EVAL-AD7656CB AD [Analog Devices], EVAL-AD7656CB Datasheet

EVAL-AD7656CB

Manufacturer Part Number

EVAL-AD7656CB

Description

250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC

Manufacturer

AD [Analog Devices]

Datasheet

1.EVAL-AD7656CB.pdf (25 pages)

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Bonase Electronics (HK) Co., Limited

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EVAL-AD7656CBZ

Manufacturer:

Analog Devices Inc

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Preliminary Technical Data

FEATURES

6 Independent ADCs

Pin/Software Selectable Ranges:- ±10V, ±5V

Fast throughput rate: 250 kSPS

Specified for V

Low power

Wide input bandwidth:

On-chip Reference and Reference Buffers

Parallel and Serial Interface

High speed serial interface

Standby mode: 5 µA max

iCMOS

64 LQFP package

APPLICATIONS

Power Line Monitoring systems

Instrumentation and control systems

Multi-axis positioning systems

GENERAL DESCRIPTION

The AD7658/AD7657/AD7656 contain six 12/14/16-bit, fast, low

power, successive approximation ADCs all in the one package.

The AD7658/AD7657/AD7656 core operates from a single 4.5

V to 5.5 V power supply and features throughput rates up to 250

kSPS. The parts contain low noise, wide bandwidth track-and-

hold amplifiers that can handle input frequencies up to 8 MHz.

The conversion process and data acquisition are controlled

using CONVST signals and an internal oscillator. Three

CONVST pins allow independent simultaneous sampling of the

three ADC pairs. The AD7658/AD7657/AD7656 have both a

high speed parallel and serial interface allowing the devices to

interface with microprocessors or DSPs. When in Serial

interface mode these parts have a Daisy Chain feature allowing

multiple ADCs to connect to a single serial interface. The

AD7658/AD7657/AD7656 can accommodate true bipolar input

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

iCMOS

For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels, iCMOS is a technology platform

that enables the development of analog ICs capable of 30V and operating at +/- 15V supplies while allowing dramatic reductions in power consumption and package size, and

increased AC and DC performance.

Rev. PrI

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.

True Bipolar Analog Inputs

160mW at 250 kSPS with 5 V supplies

85 dB SNR at 50 kHz input frequency

SPI/QSPI/µWire/DSP compatible

Process Technology

of 4.5 V to 5.5 V

Sampling, Bipolar 12/14/16-Bit ADC

250 kSPS, 6-Channel,Simultaneous

signals in the ±10V range and ±5V range . They contain a 2.5V

internal reference and can also accept an external reference. If a

3V external reference is applied to the VREF pin, the ADCs can

accommodate a true bipolar ±12V analog input range. V

PRODUCT HIGHLIGHTS

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

Tel: 781.329.4700

Fax: 781.326.8703

V 3

V 6

V 1

V 2

V 4

V 5

supplies of ±12V are required for this ±12V input range.

T/H

REF

T/H

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

Six true bipolar high impedance analog inputs.

The AD7658/AD7657/AD7656 feature both a parallel and

a high speed serial interface.

V SS

V DD

BUF

AD7658/AD7657/AD7656*

FUNCTIONAL BLOCK DIAGRAM

CLK

OSC

16-BIT SAR

CONVSTA

CONVSTB CONVSTC

CONTROL

Figure 1.

LOGIC

AGND

DGND

DRIVERS

OUTPUT

AV CC

AD7656

www.analog.com

DV CC

SCLK

V DRIVE

D OUT B

DATA/

CONTROL

LINES

SER/PAR

D OUT C

and

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