AD7111A

更新时间： 2024-09-23 22:38:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
8页	177K
描述
LC2MOS LOGDAC Logarithmic D/A Converter

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AD7111A 数据手册

LC MOS LOGDAC

Logarithmic D/A Converter

AD7111/AD7111A

FUNCTIO NAL BLO CK D IAGRAMS

FEATURES

Dynam ic Range: 88.5 dB

Resolution: 0.375 dB

On-Chip Data Latches

+5 V Operation

AD7111A Pin Com patible w ith AD7524

Low Pow er

AD7111

OUT

17-BIT DAC

AGND

APPLICATIONS

Audio Attenuators

17-BIT LATCH

Sonar System s

Function Generators

Digitally Controlled AGC System

DECODE LOGIC

8-BIT BUFFER

CONTROL LOGIC

GENERAL D ESCRIP TIO N

T he LOGDAC AD7111/AD7111A are monolithic multiplying

D/A converters featuring wide dynamic range in a small pack-

age. Both DACs can attenuate an analog input signal over the

range 0 dB to 88.5 dB in 0.375 dB steps. T hey are available in

16-pin DIPs and SOIC packages. T he AD7111 is also available

in a 20-terminal LCCC package.

D0 – D7

DGND

T he degree of attenuation across the DAC is determined by an

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

is decoded into a 17-bit word which is then applied to a 17-bit

R-2R ladder. T he very fine step resolution, which is available

over the entire dynamic range, is due to the use of this 17-bit

DAC.

AD7111A

OUT

17-BIT DAC

AGND

17-BIT LATCH

T he AD7111/AD7111A are easily interfaced to a standard 8-bit

MPU bus via an 8-bit data port and standard microprocessor

control lines. T he AD7111 WR input is edge triggered and re-

quires a rising edge to load new data to the DAC. T he AD7111A

WR is level triggered to allow transparent operation of the

latches, if required. It should also be noted that the AD7111A is

exactly pin and function-compatible with the AD7524, an in-

dustry standard 8-bit multiplying DAC. T his allows an easy up-

grading of existing AD7524 designs which would benefit both

from the wider dynamic range and the finer step resolution of-

fered by the AD7111A.

DECODE LOGIC

8-BIT BUFFER

CONTROL LOGIC

D0 – D7

DGND

P RO D UCT H IGH LIGH TS

1. Wide Dynamic Range: 0 dB to 88.5 dB attenuation range in

0.375 dB steps.

T he AD7111/AD7111A are fabricated in Linear Compatible

CMOS (LC²MOS), an advanced, mixed technology process that

combines precision bipolar circuits with low power CMOS logic.

2. Small Package: T he AD7111/AD7111A are available in

16-pin DIPs and SOIC packages.

3. T ransparent Latch Operation: By tying the CS and WR in-

puts low, the DAC latches in the AD7111A can be made

transparent.

LOGDAC is a registered trademark of Analog Devices, Inc.

4. Fast Microprocessor Interface: Data setup times of 25 ns and

write pulse width of 57 ns make the AD7111A compatible

with modern microprocessors.

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 8

中文翻译

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与AD7111A相关器件

型号	品牌	获取价格	描述	数据表
AD7111ABCHIPS	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, UUC, DIE, Digital to Analog Converter
AD7111ABN	ADI	获取价格	LC2MOS LOGDAC Logarithmic D/A Converter
AD7111ABN	ROCHESTER	获取价格	PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDIP16, PLASTIC, DIP-16
AD7111ABR	ADI	获取价格	LC2MOS LOGDAC Logarithmic D/A Converter
AD7111ABR	ROCHESTER	获取价格	PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO16, SOIC-16
AD7111ABR-REEL	ADI	获取价格	暂无描述
AD7111ABRZ	ADI	获取价格	暂无描述
AD7111ABRZ-REEL	ADI	获取价格	Monolithic Multiplying DAC Featuring Wide Dynamic Range
AD7111ACN	ADI	获取价格	LC2MOS LOGDAC Logarithmic D/A Converter
AD7111ACNZ	ADI	获取价格	IC PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDIP16, PLASTIC, DIP-16, Digital to Analog C

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