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 ...

Page 18

Applications A ‘‘Stand-Alone’’ Hook-Up for ADC08238 Evaluation Pinouts shown for ADC08238 For all other products tie to pin functions as shown Low-Cost Remote Temperature Sensor 11015 – 21 ...

Page 19

Applications (Continued) Diodes are 1N914 Operating with Ratiometric Transducers 15 REF s Protecting the Input REF V 85 XDR s REF Span Adjust ...

Page 20

Applications (Continued) Zero-Shift and Span Adjust 11015 – ...

Page 21

Physical Dimensions inches (millimeters) Order Number ADC08231BIWM ADC08231CIWM Order Number ADC08238BIWM or ADC08238CIWM ADC08234BIWM or ADC08234CIWM NS Package Number M14B NS Package Number M20B 21 ...

Page 22

Physical Dimensions inches (millimeters) (Continued) Order Number ADC08231BIN or ADC08231CIN TSSOP Molded Package Order Number ADC08234CIMF NS Package Number MTB24 NS Package Number N08E 22 ...

Page 23

Physical Dimensions inches (millimeters) (Continued) Order Number ADC08234BIN or ADC08234CIN Molded Dual-In-Line Package (N) NS Package Number N14A 23 ...

Page 24

... Physical Dimensions inches (millimeters) (Continued) Order Number ADC08238CIN or ADC08238BIN 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 OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...

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