AD7769

更新时间： 2024-09-28 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	267K
描述
LC2MOS Analog I/O Port

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AD7769 数据手册

LC MOS

Analog I/O Port

AD7769

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Tw o-Channel, 8-Bit 2.5 ␮s ADC

Tw o 8-Bit, 2.5 ␮s DACs w ith Output Am plifiers

Span and Offset of ADC and DAC

Independently Adjustable

Low Pow er

APPLICATIONS

Winchester Disk Servo Controllers

Floppy Disk Microstepping

Closed Loop Servo System s

GENERAL D ESCRIP TIO N

T he AD7769 is a complete, two-channel, 8-bit, analog I/O port.

It has versatile input and output signal conditioning features

that make it ideal for use in head-positioning servos in Winches-

ter disk systems. It is equally suitable for floppy disk microstep-

ping head positioning, other closed loop digital servo systems

and general purpose 8-bit data acquisition.

P RO D UCT H IGH LIGH TS

1. T wo-Channel, 8-Bit Analog I/O port on a Single Chip.

T he AD7769 contains a two-channel, high speed ADC with

input signal conditioning and two, fast settling 8-bit DACs

with output amplifiers, on a single chip.

T he AD7769 contains a high speed successive approximation

ADC, preceded by a two-channel multiplexer and signal condi-

tioning circuits. T he input span of the ADC and the offset of

the zero point from ground can be independently set by apply-

ing ground referenced voltages. T he AD7769 also contains two

independent, fast settling, 8-bit DACs with output amplifiers.

T he output span and offset voltage of the DACs can be set inde-

pendently of those of the ADC. T his makes the AD7769 espe-

cially useful in disk drives, where only a positive supply rail is

available and the ranges of the ADC and DACs must be refer-

enced to some positive voltage less than the supply.

2. Independent Control of Span and Offset.

T he input voltage span of the ADC and the midpoint of the

transfer function, the output voltage swing of the two DACs

and the half-scale output voltage, can be set independently

by applying ground referenced control voltages.

3. Dynamic Specifications for DSP Users.

In addition to the traditional ADC and DAC specifications,

the AD7769 is specified with ac parameters including signal-

to-noise ratio, distortion and signal bandwidth.

4. Fast Microprocessor Interface.

T he AD7769 is easily interfaced to a standard 8-bit mpu bus via

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

T he AD7769 has bus interface timing compatible with all

modern microprocessors, with bus access and relinquish

times less than 65 ns and a Write pulse width less than 90 ns.

T he AD7769 is fabricated in Linear Compatible CMOS

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

bines precision bipolar circuits with low power CMOS logic.

T he part is available in a 28-lead plastic DIP and 28-terminal

PLCC package.

REV. A

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 World Wide Web Site: http:/ / w w w .analog.com Fax:

617/ 326-8703

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与AD7769相关器件

型号	品牌	获取价格	描述	数据表
AD7769AN	ADI	获取价格	LC2MOS Analog I/O Port
AD7769AP	ADI	获取价格	LC2MOS Analog I/O Port
AD7769JN	ADI	获取价格	LC2MOS Analog I/O Port
AD7769JP	ADI	获取价格	LC2MOS Analog I/O Port
AD7769KN	ETC	获取价格	CODEC， Single
AD7769KP	ETC	获取价格	CODEC， Single
AD776AQ	ADI	获取价格	16-Bit 100 kSPS Oversampling ADC
AD776D	ADI	获取价格	IC 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, CDIP20, CERDIP-20, Analog to Digital Converter
AD776N	ADI	获取价格	IC 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDIP20, PLASTIC, DIP-20, Analog to Digital Conve
AD7770	ADI	获取价格	8-Channel, 24-Bit, Simultaneous Sampling ADC

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