Datasheet > AD9238BSTZ-20EB

AD9238BSTZ-20EB

更新时间： 2024-10-28 04:31:11

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
48页	2155K
描述
12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter

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AD9238BSTZ-20EB 数据手册

12-Bit, 20 MSPS/40 MSPS/65 MSPS

Dual A/D Converter

AD9238

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Integrated dual 12-bit ADC

AVDD AGND

Single 3 V supply operation (2.7 V to 3.6 V)

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

SFDR = 80.5 dBc (to Nyquist, AD9238-65)

Low power: 300 mW/channel at 65 MSPS

Differential input with 500 MHz, 3 dB bandwidth

Exceptional crosstalk immunity > 85 dB

Flexible analog input: 1 V p-p to 2 V p-p range

Offset binary or twos complement data format

Clock duty cycle stabilizer

OTR_A

VIN+_A

VIN–_A

D11_A TO D0_A

OEB_A

SHA

ADC

OUTPUT

MUX/

BUFFERS

REFT_A

REFB_A

VREF

MUX_SELECT

CLK_A

CLOCK

DUTY CYCLE

STABILIZER

CLK_B

DCS

SENSE

AGND

SHARED_REF

PWDN_A

PWDN_B

DFS

0.5V

Output datamux option

MODE

CONTROL

REFT_B

REFB_B

VIN+_B

VIN–_B

APPLICATIONS

Ultrasound equipment

Direct conversion or IF sampling receivers

WB-CDMA, CDMA2000, WiMAX

Battery-powered instruments

Hand-held scopemeters

OTR_B

OUTPUT

MUX/

BUFFERS

SHA

ADC

D11_B TO D0_B

OEB_B

AD9238

DRVDD

DRGND

Low cost, digital oscilloscopes

Figure 1.

GENERAL DESCRIPTION

Fabricated on an advanced CMOS process, the AD9238 is

available in a Pb-free, space saving, 64-lead LQFP or LFCSP and

is specified over the industrial temperature range (−40°C to

+85°C).

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

analog-to-digital converter (ADC). It features dual high

performance sample-and-hold amplifiers (SHAs) and an

integrated voltage reference. The AD9238 uses a multistage

differential pipelined architecture with output error correction

logic to provide 12-bit accuracy and to guarantee no missing

codes over the full operating temperature range at up to

65 MSPS data rates. 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 multiplexed systems that switch full-

scale voltage levels in successive channels and for sampling

inputs at frequencies well beyond the Nyquist rate.

PRODUCT HIGHLIGHTS

1. Pin-compatible with the AD9248, 14-bit 20MSPS/

40 MSPS/65 MSPS ADC.

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

allow flexibility between power, cost, and performance to suit

an application.

3. Low power consumption:

•

AD9238-65: 65 MSPS = 600 mW

AD9238-40: 40 MSPS = 330 mW

AD9238-20: 20 MSPS = 180 mW

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

conversion cycles. A duty cycle stabilizer is available and can

compensate for wide variations in the clock duty cycle, allowing

the converter 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

determine low or high overflow.

4. Typical channel isolation of 85 dB @ f_IN= 10 MHz.

5. The clock duty cycle stabilizer (AD9238-20/AD9238-40/

AD9238-65) maintains performance over a wide range of

clock duty cycles.

6. Multiplexed data output option enables single-port operation

from either Data Port A or Data Port B.

Rev. B

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 that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise 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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与AD9238BSTZ-20EB相关器件

型号	品牌	获取价格	描述	数据表
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
AD9238BSTZRL-20	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZRL-40	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9238BSTZRL-65	ADI	获取价格	12-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter
AD9239	ADI	获取价格	Quad, 12-Bit, 170 MSPS/210 MSPS/250 MSPS Serial Output 1.8 V ADC
AD9239-250KITZ	ADI	获取价格	Quad, 12-Bit, 170 MSPS/210 MSPS/250 MSPS Serial Output 1.8 V ADC
AD9239BCPZ-170	ADI	获取价格	Quad, 12-Bit, 170 MSPS/210 MSPS/250 MSPS Serial Output 1.8 V ADC

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