AD7112*

更新时间： 2024-09-23 23:27:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
12页	232K
描述
LC2MOS LOGDAC Dual Logarithmic D/A Converter

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AD7112* 数据手册

LC MOS LOGDAC

Dual Logarithmic D/A Converter

AD7112*

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Dynam ic Range: 88.5 dB

Resolution: 0.375 dB

On-Chip Data Latches for Both DACs

Four-Quadrant Multiplication

+5 V Operation

OUT A

17-BIT DAC A

AD7112

Pin Com patible w ith AD7528

Low Pow er

17-BIT LATCH

APPLICATIONS

Audio Attenuators

Sonar System s

DB0

DB7

8-BIT

BUFFER

DECODE LOGIC

17-BIT LATCH

Function Generators

OUT B

CONTROL

LOGIC

17-BIT DAC B

DGND

DAC A/

CS WR

AGND

DAC B

GENERAL D ESCRIP TIO N

T he LOGDAC® AD7112 is a monolithic dual multiplying D/A

converter featuring wide dynamic range and excellent DAC-to-

DAC matching. Both DACs can attenuate an analog input sig-

nal over the range 0 dB to 88.5 dB in 0.375 dB steps. It is

available in skinny 0.3" wide 20-pin DIPs and in 20-terminal

surface mount packages.

P RO D UCT H IGH LIGH TS

1. DAC-to-DAC Matching: Since both of the AD7112 DACs

are fabricated at the same time on the same chip, precise

matching and tracking between the two DACs is inherent.

2. Small Package: T he AD7112 is available in a 20-pin DIP

and a 20-terminal SOIC package.

T he degree of attenuation in either channel is determined by the

8-bit word applied to the onboard decode logic. T his 8-bit word

is decoded into a 17-bit word which is then loaded into one of

the 17-bit data latches, determined by DACA/DACB. T he fine

step resolution over the entire dynamic range is due to the use of

these 17-bit DACs.

3. Fast Microprocessor Interface: T he AD7112 has bus inter-

face timing compatible with all modern microprocessors.

T he AD7112 is easily interfaced to a standard 8-bit MPU bus

via an 8-bit data port and standard microprocessor control lines.

It should be noted that the AD7112 is exactly pin-compatible

with the AD7528, an industry standard dual 8-bit multiplying

DAC. T his allows an easy upgrading of existing AD7528 de-

signs which would benefit both from the wider dynamic range

and the finer step resolution offered by the AD7112.

T he AD7112 is fabricated in Linear Compatible CMOS

(LC²MOS), an advanced, mixed technology process that com-

bines precision bipolar circuits with low power CMOS logic.

*P r otected by U.S. P atent No. 4521764.

LO GD AC is a r egister ed tr adem ar k of Analog D evices, Inc.

REV. 0

Inform ation furnished by Analog Devices is believed to be accurate and

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

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 617/ 329-4700

Fax: 617/ 326-8703

12 3 4 5 6 7...12

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与AD7112*相关器件

型号	品牌	获取价格	描述	数据表
AD7112BN	ADI	获取价格	LC2MOS LOGDAC Dual Logarithmic D/A Converter
AD7112BNZ	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDIP20, 0.300 INCH, PLASTIC, DIP-20, Digital
AD7112BR	ADI	获取价格	LC2MOS LOGDAC Dual Logarithmic D/A Converter
AD7112BRZ	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20, SOIC-20, Digital to Analog Converter
AD7112CN	ADI	获取价格	LC2MOS LOGDAC Dual Logarithmic D/A Converter
AD7112CNZ	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDIP20, 0.300 INCH, PLASTIC, DIP-20, Digital
AD7112CR	ADI	获取价格	LC2MOS LOGDAC Dual Logarithmic D/A Converter
AD7112CR-REEL	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20, SOIC-20, Digital to Analog Converter
AD7112CRZ	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20, SOIC-20, Digital to Analog Converter
AD7112CRZ-REEL	ADI	获取价格	IC DUAL, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20, SOIC-20, Digital to Analog Con

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