AD7937

更新时间： 2024-11-26 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	158K
描述
LC2MOS 8+4 Loading Dual 12-Bit DAC

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中文翻译

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数据手册

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AD7937 数据手册

LC²MOS

(8+4) Loading Dual 12-Bit DAC

AD7937

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Two 12-Bit DACs in One Package

DAC Ladder Resistance Matching: 0.5%

Surface-Mount Package

4-Quadrant Multiplication

Low Gain Error (3 LSB max Over Temperature)

Byte Loading Structure

AD7937

DAC A MS

DAC A LS

INPUT REG

Fast Interface Timing

DAC A REGISTER

APPLICATIONS

UPD

Automatic Test Equipment

Programmable Filters

Audio Applications

Synchro Applications

Process Control

OUTA

DAC A

AGNDA

FBA

REFA

CONTROL

LOGIC

REFB

FBB

OUTB

DAC B

GENERAL DESCRIPTION

AGNDB

The AD7937 contains two 12-bit current output DACs on one

monolithic chip. A separate reference input is provided for each

DAC. The dual DAC saves valuable board space, and the mono-

lithic construction ensures excellent thermal tracking. Both DACs

are guaranteed 12-bit monotonic over the full temperature range.

CLR

DAC B REGISTER

DAC B LS

INPUT REG

DAC B MS

INPUT REG

The AD7937 has a 2-byte (eight LSBs, four MSBs) loading

structure. It is designed for right-justified data format. The control

signals for register loading are A0, A1, CS, WR, and UPD. Data

is loaded to the input registers when CS and WR are low. To

transfer this data to the DAC registers, UPD must be taken

low with WR.

DB7–DB0

DGND

PRODUCT HIGHLIGHTS

1. DAC-to-DAC Matching

Since both DACs are fabricated on the same chip, precise

matching and tracking is inherent. Many applications that are

not practical using two discrete DACs are now possible.

Typical matching: 0.5%.

Added features on the AD7937 include an asynchronous CLR

line which is very useful in calibration routines. When this is

taken low, all registers are cleared. The double buffering of the

data inputs allows simultaneous update of both DACs. Also,

each DAC has a separate AGND line. This increases the device

versatility; for instance, one DAC may be operated with AGND

biased while the other is connected in the standard configuration.

2. Small Package Size

The AD7937 is packaged in a small 24-lead SOIC.

3. Wide Power Supply Tolerance

The AD7937 is manufactured using the Linear Compatible

CMOS (LC²MOS) process. It is speed compatible with most

microprocessors and accepts TTL, 74HC, and 5 V CMOS logic

level inputs.

The device operates on a 5 V V_DD, with 10% tolerance on

this nominal figure. All specifications are guaranteed over

this range.

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: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7 8

中文翻译

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与AD7937相关器件

型号	品牌	获取价格	描述	数据表
AD7937AR	ADI	获取价格	LC2MOS 8+4 Loading Dual 12-Bit DAC
AD7937BR	ADI	获取价格	LC2MOS 8+4 Loading Dual 12-Bit DAC
AD7937BR-REEL	ADI	获取价格	IC DUAL, PARALLEL, 8 BITS INPUT LOADING, 0.6 us SETTLING TIME, 12-BIT DAC, PDSO24, SOIC-24
AD7937BR-REEL7	ADI	获取价格	IC DUAL, PARALLEL, 8 BITS INPUT LOADING, 0.6 us SETTLING TIME, 12-BIT DAC, PDSO24, SOIC-24
AD7937BRZ	ADI	获取价格	IC DUAL, PARALLEL, 8 BITS INPUT LOADING, 0.6 us SETTLING TIME, 12-BIT DAC, PDSO24, SOIC-24
AD7938	ADI	获取价格	8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7938_15	ADI	获取价格	8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7938-6	ADI	获取价格	8-Channel, 625 kSPS, 12-Bit Parallel ADCs with a Sequencer
AD7938-6BCP	ADI	获取价格	暂无描述
AD7938-6BSU	ADI	获取价格	暂无描述

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