Datasheet > ZN449

ZN449

更新时间： 2024-11-24 22:06:51

品牌	Logo	应用领域
其他 - ETC		转换器微处理器
页数	文件大小	规格书
18页	291K
描述
8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER

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中文翻译

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数据手册

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ZN449 数据手册

DS3013 - 2.2

ZN448/ZN449

8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER

The ZN448 and ZN449 are 8-bit successive

approximation A-D converters designed to be easily

interfacedtomicroprocessors. Allactivecircuitryiscontained

on-chip including a clock generator and stable 2.5V bandgap

reference, control logic and double buffered latches with

reference.

BUSY (END OF CONVERSION)

RD (OUTPUT ENABLE)

CLOCK

18 DB

17 DB

16 DB

15 DB

(LSB)

WR (START CONVERSION)

Only a reference resistor and capacitor, clock resistor and

capacitor and input resistors are required for operation with

either unipolar or bipolar input voltage.

EXT

REF IN

REF OUT

14 DB

13 DB

12 DB

11 DB

(MSB)

FEATURES

■

Easy Interfacing to Microprocessor, or operates as a

GROUND

10 +VCC (+5V)

'Stand-Alone' Converter

ZN448/9E (DP18)

■

Fast: 9 microseconds Conversion time Guaranteed

Choice of Linearity: 0.5 LSB - ZN448, 1 LSB - ZN449

On-Chip Clock

Choice of On-Chip or External Reference Voltage

Unipolar or Bipolar Input Ranges

BUSY (END OF CONVERSION)

(LSB)

RD (OUTPUT ENABLE)

CLOCK

Commercial Temperature Range

WR (START CONVERSION)

ORDERING INFORMATION

EXT

REF IN

REF OUT

Linearity

error (LSB) temperature

Operating

Device type

Package

ZN448E

ZN449D

ZN449E

0.5

0°C to +70°C

DP18

MP18

DP18

(MSB)

GROUND

+VCC (+5V)

ZN449D (MP18)

Fig.1 Pin connection - top view

COMPARATOR

ANALOGUE

EXT

INPUT

8-BIT DAC

REF

OUT

REF

CLOCK

CK RC OR

2.5V

REFERENCE

GENERATOR

EXT CLOCK

INTERFACE

AND

CONTROL

LOGIC

SUCCESSIVE

APPROXIMATION REGISTER

GROUND

BUSY

(+5V)

3-STATE BUFFERS

Fig.2 System diagram

12 3 4 5 6 7...18

中文翻译

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