Datasheet > AD7657-1

AD7657-1

更新时间： 2024-11-24 04:30:47

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	865K
描述
250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC

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AD7657-1 数据手册

250 kSPS, 6-Channel, Simultaneous

Sampling, Bipolar, 16-/14-/12-Bit ADC

AD7656-1/AD7657-1/AD7658-1

FEATURES

FUNCTIONAL BLOCK DIAGRAM

CONVST A CONVST B CONVST C AV

CC CC

Pin and software compatible with AD7656/AD7657/AD7658

featuring reduced decoupling requirements

6 independent ADCs

CLK

OSC

REF

SER/PAR SEL

CONTROL

LOGIC

True bipolar analog inputs

DRIVE

Pin-/software-selectable ranges: 10 V, 5 V

Fast throughput rate: 250 kSPS

iCMOS process technology

STBY

BUF

OUTPUT

DRIVERS

DB8/DOUT A

16-/14-/

T/H

12-BIT SAR

Low power

DB6/SCLK

16-/14-/

12-BIT SAR

140 mW at 250 kSPS with 5 V supplies

High noise performance with wide bandwidth

88 dB SNR at 10 kHz input frequency

On-chip reference and reference buffers

High speed parallel, serial, and daisy-chain interface modes

High speed serial interface

SPI/QSPI™/MICROWIRE™/DSP compatible

Standby mode: 25 μW max

64-lead LQFP

T/H

OUTPUT

DRIVERS

DB9/DOUT B

BUF

16-/14-/

12-BIT SAR

OUTPUT

DRIVERS

DB10/DOUT C

16-/14-/

12-BIT SAR

DATA/

CONTROL

LINES

OUTPUT

DRIVERS

16-/14-/

12-BIT SAR

WR/REF

EN/DIS

16-/14-/

12-BIT SAR

APPLICATIONS

Power line monitoring and measuring systems

Instrumentation and control systems

Multiaxis positioning systems

AD7656-1/AD7657-1/AD7658-1

AGND

DGND

Figure 1.

GENERAL DESCRIPTION

The AD7656-1/AD7657-1/AD7658-1¹are reduced decoupling pin-

and software-compatible versions of AD7656/AD7657/AD7658.

The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/

14-/12-bit, fast, low power successive approximation ADCs in

a package designed on the iCMOS® process (industrial CMOS).

iCMOS is a process combining high voltage silicon with submicron

CMOS and complementary bipolar technologies. It enables the

development of a wide range of high performance analog ICs

capable of 33 V operation in a footprint that no previous generation

of high voltage parts could achieve. Unlike analog ICs using conven-

tional CMOS processes, iCMOS components can accept bipolar

input signals while providing increased performance, which

dramatically reduces power consumption and package size.

The conversion process and data acquisition are controlled

using the CONVST signals and an internal oscillator. Three

CONVST pins (CONVST A, CONVST B, and CONVST C)

allow independent, simultaneous sampling of the three ADC

pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed

parallel and serial interface, allowing the devices to interface with

microprocessors or DSPs. When the serial interface is selected,

each part has a daisy-chain feature that allows multiple ADCs to

connect to a single serial interface. The AD7656-1/AD7657-1/

AD7658-1 can accommodate true bipolar input signals in the

4 ꢀ V_REFand 2 ꢀ V_REFranges. Each AD7656-1/AD7657-1/

AD7658-1 also contains an on-chip 2.5 V reference.

PRODUCT HIGHLIGHTS

The AD7656-1/AD7657-1/AD7658-1 feature throughput rates

of up to 250 kSPS. The parts contain low noise, wide bandwidth

track-and-hold amplifiers that can handle input frequencies

up to 4.5 MHz.

1. Six 16-/14-/12-bit, 250 kSPS ADCs on board.

2. Six true bipolar, high impedance analog inputs.

3. High speed parallel and serial interfaces.

4. Reduced decoupling requirements and reduced bill of

materials cost compared with the AD7656/AD7657/

AD7658 devices.

¹Protected by U.S. Patent No. 6,731,232.

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 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 registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD7657-1相关器件

型号	品牌	获取价格	描述	数据表
AD7657-1_15	ADI	获取价格	250 kSPS, 6-Channel, Simultaneous
AD7657-1BSTZ	ADI	获取价格	6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD, LQF
AD7657-1BSTZ-500RL7	ADI	获取价格	IC 6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD,
AD7657-1BSTZ-REEL	ADI	获取价格	IC 6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD,
AD7657-1YSTZ	ADI	获取价格	IC 6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD,
AD7657-1YSTZ-500RL7	ADI	获取价格	IC 6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD,
AD7657-1YSTZ-REEL	ADI	获取价格	IC 6-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP64, LEAD FREE, MS-026BCD,
AD7657BSTZ	ADI	获取价格	250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC
AD7657BSTZ-1	ADI	获取价格	250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC
AD7657BSTZ-1-RL	ADI	获取价格	250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC

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