AD7827BR

更新时间： 2024-09-15 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	188K
描述
3 V/5 V, 1 MSPS, 8-Bit, Serial Interface Sampling ADC

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AD7827BR 数据手册

3 V/5 V, 1 MSPS, 8-Bit, Serial Interface

Sampling ADC

AD7827

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

8-Bit Half-Flash ADC w ith 420 ns Conversion Tim e

200 ns Acquisition Tim e

REFIN REFOUT

GND

8-Lead Package

On-Chip Track-and-Hold

2.5V

REF

AD7827

DETECT

On-Chip 2.5 V Reference w ith 2% Tolerance

Operating Supply Range: 3 V ؎ 10% and 5 V ؎ 10%

Specifications @ 3 V and 5 V

DSP/ Microcontroller Com patible Serial Interface

Autom atic Pow er-Dow n at End of Conversion

Input Ranges

CONTROL

LOGIC

CONVST

COMP

BUF

SCLK

8-BIT

SERIAL

PORT

T/H

HALF-FLASH

ADC

OUT

0 V to 2 V, V_DD= 3 V

RFS

0 V to 2.5 V, V_DD= 5 V

GENERAL D ESCRIP TIO N

P RO D UCT H IGH LIGH TS

T he AD7827 is a high speed, single channel, low power, analog-

to-digital converter with a maximum throughput of 1 MSPS that

operates from a single 3 V or 5 V supply. T he AD7827 contains

a track/hold amplifier, an on-chip 2.5 V reference (2% toler-

ance), a 420 ns 8-bit half-flash ADC and a serial interface. T he

serial interface is compatible with the serial interfaces of most

DSPs (Digital Signal Processors). T he throughput rate of the

AD7827 is dependent on the clock speed of the DSP serial

interface.

1. Fast Conversion T ime

T he AD7827 has a conversion time of 420 ns. Faster conver-

sion times maximize the DSP processing time in a real time

system.

2. Built-In T rack-and-Hold

T he analog input signal is held and a new conversion is initi-

ated on the falling edge of the CONVST signal. The CONVST

signal allows the sampling instant to be exactly controlled.

T his feature is a requirement in many DSP applications.

T he AD7827 combines the Convert Start and Power Down

signals at one pin, i.e., the CONVST pin. T his allows a unique

automatic power-down at the end of a conversion to be imple-

mented. T he logic level on the CONVST pin is sampled at the

end of a conversion and, depending on its state, the AD7827

powers down.

3. Automatic Power-Down

T he CONVST signal is sampled approximately 100 ns after

the end of conversion and depending on its state the AD7827

is powered down.

4. An easy to use, fast serial interface allows direct interfacing to

most popular DSPs with no external circuitry.

T he AD7827 has one single-ended analog input with an input

span determined by the supply voltage. With a V_DDof 3 V, the

input range of the AD7827 is 0 V to 2 V and with V_DDequal to

5 V, the input range is 0 V to 2.5 V.

T he parts are available in a small, 8-lead, 0.3" wide, plastic

dual-in-line package (DIP) and an 8-lead, small outline IC

(SOIC).

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: 781/ 329-4700

Fax: 781/ 326-8703

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

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AD7827BR 替代型号

型号	品牌	替代类型	描述	数据表
AD7827BR-REEL	ADI	完全替代	IC 1-CH 8-BIT FLASH METHOD ADC, SERIAL ACCESS, PDSO8, SO-8, Analog to Digital Converter
AD7827BRZ	ADI	完全替代	3 V/5 V, 1 MSPS, 8-Bit, Serial InterfaceSampling ADC

与AD7827BR相关器件

型号	品牌	获取价格	描述	数据表
AD7827BR-REEL	ADI	获取价格	IC 1-CH 8-BIT FLASH METHOD ADC, SERIAL ACCESS, PDSO8, SO-8, Analog to Digital Converter
AD7827BR-REEL7	ADI	获取价格	IC 1-CH 8-BIT FLASH METHOD ADC, SERIAL ACCESS, PDSO8, SO-8, Analog to Digital Converter
AD7827BR-REEL7	ROCHESTER	获取价格	1-CH 8-BIT FLASH METHOD ADC, SERIAL ACCESS, PDSO8, SO-8
AD7827BRZ	ADI	获取价格	3 V/5 V, 1 MSPS, 8-Bit, Serial InterfaceSampling ADC
AD7827BRZ-REEL7	ADI	获取价格	IC 1-CH 8-BIT FLASH METHOD ADC, SERIAL ACCESS, PDSO8, SO-8, Analog to Digital Converter
AD7828	ADI	获取价格	LC2MOS High Speed 4- & 8-Channel 8-Bit ADCs
AD7828_15	ADI	获取价格	LC MOS High Speed 4- and 8-Channel 8-Bit ADCs
AD7828BCHIPS	ADI	获取价格	IC 8-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, UUC, Analog to Digital Converter
AD7828BQ	ADI	获取价格	LC2MOS High Speed 4- & 8-Channel 8-Bit ADCs
AD7828BR	ADI	获取价格	LC2MOS High Speed 4- & 8-Channel 8-Bit ADCs

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