ADC9708 datasheet(6/8 Pages) NSC

Numer części	ADC9708

Szczegółowy opis	6-Channel 8-Bit uP Compatible A/D Converter

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Typical Applications (Continued)

3 The auto-zeroauto-full-scale (See

Figures 5 – 8 ) should

use double precision rounded (as opposed to truncated)

arithmatic Several points are worth noting

a The subtractions are single op code instructions

b The full scale correction uses a multiply by 256 and

can be accomplished by a shift left 8 bits (usually one

instruction) or placing (N b NZ) in the MSB register

and setting the LSB register to zero for the double

precision divide

c The divisor (NFS b NZ) of the MSB register will al-

ways be zero

These schemes have the following advantages

a No access to the data bus or address bus is required

by the AD system

b 5 IO bits completely support the AD system

c Since auto full scaleauto zero are implemented in

software and long term drift (aging) effects are elimi-

nated

d Software overhead is minimal (typically 30 bytes)

e Where ratiometric operation is permissible the 4 exter-

nal components may be g5% tolerance including the

power supply

TLH10409 – 11

Note D

VI e (Applied Force) and can be Linearized (if necessary) in Software

FIGURE 9 Ratiometric Strain Gage SensoreController

TLH10409 – 12

Applications

Beverage BrewersDispensers

Ramp Current e IR e VCC a

R1

R1 a R2

J 1R

3

J

Chemical Solution Control

Automatic Liquid Mixing Control

VI e

RX

RX a RB

J VCCa

Ramp Time e VI

CHI

R

J e RX

RX a RB

J1aR2R

1

JCHR3J

FIGURE 10

6

Podobny numer części - ADC9708

Producent	Numer części	Arkusz danych	Szczegółowy opis
List of Unclassifed Man...	ADC908AX	859Kb / 12P	CMOS MICROPROCESSOR - COMPATIBLE FAST 8 - BIT A/D CONVERTER
	ADC908BX	859Kb / 12P	CMOS MICROPROCESSOR - COMPATIBLE FAST 8 - BIT A/D CONVERTER
	ADC908EX	859Kb / 12P	CMOS MICROPROCESSOR - COMPATIBLE FAST 8 - BIT A/D CONVERTER
	ADC908FP	859Kb / 12P	CMOS MICROPROCESSOR - COMPATIBLE FAST 8 - BIT A/D CONVERTER
	ADC908FS	859Kb / 12P	CMOS MICROPROCESSOR - COMPATIBLE FAST 8 - BIT A/D CONVERTER

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Podobny opis - ADC9708

Producent	Numer części	Arkusz danych	Szczegółowy opis
National Semiconductor ...	UA9708	203Kb / 6P	6-CHANNEL 8-BIT uP COMPATIBLE A/D CONVERTER
Fujitsu Component Limit...	MB4053	135Kb / 17P	6-Channel 8-BIT A/D Converter
National Semiconductor ...	ADC080X	2Mb / 3P	8 BIT UP COMPATIBLE A/D CONVERTERS
	ADC0801	1Mb / 41P	8-Bit uP Compatible A/D Converters
	ADC0808	264Kb / 14P	8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
List of Unclassifed Man...	ZN448	289Kb / 18P	8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER
National Semiconductor ...	ADC0841	380Kb / 16P	8-Bit P Compatible A/D Converter
NXP Semiconductors	NE5018	69Kb / 6P	8-Bit mp-compatible D/A converter August 31, 1994
National Semiconductor ...	ADC0808	394Kb / 16P	8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
National Semiconductor ...	ADC0808	348Kb / 14P	8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer

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ADC9708 Arkusz danych(PDF) 6 Page - National Semiconductor (TI)

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