ADC912AFS

更新时间： 2024-01-05 07:05:45

品牌	Logo	应用领域
亚德诺 - ADI		转换器微处理器
页数	文件大小	规格书
16页	235K
描述
CMOS Microprocessor-Compatible 12-Bit A/D Converter

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中文翻译

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数据手册

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ADC912AFS 数据手册

CMOS Microprocessor-Compatible

12-Bit A/D Converter

ADC912A

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Low Cost

AGND

REFIN

Low Transition Noise between Code

12-Bit Accurate

؎1/2 LSB Nonlinearity Error over Temperature

No Missing Codes at All Temperatures

10 ␮s Conversion Time

5k⍀

12-BIT DAC

ADC912A

SUCCESSIVE

APPROXIMATION

Internal or External Clock

8- or 16-Bit Data Bus Compatible

Improved ESD Resistant Design

Latchup Resistant Epi-CMOS Processing

Low 95 mW Power Consumption

Space-Saving 24-Lead 0.3" DIP, or 24-Lead SOIC

12-BIT LATCH

BUSY

CONTROL

LOGIC

MULTIPLEXER

HBEN

APPLICATIONS

CLK OUT

CLK IN

THREE-STATE

OUTPUT

DRIVERS

THREE-STATE

OUTPUT

Data Acquisition Systems

DSP System Front End

Process Control Systems

Portable Instrumentation

CLOCK

OSCILLATOR

DRIVERS

DGND D D

3/11 0/8

GENERAL DESCRIPTION

not located at a transition voltage, see Figures 1 and 2. NPN

digital output transistors provide excellent bus interface timing,

125 ns access and bus disconnect time which results in faster

data transfer without the need for wait states. An external

1.25 MHz clock provides a 10 µs conversion time.

The ADC912A is a monolithic 12-bit accurate CMOS A/D

converter. It contains a complete successive-approximation A/D

converter built with a high-accuracy D/A converter, a precision

bipolar transistor high-speed comparator, and successive-

approximation logic including three-state bus interface for logic

compatibility. The accuracy of the ADC912A results from the

addition of precision bipolar transistors to Analog Devices’

advanced-oxide isolated silicon-gate CMOS process. Particular

attention was paid to the reduction of transition noise between

adjacent codes achieving a 1/6 LSB uncertainty. The low noise

design produces the same digital output for dc analog inputs

In stand-alone applications an internal clock can be used with

external crystal.

An external negative five-volt reference sets the 0 V to 10 V

input range. Plus 5 V and minus 12 V power supplies result in

95 mW of total power consumption.

256

256 SUCCESSIVE

CONVERSIONS

100

WITH

192

128

= 4.99756V

TRANSITION NOISE

2045 2046 2047 2048 2049

OUTPUT CODE – Decimal

ANALOG INPUT

Figure 2. Transition Noise Cross Plot

Figure 1. Code Repetition

REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

12 3 4 5 6 7...16

中文翻译

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与ADC912AFS相关器件

型号	品牌	获取价格	描述	数据表
ADC912AFW	ADI	获取价格	IC 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP24, 0.300 INCH, CERDIP-24, An
ADC912BIFS	ADI	获取价格	IC 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO24, SOL-24, Analog to Di
ADC912BW/883	ADI	获取价格	SUCCESSIVE APPROXIMATION ADC, ACCESS, CDIP24
ADC912BW883C	ADI	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP24, 0.300 INCH, CERDIP-24
ADC912EP	ADI	获取价格	SUCCESSIVE APPROXIMATION ADC, ACCESS, PDIP24
ADC912FS	ADI	获取价格	SUCCESSIVE APPROXIMATION ADC, ACCESS, PDSO24
ADC912HP	ADI	获取价格	SUCCESSIVE APPROXIMATION ADC, ACCESS, PDIP24
ADC-914MC	ETC	获取价格	Analog-to-Digital Converter， 14-Bit
ADC-914MM	ETC	获取价格	Analog-to-Digital Converter， 14-Bit
ADC922AT	ADI	获取价格	SUCCESSIVE APPROXIMATION ADC, ACCESS, CDIP28

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