AD9238BST-65

更新时间： 2024-10-27 22:24:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
24页	1704K
描述
12-Bit, 20/40/65 MSPS Dual A/D Converter

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数据手册
替代型号

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AD9238BST-65 数据手册

12-Bit, 20/40/65 MSPS

Dual A/D Converter

AD9238

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Integrated Dual 12-Bit Analog-to-Digital Converters

Single 3V Supply Operation (2.7V to 3.6V)

SNR = 70 dBc (to Nyquist, AD9238-65)

SFDR = 85 dBc (to Nyquist, AD9238-65)

Low Power: 600 mW at 65 MSPS

Differential Input with 500 MHz 3 dB Bandwidth

On-Chip Reference and SHA

Flexible Analog Input: 1V p-p to 2V p-p Range

Offset Binary orTwos Complement Data Format

Clock Duty Cycle Stabilizer

AVDD

DRVDD

OEB_A

OTR_A

VIN+_A

VIN–_A

A/D

SHA

D11_A

D0_A

REFT_A

REFB_A

MUX_SELECT

CLK_A

CLOCK

DUTY CYCLE

STABILIZER

VREF

CLK_B

DCS

SENSE

DFS

0.5V

PDWN_A

PDWN_B

SHARED_REF

MODE

SELECT

APPLICATIONS

Ultrasound Equipment

IF Sampling in Communications Receivers:

IS-95, CDMA One, IMT-2000

Battery-Powered Instruments

Hand-Held Scopemeters

AGND

REFB_B

REFT_B

OEB_B

OTR_B

D11_B

D0_B

VIN–_B

VIN+_B

A/D

SHA

Low Cost Digital Oscilloscopes

AGND

DRGND

PRODUCT HIGHLIGHTS

GENERAL DESCRIPTION

1. Integrated, dual version of the AD9235—a 12-bit,

20 MSPS/40 MSPS/65 MSPS ADC.

The AD9238 is a dual, 3V, 12-bit, 20 MSPS/40 MSPS/65 MSPS

analog-to-digital converter. It features dual high performance

sample-and-hold ampliﬁers and an integrated voltage reference.

The AD9238 uses a multistage differential pipelined architecture

with output error correction logic to provide 12-bit accuracy and

guarantee no missing codes over the full operating temperature

range at data rates up to 65 MSPS.

2. Speed grade options of 20 MSPS, 40 MSPS, and 65 MSPS

allow ﬂexibility between power, cost, and performance to suit

an application.

3. The AD9238 operates from a single 3V power supply and

features a separate digital output driver supply to accommo-

date 2.5V and 3.3V logic families.

The wide bandwidth, differential SHA allows for a variety of

user selectable input ranges and offsets including single-ended

applications. It is suitable for various applications including multi-

plexed systems that switch full-scale voltage levels in successive

channels and for sampling inputs at frequencies well beyond the

Nyquist rate.The AD9238 is suitable for applications in commu-

nications, imaging, and medical ultrasound.

4. Low power consumption:

AD9238-20 operating at 20 MSPS consumes a low 180 mW.

AD9238-40 operating at 40 MSPS consumes a low 330 mW.

AD9238-65 operating at 65 MSPS consumes a low 600 mW.

5. The patented SHA input maintains excellent performance for

input frequencies up to 100 MHz and can be conﬁgured for

single-ended or differential operation.

Dual single-ended clock inputs are used to control all internal con-

version cycles. A duty cycle stabilizer is available on the AD9238-65

and can compensate for wide variations in the clock duty cycle,

allowing the converters to maintain excellent performance.The

digital output data is presented in either straight binary or twos

complement format. Out-of-range signals indicate an overﬂow

condition, which can be used with the most signiﬁcant bit to deter-

mine low or high overﬂow.

6. Typical channel isolation of 80 dB @ f_IN= 10 MHz.

7. The clock duty cycle stabilizer (AD9238-65 only) maintains

performance over a wide range of clock duty cycles.

8. The OTR output bits indicate when either input signal is

beyond the selected input range.

9. Multiplexed data output option enables single-port operation

from either data port A or data port B.

Fabricated on an advanced CMOS process, the AD9238 is avail-

able in a space saving 64-lead LQFP and is speciﬁed over the

industrial temperature range (–40°C to +85°C).

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed byAnalog Devices for its

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

that may result from its use. No license is granted by implication or oth-

erwise under any patent or patent rights of Analog Devices.Trademarks

and registered trademarks are the property of their respective owners.

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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中文翻译

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AD9238BST-65 替代型号

型号	品牌	替代类型	描述	数据表
AD9238BSTZ-65	ADI	完全替代	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-20	ADI	类似代替	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZRL-65	ADI	类似代替	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter

与AD9238BST-65相关器件

型号	品牌	获取价格	描述	数据表
AD9238BST-65PCB	ADI	获取价格	High Speed ADC USB FIFO Evaluation Kit
AD9238BSTRL-20	ADI	获取价格	12-Bit, 20/40/65 MSPS Dual A/D Converter
AD9238BSTRL-40	ADI	获取价格	12-Bit, 20/40/65 MSPS Dual A/D Converter
AD9238BSTRL-65	ADI	获取价格	12-Bit, 20/40/65 MSPS Dual A/D Converter
AD9238BSTZ-20	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-20EB	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-40	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-40EB	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-65	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZ-65EB	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter

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