AD7656BSTZ-1 Analog Devices Inc, AD7656BSTZ-1 Datasheet

AD7656BSTZ-1

Manufacturer Part Number

AD7656BSTZ-1

Description

6-CHANNEL 16-BIT SE BIPOLAR I.C.

Manufacturer

Analog Devices Inc

Datasheets

1.AD7656BSTZ-1.pdf (32 pages)

2.AD7656BSTZ-1.pdf (32 pages)

Specifications of AD7656BSTZ-1

Number Of Bits

Sampling Rate (per Second)

250k

Data Interface

Serial, Parallel

Number Of Converters

Power Dissipation (max)

143mW

Voltage Supply Source

Analog and Digital, Dual ±

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

64-LQFP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD7656-1EDZ - BOARD EVAL CONTROL AD7656-1EVAL-AD7656-1CBZ - BOARD EVAL FOR AD7656-1EVAL-AD7656CBZ - BOARD EVAL FOR AD7656

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

Pin and software compatible with AD7656/AD7657/AD7658

6 independent ADCs

True bipolar analog inputs

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

Fast throughput rate: 250 kSPS

iCMOS process technology

Low power

High noise performance with wide bandwidth

On-chip reference and reference buffers

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

High speed serial interface

Standby mode: 25 μW max

64-lead LQFP

APPLICATIONS

Power line monitoring and measuring systems

Instrumentation and control systems

Multiaxis positioning systems

GENERAL DESCRIPTION

The AD7656-1/AD7657-1/AD7658-1

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 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.

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 registered trademarks are the property of their respective owners.

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

featuring reduced decoupling requirements

88 dB SNR at 10 kHz input frequency

SPI/QSPI™/MICROWIRE™/DSP compatible

140 mW at 250 kSPS with 5 V supplies

are reduced decoupling pin-

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

250 kSPS, 6-Channel, Simultaneous

AD7656-1/AD7657-1/AD7658-1

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

Tel: 781.329.4700

Fax: 781.461.3113

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

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

PRODUCT HIGHLIGHTS

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

Six true bipolar, high impedance analog inputs.

High speed parallel and serial interfaces.

Reduced decoupling requirements and reduced bill of

materials cost compared with the AD7656/AD7657/

AD7658 devices.

T/H

REF

and ±2 × V

FUNCTIONAL BLOCK DIAGRAM

BUF

OSC

CLK

CONVST A CONVST B CONVST C

12-BIT SAR

16-/14-/

REF

AD7656-1/AD7657-1/AD7658-1

ranges. Each AD7656-1/AD7657-1/

CONTROL

LOGIC

Figure 1.

AGND

DGND

DRIVERS

OUTPUT

www.analog.com

SER/PAR SEL

STBY

DB8/DOUT A

DB6/SCLK

DB9/DOUT B

DB10/DOUT C

DATA/

CONTROL

LINES

WR/REF

DRIVE

EN/DIS

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