AD678KD Analog Devices Inc, AD678KD Datasheet

AD678KD

Manufacturer Part Number

AD678KD

Description

A/D Converter (A-D) IC

Manufacturer

Analog Devices Inc

Datasheet

1.AD678JNZ.pdf (14 pages)

Specifications of AD678KD

No. Of Bits

12 Bit

Mounting Type

Through Hole

Features

BiMOS, High-Impedance/-Bandwidth, 10V, AC/DC

No. Of Channels

Interface Type

Parallel

Package / Case

28-CDIP

Rohs Status

RoHS non-compliant

Number Of Bits

Sampling Rate (per Second)

200k

Data Interface

Parallel

Number Of Converters

Power Dissipation (max)

745mw

Voltage Supply Source

Analog and Digital, Dual ±

Operating Temperature

0°C ~ 70°C

Lead Free Status / RoHS Status

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

AD678KD

Manufacturer:

ADI

Quantity:

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Company:

Meier Automation Equipment Co., Limited

Part Number:

AD678KD

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Quantity:

20 000

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PRODUCT DESCRIPTION

The AD678 is a complete, multipurpose 12-bit monolithic

analog-to-digital converter, consisting of a sample-hold ampli-

fier (SHA), a microprocessor compatible bus interface, a voltage

reference and clock generation circuitry.

The AD678 is specified for ac (or “dynamic”) parameters such

as S/N+D ratio, THD and IMD which are important in signal

processing applications. In addition, the AD678K, B and T

grades are fully specified for dc parameters which are important

in measurement applications.

The AD678 offers a choice of digital interface formats; the 12

data bits can be accessed by a 16-bit bus in a single read opera-

tion or by an 8-bit bus in two read operations (8+4), with right

or left justification. Data format is straight binary for unipolar

mode and twos complement binary for bipolar mode. The input

has a full-scale range of 10 V with a full power bandwidth of

1 MHz and a full linear bandwidth of 500 kHz. High input im-

pedance (10 MΩ) allows direct connection to unbuffered

sources without signal degradation.

This product is fabricated on Analog Devices’ BiMOS process,

combining low power CMOS logic with high precision, low

noise bipolar circuits; laser-trimmed thin-film resistors provide

high accuracy. The converter utilizes a recursive subranging

algorithm which includes error correction and flash converter

circuitry to achieve high speed and resolution.

The AD678 operates from +5 V and ±12 V supplies and dissipates

560 mW (typ). The AD678 is available in 28-lead plastic DIP,

ceramic DIP, and 44-lead J-leaded ceramic surface mount packages.

Screening to MIL-STD-883C Class B is also available.

REV. C

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

AC and DC Characterized and Specified

200k Conversions per Second

1 MHz Full Power Bandwidth

500 kHz Full Linear Bandwidth

72 dB S/N+D (K, B, T Grades)

Twos Complement Data Format (Bipolar Mode)

Straight Binary Data Format (Unipolar Mode)

10 M

8-Bit or 16-Bit Bus Interface

On-Board Reference and Clock

10 V Unipolar or Bipolar Input Range

Commercial, Industrial and Military Temperature

MIL-STD-883 Compliant Versions Available

(K, B and T Grades)

Range Grades

Input Impedance

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

Tel: 781/329-4700

Fax: 781/326-8703

PRODUCT HIGHLIGHTS

1. COMPLETE INTEGRATION: The AD678 minimizes ex-

2. SPECIFICATIONS: The AD678K, B and T grades provide

3. EASE OF USE: The pinout is designed for easy board lay-

4. RELIABILITY: The AD678 utilizes Analog Devices’ mono-

5. UPGRADE PATH: The AD678 provides the same pinout as

6. The AD678 is available in versions compliant with MIL-

REF

BIPOFF

AGND

REF

ternal component requirements by combining a high speed

sample-hold amplifier (SHA), ADC, 5 V reference, clock and

digital interface on a single chip. This provides a fully speci-

fied sampling A/D function unattainable with discrete designs.

fully specified and tested ac and dc parameters. The AD678J,

A and S grades are specified and tested for ac parameters; dc

accuracy specifications are shown as typicals. DC specifica-

tions (such as INL, gain and offset) are important in control

and measurement applications. AC specifications (such as

S/N+D ratio, THD and IMD) are of value in signal process-

ing applications.

out, and the choice of single or two read cycle output pro-

vides compatibility with 16- or 8-bit buses. Factory trimming

eliminates the need for calibration modes or external trim-

ming to achieve rated performance.

lithic BiMOS technology. This ensures long-term reliability

compared to multichip and hybrid designs.

the 14-bit, 128 kSPS AD679 ADC.

STD-883. Refer to the Analog Devices Military Products

Databook or current AD678/883B data sheet for detailed

specifications.

AIN

OUT

SAMPLE/

VOLTAGE

HOLD

REF.

FUNCTIONAL BLOCK DIAGRAM

Complete Sampling ADC

CONVERTER

12-BIT D/A

World Wide Web Site: http://www.analog.com

SC OE EOCEN SYNC 12/8 EOC

CONTROL LOGIC

GAIN

STAGE

CONVERSION

12-Bit 200 kSPS

LOGIC

CONVERTER

4-BIT FLASH

A/D

AD678

OUTPUT

AD678

DB11

DB2

DB1

(R/L)

DB0

(HBE)

DGND

Related parts for AD678KD

AD678KD Summary of contents

Page 1

FEATURES AC and DC Characterized and Specified (K, B and T Grades) 200k Conversions per Second 1 MHz Full Power Bandwidth 500 kHz Full Linear Bandwidth 72 dB S/N+D ( Grades) Twos Complement Data Format (Bipolar Mode) ...

Page 2

AD678–SPECIFICATIONS ( MIN MAX AC SPECIFICATIONS f = 10.06 kHz unless otherwise noted) lN Parameter SIGNAL-TO-NOISE AND DISTORTION (S/N+D) RATIO –0.5 dB Input (Referred to –0 dB Input) –20 dB Input (Referred to –20 dB Input) –60 dB ...

Page 3

DC SPECIFICATIONS ( MIN Parameter TEMPERATURE RANGE J, K Grades A, B Grades S, T Grades ACCURACY Resolution Integral Nonlinearity (INL) Differential Nonlinearity (DNL) 1 Unipolar Zero Error (@ +25°C) 1 Bipolar Zero Error (@ +25° ...

Page 4

AD678 (All grades, T TIMING SPECIFICATIONS otherwise noted) Parameter SC Delay Conversion Time l Conversion Rate Convert Pulsewidth Aperture Delay Status Delay 2, 3 Access Time 5 Float Delay Output Delay Format Setup OE Delay Read Pulsewidth Conversion Delay EOCEN ...

Page 5

... ESD precautions, refer to Analog Devices’ ESD Prevention Manual. 1 Model Package AD678JN 28-Lead Plastic DIP AD678KN 28-Lead Plastic DIP AD678JD 28-Lead Ceramic DIP AD678KD 28-Lead Ceramic DIP AD678AD 28-Lead Ceramic DIP AD678BD 28-Lead Ceramic DIP AD678AJ 44-Lead Ceramic JLCC AD678BJ 44-Lead Ceramic JLCC ...

Page 6

AD678 28-Lead DIP 44-Lead Symbol Pin No. JLCC Pin No. Type AGND 7 11 AIN 6 10 BIPOFF DGND 14 23 DB11–DB4 26–19 40, 39, 37, 36, DO 35, 34, 33, 31 DB3, DB2 18, ...

Page 7

NYQUIST FREQUENCY An implication of the Nyquist sampling theorem, the “Nyquist Frequency” converter is that input frequency which is one- half the sampling frequency of the converter. SIGNAL-TO-NOISE AND DISTORTION (S/N+D) RATIO S/N+D is the ratio of the ...

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AD678KD Analog Devices Inc, AD678KD Datasheet

AD678KD

Specifications of AD678KD

Available stocks

Related parts for AD678KD

AD678KD Summary of contents

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