Datasheet > AD9245

AD9245

更新时间： 2024-10-27 22:03:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
28页	1338K
描述
14-Bit, 80 MSPS, 3 V A/D Converter

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AD9245 数据手册

14-Bit, 80 MSPS, 3 V A/D Converter

AD9245

FUNCTIONAL BLOCK DIAGRAM

FEATURES

AVDD

DRVDD

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

SNR = 72.7 dBc to Nyquist

AD9245

SFDR = 87.6 dBc to Nyquist

Low power: 366 mW

VIN+

VIN–

8-STAGE

MDAC1

A/D

SHA

1 1/2-BIT PIPELINE

Differential input with 500 MHz bandwidth

On-chip reference and sample-and-hold

DNL = 0.5 LSB

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

Offset binary or twos complement data format

Clock duty cycle stabilizer

A/D

REFT

REFB

CORRECTION LOGIC

OTR

OUTPUT BUFFERS

D13 (MSB)

D0 (LSB)

VREF

APPLICATIONS

SENSE

CLOCK

0.5V

MODE

SELECT

DUTY CYCLE

STABILIZER

High end medical imaging equipment

IF sampling in communications receivers:

WCDMA, CDMA-One, CDMA-2000, TDS-CDMA

Battery-powered instruments

REF

SELECT

AGND

CLK

PDWN MODE DGND

03583-B-001

Hand-held scopemeters

Low cost digital oscilloscopes

Figure 1. Functional Block Diagram

Power sensitive military applications

excellent overall ADC performance. The digital output data is

presented in straight binary or twos complement formats. An

out-of-range (OTR) signal indicates an overflow condition that

can be used with the most significant bit to determine low or

high overflow. Fabricated on an advanced CMOS process, the

AD9245 is available in a 32-lead LFCSP and is specified over

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

GENERAL DESCRIPTION

The AD9245 is a monolithic, single 3 V supply, 14-bit, 80 MSPS

analog-to-digital converter featuring a high performance

sample-and-hold amplifier (SHA) and voltage reference. The

AD9245 uses a multistage differential pipelined architecture

with output error correction logic to provide 14-bit accuracy at

80 MSPS and guarantee no missing codes over the full operat-

ing temperature range.

PRODUCT HIGHLIGHTS

1. The AD9245 operates from a single 3 V power supply and

features a separate digital output driver supply to accommo-

date 2.5 V and 3.3 V logic families.

The wide bandwidth, truly differential SHA allows a variety of

user-selectable input ranges and common modes, including

single-ended applications. It is suitable for multiplexed systems

that switch full-scale voltage levels in successive channels, and

for sampling single-channel inputs at frequencies well beyond

the Nyquist rate. Combined with power and cost savings over

previously available analog-to-digital converters, the AD9245 is

suitable for applications in communications, imaging, and

medical ultrasound.

2. Operating at 80 MSPS, the AD9245 consumes a low 366 mW.

3. The patented SHA input maintains excellent performance for

input frequencies up to 100 MHz, and can be configured for

single-ended or differential operation.

4. The AD9245 is pin compatible with the AD9215, AD9235,

and AD9236. This allows a simplified migration from 10 bits

to 14 bits and 20 MSPS to 80 MSPS.

5. The clock DCS maintains overall ADC performance over a

wide range of clock pulsewidths.

A single-ended clock input is used to control all internal con-

version cycles. A duty cycle stabilizer (DCS) compensates for

wide variations in the clock duty cycle while maintaining

6. The OTR output bit indicates when the signal is beyond the

selected input range.

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AD9245相关器件

型号	品牌	获取价格	描述	数据表
AD9245BCP-20EB	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter
AD9245BCP-40EB	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter
AD9245BCP-65EB	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter
AD9245BCP-80	ADI	获取价格	14-Bit, 80 MSPS, 3 V A/D Converter
AD9245BCP-80EB	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter
AD9245BCPRL7-80	ADI	获取价格	14-Bit, 80 MSPS, 3 V A/D Converter
AD9245BCPZ-20	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS 3 V A/D Converter
AD9245BCPZ-202	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 3 V A/D Converter
AD9245BCPZ-40	ADI	获取价格	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS 3 V A/D Converter
AD9245BCPZ-40	ROCHESTER	获取价格	1-CH 14-BIT FLASH METHOD ADC, PARALLEL ACCESS, QCC32, ROHS COMPLIANT, EXPOSED PAD, MO-220-

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