AD7484

更新时间： 2024-12-01 12:41:39

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	153K
描述
3MSPS, 14-Bit SAR ADC

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中文翻译

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数据手册

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AD7484 数据手册

PRELIMINARY TECHNICAL DATA

3MSPS,

PreliminaryTechnicalData

14-BitSARADC

AD7484

FEATURES

FUNC TIO NAL BLO C K D IAGRAM

Fast Throughput Rate: 3Msps

Wide Input Bandw idth: 50MHz

AGND

DGND

BIAS DD

VREF1

VREF2

No Pipeline Delays w ith SAR ADC

Excellent DC Accuracy Perform ance

Tw o Parallel Interface Modes

VREF3

BUF

2.5V

REFERENCE

Low Pow er:

90m W (Full-Pow er) and 5m W (NAP Mode)

Standby Mode: 1µA m ax

14-Bit Error

Single +5V Supply Operation

Internal +2.5V Reference

Correcting SAR

VIN

T/H

Full-Scale Overrange Mode (using 15th bit)

System Offset Rem oval via User Access Offset Register

Nom inal 0 to +2.5V Input w ith Shifted Range Capability

Pin Com patible Upgrade of 12-Bit AD7482

AD7484

MODE1

MODE2

CLIP

D14

D13

D12

D11

D10

CONTROL

LOGIC AND I/O

REGISTERS

NAP

STBY

RESET

CONVST

G E NE R AL D E S C R IP T IO N

DRIVE

T he AD7484 is a 14-bit, high speed, low power, succes-

sive-approximation ADC. T he part features a parallel

interface with throughput rates up to 3Msps. T he part

contains a low-noise, wide bandwidth track/hold amplifier

which can handle input frequencies in excess of 50MHz.

T he conversion process is a proprietary algorithmic suc-

cessive-approximation technique which results in no

pipeline delays. T he input signal is sampled and a conver-

sion is initiated on the falling edge of the CONVST

signal. T he conversion process is controlled via an inter-

nally trimmed oscillator. Interfacing is via standard

parallel signal lines making the part directly compatible

with microcontrollers and D SPs.

T he AD7484 features an on-board +2.5V reference but

the part can also accomodate an externally-provided

+2.5V reference source. T he nominal analog input range

is 0 to +2.5V but an offset shift capability allows this

nominal range to be offset by +/-200mV. T his allows the

user considerable flexibility in setting the bottom end

reference point of the signal range, a useful feature when

using single-supply op-amps.

T he AD7484 provides excellent ac and dc performance

specifications. Factory trimming ensures high dc accuracy

resulting in very low INL, offset and gain errors.

T he AD7484 also provides the user with an 8% overrange

capability via a 15th bit. T hus, if the analog input range

strays outside the nominal by up to 8%, the user can still

accurately resolve the signal by using the 15th bit.

T he part uses advanced design techniques to achieve very

low power dissipation at high throughput rates. Power

consumption in normal mode of operation is 90mW.

T here are two power-saving modes: a NAP mode, which

keeps the reference circuitry alive for a quick power up

while consuming 5mW and a ST ANDBY mode which

reduces power consumption to a mere 5µW.

T he AD7484 is powered from a +4.75V to +5.25V sup-

ply. T he part also provides a V_DRIVEpin which allows the

user to set the voltage levels for the digital interface lines.

T he range for this V_DRIVEpin is from +2.7V to +5.25V.

T he part is housed in a 48-pin LQFP package and is

specified over a -40°C to +85°C temperature range.

REV. PrC 7/13/01

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

12 3 4 5 6 7...12

中文翻译

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与AD7484相关器件

型号	品牌	获取价格	描述	数据表
AD7484BST	ADI	获取价格	3MSPS, 14-Bit SAR ADC
AD7484BSTZ	ADI	获取价格	3 MSPS, 14-Bit SAR ADC
AD7485	AMICC	获取价格	1 MSPS, Serial 14-Bit SAR ADC
AD7485	ADI	获取价格	14位1 MSPS SAR ADC
AD7485BST	AMICC	获取价格	1 MSPS, Serial 14-Bit SAR ADC
AD7485BSTZ	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP48, 7 X 7 MM, ROHS COMPLIANT,
AD7490	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490_12	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490BCP	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490BCP-REEL	ADI	获取价格	IC 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC32, MO-220-VHHD-2, LFCSP-3

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