Datasheet > AD7485

AD7485

更新时间： 2024-11-30 23:16:19

品牌	Logo	应用领域
联笙电子 - AMICC		/
页数	文件大小	规格书
16页	754K
描述
1 MSPS, Serial 14-Bit SAR ADC

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AD7485 数据手册

1 MSPS, Serial 14-Bit SAR ADC

AD7485

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast Throughput Rate: 1 MSPS

Wide Input Bandwidth: 40 MHz

Excellent DC Accuracy Performance

Flexible Serial Interface

AGND

DGND

BIAS

DRIVE

2.5V

REFERENCE

Low Power:

REFOUT

REFIN

BUF

80 mW (Full Power) and 3 mW (NAP Mode)

STANDBY Mode: 2 ꢀA Max

Single 5 V Supply Operation

Internal 2.5 V Reference

REFSEL

VIN

14-BIT

ALGORITHMIC

SAR

T/H

Full-Scale Overrange Indication

AD7485

GENERAL DESCRIPTION

MCLK

NAP

STBY

The AD7485 is a 14-bit, high speed, low power, successive-

approximation ADC. The part features a serial interface with

throughput rates up to 1 MSPS. The part contains a low noise,

wide bandwidth track-and-hold that can handle input frequencies

in excess of 40 MHz.

TFS

CONTROL

LOGIC AND I/O

REGISTERS

SCO

RESET

CONVST

SDO

SMODE

The conversion process is a proprietary algorithmic successive-

approximation technique. The input signal is sampled and a

conversion is initiated on the falling edge of the CONVST signal.

The conversion process is controlled by an external master

clock. Interfacing is via standard serial signal lines, making the

part directly compatible with microcontrollers and DSPs.

The AD7485 features an on-board 2.5 V reference, but the part can

also accommodate an externally provided 2.5 V reference source.

The nominal analog input range is 0 V to 2.5 V.

The AD7485 also provides the user with overrange indication via a

fifteenth bit. If the analog input range strays outside the 0 V to

2.5 V input range, the fifteenth data bit is set to a logic high.

The AD7485 provides excellent ac and dc performance specifi-

cations. Factory trimming ensures high dc accuracy resulting in

very low INL, DNL, offset, and gain errors.

The AD7485 is powered from a 4.75 V to 5.25 V supply. The

part also provides a V_DRIVEpin that allows the user to set the

voltage levels for the digital interface lines. The range for this

V_DRIVEpin is from 2.7 V to 5.25 V. The part is housed in a

48-lead LQFP package and is specified over a –40°C to +85°C

temperature range.

The part uses advanced design techniques to achieve very low

power dissipation at high throughput rates. Power consumption

in the normal mode of operation is 80 mW. There are two power-

saving modes: a NAP mode keeps reference circuitry alive for

quick power-up and consumes 3 mW, while a STANDBY mode

reduces power consumption to a mere 10 µW.

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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

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

www.analog.com

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与AD7485相关器件

型号	品牌	获取价格	描述	数据表
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
AD7490BCPZ	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490BCPZ-REEL7	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490BRU	ADI	获取价格	16-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP
AD7490BRU-EP-RL7	ADI	获取价格	IC 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO28, PLASTIC, MO-153AE, TS

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