AD7225

更新时间： 2024-09-19 22:38:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	340K
描述
LC2MOS Quad 8-Bit DAC with Separate Reference Inputs

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AD7225 数据手册

LC MOS Quad 8-Bit DAC

with Separate Reference Inputs

AD7225

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Four 8-Bit DACs w ith Output Am plifiers

Separate Reference Input for Each DAC

␮P Com patible w ith Double-Buffered Inputs

Sim ultaneous Update of All Four Outputs

Operates w ith Single or Dual Supplies

Extended Tem perature Range Operation

No User Trim s Required

Skinny 24-Pin DIP, SOIC and 28-Term inal Surface

Mount Packages

GENERAL D ESCRIP TIO N

T he AD7225 contains four 8-bit voltage output digital-to-

analog converters, with output buffer amplifiers and interface

logic on a single monolithic chip. Each D/A converter has a

separate reference input terminal. No external trims are re-

quired to achieve full specified performance for the part.

P RO D UCT H IGH LIGH TS

1. DACs and Amplifiers on CMOS Chip

T he single-chip design of four 8-bit DACs and amplifiers al-

lows a dramatic reduction in board space requirements and

offers increased reliability in systems using multiple convert-

ers. Its pinout is aimed at optimizing board layout with all

analog inputs and outputs at one end of the package and all

digital inputs at the other.

T he double-buffered interface logic consists of two 8-bit regis-

ters per channel–an input register and a DAC register. Control

inputs A0 and A1 determine which input register is loaded when

WR goes low. Only the data held in the DAC registers deter-

mines the analog outputs of the converters. T he double-

buffering allows simultaneous update of all four outputs under

control of LDAC. All logic inputs are T T L and CMOS (5 V)

level compatible and the control logic is speed compatible with

most 8-bit microprocessors.

2. Single or Dual Supply Operation

T he voltage-mode configuration of the AD7225 allows single

supply operation. T he part can also be operated with dual

supplies giving enhanced performance for some parameters.

Specified performance is guaranteed for input reference voltages

from +2 V to +12.5 V when using dual supplies. T he part is also

specified for single supply operation using a reference of +10 V.

Each output buffer amplifier is capable of developing +10 V

across a 2 kΩ load.

3. Versatile Interface Logic

T he AD7225 has a common 8-bit data bus with individual

DAC latches, providing a versatile control architecture for

simple interface to microprocessors. T he double-buffered in-

terface allows simultaneous update of the four outputs.

T he AD7225 is fabricated on an all ion-implanted high-speed

Linear Compatible CMOS (LC²MOS) process which has been

specifically developed to integrate high speed digital logic cir-

cuits and precision analog circuitry on the same chip.

4. Separate Reference Input for Each DAC

T he AD7225 offers great flexibility in dealing with input sig-

nals with a separate reference input provided for each DAC

and each reference having variable input voltage capability.

REV. B

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AD7225相关器件

型号	品牌	获取价格	描述	数据表
AD7225BQ	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225BQ	MAXIM	获取价格	D/A Converter, 4 Func, CDIP24,
AD7225BRS	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225BRS-REEL	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225BRSZ	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225CQ	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225CQ	MAXIM	获取价格	D/A Converter, 4 Func, CDIP24
AD7225CRS	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225CRS-REEL	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
AD7225CRSZ	ADI	获取价格	LC2MOS Quad 8-Bit DAC with Separate Reference Inputs

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