ADC0841CCN National Semiconductor, ADC0841CCN Datasheet

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ADC0841CCN

Manufacturer Part Number
ADC0841CCN
Description
8-Bit Microprocessor Compatible A/D Converter
Manufacturer
National Semiconductor
Datasheet

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© 1999 National Semiconductor Corporation
ADC0841
8-Bit µP Compatible A/D Converter
General Description
The ADC0841 is a CMOS 8-bit successive approximation
A/D converter. Differential inputs provide low frequency input
common mode rejection and allow offsetting the analog
range of the converter. In addition, the reference input can
be adjusted enabling the conversion of reduced analog
ranges with 8-bit resolution.
The A/D is designed to operate with the control bus of a va-
riety of microprocessors. TRI-STATE
rectly drive the data bus permit the A/D to be configured as
a memory location or I/O device to the microprocessor with
no interface logic necessary.
Features
n Easy interface to all microprocessors
Block and Connection Diagrams
(N.C.-No Connection)
TRI-STATE
NSC800
is a trademark of National Semiconductor Corporation.
®
is a registered trademark of National Semiconductor Corporation.
Dual-In-Line Package (N)
Top View
DS008557-2
®
output latches that di-
DS008557
n Operates ratiometrically or with 5 V
n No zero or full-scale adjust required
n Internal clock
n 0V to 5V input range with single 5V power supply
n 0.3" standard width 20-pin package
n 20 Pin Molded Chip Carrier Package
Key Specifications
n Resolution: 8 Bits
n Total Unadjusted Error:
n Single Supply: 5 V
n Low Power: 15 mW
n Conversion Time: 40 µs
Molded Chip Carrier Package (V)
DC
Top View
±
1
2
LSB and
DS008557-1
DC
DS008557-3
voltage reference
±
1 LSB
www.national.com
May 1998

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ADC0841CCN Summary of contents

Page 1

... Features n Easy interface to all microprocessors Block and Connection Diagrams Dual-In-Line Package (N) DS008557-2 (N.C.-No Connection) Top View TRI-STATE ® registered trademark of National Semiconductor Corporation. NSC800 ™ trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS008557 n Operates ratiometrically or with 5 V voltage reference DC ...

Page 2

... ADC0841BCV, ADC0841CCV Conditions Typ (Note 6) (Note 7) DC 2.4 2.4 V GND−0.05 ± 1/16 ± ± unless otherwise specified. Boldface limits apply from T DC ADC0841BCN, ADC0841CCN ADC0841BCV, ADC0841CCV Conditions Typ (Note 6) = 5.25V 4.75V 5.0V V 0.005 IN 2 260˚C 215˚C 220˚C ...

Page 3

... Note 8: Design limits are guaranteed but not 100% production tested. These limits are not used to calculate outgoing quality levels. Note 9: The temperature coefficient is 0.3%/˚C. Note 10: Human body model, 100 pF discharged through 1.5 k (Continued unless otherwise specified. Boldface limits apply from T DC ADC0841BCN, ADC0841CCN ADC0841BCV, ADC0841CCV Conditions Typ (Note − ...

Page 4

Timing Diagram Note 11: Read strobe must occur at least 600 ns after the assertion of interrupt to guarantee reset of INTR. Typical Performance Characteristics Logic Input Threshold Voltage vs Supply Voltage DS008557-23 Linearity Error vs V REF DS008557-26 www.national.com ...

Page 5

Typical Performance Characteristics Unadjusted Offset Error vs V Voltage REF DS008557-22 TRI-STATE Test Circuits and Waveforms t 1H DS008557 DS008557-7 (Continued DS008557 ...

Page 6

Functional Block Diagram www.national.com 6 DS008557-10 ...

Page 7

Functional Description A conversion is initiated via the CS and WR lines. If the data from a previous conversion is not read, the INTR line will be low. The falling edge of WR will reset the INTR line high and ...

Page 8

Applications Information DS008557-11 a) Ratiometric The full-scale adjustment should be made [with the proper V (−) voltage applied] by forcing a voltage to the V IN put which is given by: = the high end of the analog input range ...

Page 9

Applications Information (Continued) Protecting the Input Diodes are 1N914 Span Adjust DS008557-14 High Accuracy Comparator > all (+) V (− < all (+) V ...

Page 10

Applications Information Operating with Automotive Ratiometric Transducers (− XDR CC SAMPLE PROGRAM FOR ADC0841 — INS8039 INTERFACE CONVERTING TWO RATIOMETRIC, DIFFERENTIAL SIGNALS 0000 04 10 0010 ...

Page 11

Applications Information (Continued) 0050 99 FE CONV: 0052 91 0053 09 LOOP: 0054 32 53 0056 81 0057 89 01 0059 A0 005A 83 ;CONVERSION SUBROUTINE ;ENTRY: ACC — A/D MUX DATA ;EXIT: ACC — CONVERTED DATA ORG 50H ANL ...

Page 12

Applications Information SAMPLE PROGRAM FOR ADC0841 — NSC800 INTERFACE 0010 NCONV 000F DEL 001F CS 3C00 ADDTA 0000' 00 DTA: 0001 START: 0003 0005' 21 0000' 0008' 11 003C 000B STCONV: 000D' EB 000E' ...

Page 13

... Ordering Information Temperature Range 0˚C to +70˚C ADC0841BCN −40˚C to +85˚C ADC0841BCV Total Unadjusted Error ± ± 1 ⁄ LSB 1 LSB 2 ADC0841CCN N20A Molded Dip ADC0841CCV V20A Molded Chip Carrier 13 Package Outline www.national.com ...

Page 14

14 ...

Page 15

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number ADC0841BCN or ADC0841CCN Order Number ADC0841BCV or ADC0841CCV Molded Dual-In-Line Package (N) NS Package Number N20A Molded Chip Carrier Package (V) NS Package Number V20A 15 www.national.com ...

Page 16

... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 ...

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