AD7247A

更新时间： 2024-11-18 22:47:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	394K
描述
LC2MOS Dual 12-Bit DACPORTs

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AD7247A 数据手册

LC²MOS

Dual 12-Bit DACPORTs

AD7237A/AD7247A

FUNCTIONAL BLOCK DIAGRAMS

FEATURES

Complete Dual 12-Bit DAC Comprising

Two 12-Bit CMOS DACs

On-Chip Voltage Reference

Output Amplifiers

Reference Buffer Amplifiers

Improved AD7237/AD7247:

12 V to 15 V Operation

Faster Interface –30 ns typ Data Setup Time

Parallel Loading Structure: AD7247A

(8+4) Loading Structure: AD7237A

Single or Dual Supply Operation

Low Power—165 mW typ in Single Supply

GENERAL DESCRIPTION

The AD7237A/AD7247A is an enhanced version of the industry

standard AD7237/AD7247. Improvements include operation

from 12 V to 15 V supplies, faster interface times and better

reference variations with V_DD. Additional features include faster

settling times.

The AD7237A/AD7247A is a complete, dual, 12-bit, voltage

output digital-to-analog converter with output amplifiers and

Zener voltage reference on a monolithic CMOS chip. No exter-

nal user trims are required to achieve full specified performance.

Both parts are microprocessor compatible, with high speed data

latches and interface logic. The AD7247A accepts 12-bit paral-

lel data which is loaded into the respective DAC latch using the

WR input and a separate Chip Select input for each DAC. The

AD7237A has a double buffered interface structure and an 8-bit

wide data bus with data loaded to the respective input latch in

two write operations. An asynchronous LDAC signal on the

AD7237A updates the DAC latches and analog outputs.

A REF OUT/REF IN function is provided which allows either

the on-chip 5 V reference or an external reference to be used as

a reference voltage for the part. For single supply operation, two

output ranges of 0 V to +5 V and 0 V to +10 V are available,

while these two ranges plus an additional ±5 V range are avail-

able with dual supplies. The output amplifiers are capable of de-

veloping +10 V across a 2 kΩ load to GND.

PRODUCT HIGHLIGHTS

1. The AD7237A/AD7247A is a dual 12-bit DACPORT^®on a

single chip. This single chip design and small package size

offer considerable space saving and increased reliability over

multichip designs.

The AD7237A/AD7247A is fabricated in Linear Compatible

CMOS (LC²MOS), an advanced, mixed technology process

that combines precision bipolar circuits with low power CMOS

logic. Both parts are available in a 24-pin, 0.3" wide plastic and

hermetic dual-in-line package (DIP) and are also packaged in a

24-lead small outline (SOIC) package.

2. The improved interface times of the parts allow easy, direct

interfacing to most modern microprocessors, whether they

have 8-bit or 16-bit data bus structures.

3. The AD7237A/AD7247A features a wide power supply

range allowing operation from 12 V supplies.

DACPORT is a registered trademark of Analog Devices, Inc.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

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

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

which 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: 617/329-4700

Fax: 617/326-8703

12 3 4 5 6 7...12

中文翻译

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与AD7247A相关器件

型号	品牌	获取价格	描述	数据表
AD7247AAN	ADI	获取价格	LC2MOS Dual 12-Bit DACPORTs
AD7247AANZ	ADI	获取价格	Dual 12-Bit DACPORT with Parallel Load
AD7247AAR	ADI	获取价格	LC2MOS Dual 12-Bit DACPORTs
AD7247AAR	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDSO24, SOIC-24
AD7247AAR-REEL	ADI	获取价格	Dual 12-Bit DACPORT with Parallel Load
AD7247AAR-REEL7	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDSO24, SOIC-24
AD7247AARZ	ADI	获取价格	Dual 12-Bit DACPORT with Parallel Load
AD7247AARZ-REEL	ADI	获取价格	Dual 12-Bit DACPORT with Parallel Load
AD7247AARZ-REEL7	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDSO24, ROHS COMPLIANT
AD7247ABN	ADI	获取价格	LC2MOS Dual 12-Bit DACPORTs

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