Datasheet > AD7898

AD7898

更新时间： 2024-11-25 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	183K
描述
5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package

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AD7898 数据手册

5 V, 12-Bit, Serial 220 kSPS

ADC in an 8-Lead Package

AD7898

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast 12-Bit ADC with 220 kSPS Throughput Rate

8-Lead SOIC

REF IN

Single 5 V Supply Operation

High-Speed, Flexible, Serial Interface that Also

Allows Interfacing to 3 V Processors

On-Chip Track/Hold Amplifier

Selection of Input Ranges

؎10 V for AD7898-10

AD7898

TRACK/HOLD

SIGNAL

SCALING*

12-BIT

ADC

؎2.5 V for AD7898-3

High Input Impedance

Low Power: 22.5 mW Max

OUTPUT

CONVST

GND

SDATA

VDRIVE

SCLK

*AD7898-10, AD7898-3

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD7898 is a fast 12-bit ADC that operates from a single

5 V supply and is housed in a small 8-lead SOIC package. The

part contains a successive approximation A/D converter, an on-

chip track/hold amplifier, an on-chip clock, and a high-speed

serial interface.

1. Fast, 12-Bit ADC in 8-Lead Package

The AD7898 contains a 220 kSPS ADC, a track/hold ampli-

fier, control logic, and a high-speed serial interface, all in an

8-lead package. This offers considerable space saving over

alternative solutions.

The AD7898 offers two modes of operation. In Mode 0, con-

version is initiated by the CONVST input and the conversion

process is controlled by an internal clock oscillator. In this mode,

the serial interface consists of three wires and the AD7898 is

capable of throughput rates up to 220 kSPS. In Mode 1, the

conversion process is controlled by an externally-applied SCLK

with data being accessed from the part during conversion. In

this mode, the serial interface consists of three wires and the

AD7898 is capable of throughput rates up to 220 kSPS.

2. Low Power, Single Supply Operation

The AD7898 operates from a single 5 V supply and con-

sumes only 22.5 mW. The V_DRIVEfunction allows the serial

interface to connect directly to either 3 V or 5 V processor

systems independent of V_DD

3. Flexible, High-Speed Serial Interface

The part provides a flexible, high-speed serial interface that

has two distinct modes of operation. Mode 0 provides a three-

wire interface with data being accessed from the AD7898

when conversion is complete. Mode 1 offers a three-wire

interface with data being accessed during conversion.

In addition to the traditional dc accuracy specifications such as

linearity and full-scale and offset errors, the AD7898 is specified

for dynamic performance parameters, including harmonic dis-

tortion and signal-to-noise ratio.

4. Power-Down Mode

The AD7898 offers a proprietary power-down capability

when operated in Mode 1, making the part ideal for portable

or hand-held applications.

The part accepts an analog input range of 10 V (AD7898-10)

and 2.5 V (AD7898-3), and operates from a single 5 V supply,

consuming only 22.5 mW max.

The part is available in an 8-lead small outline IC (SOIC).

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, nor for any infringements of patents or other rights of third parties

which 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

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

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与AD7898相关器件

型号	品牌	获取价格	描述	数据表
AD7898AR10	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-10	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-10	ROCHESTER	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, SOIC-8
AD7898AR-10REEL	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-10REEL	ROCHESTER	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, SOIC-8
AD7898AR-10REEL7	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-3	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-3	ROCHESTER	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, SOIC-8
AD7898AR-3REEL	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package
AD7898AR-3REEL7	ADI	获取价格	5 V, 12-Bit, Serial 220 kSPS ADC in an 8-Lead Package

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