AD679TD

AD679TD Datasheet

K, B, T Grades 128k Conversions per Second 1 MHz Full Power Bandwidth 500 kHz Full Linear Bandwidth 78 dB S/N+D K, B, T Grades Twos Complement Data Format Bipolar Mode Straight Binary Data Format Unipolar Mode 10 Input Impedance 8-Bit Bus Interface On-Board Reference and Clock 10 V Unipolar or Bipolar Input Range Pin Compatible with AD678 12-Bit, 200 kSPS ADC MIL-STD-883 Compliant Versions Available

Part	Datasheet
AD679TD	AD679TD (pdf)

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FEATURES AC and DC Characterized and Specified K, B, T Grades 128k Conversions per Second 1 MHz Full Power Bandwidth 500 kHz Full Linear Bandwidth 78 dB S/N+D K, B, T Grades Twos Complement Data Format Bipolar Mode Straight Binary Data Format Unipolar Mode 10 Input Impedance 8-Bit Bus Interface On-Board Reference and Clock 10 V Unipolar or Bipolar Input Range Pin Compatible with AD678 12-Bit, 200 kSPS ADC MIL-STD-883 Compliant Versions Available 14-Bit 128 kSPS Complete Sampling ADC AD679 FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The AD679 is a complete, multipurpose 14-bit monolithic analog-to-digital converter, consisting of a sample-and-hold amplifier SHA , a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry. The AD679 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 AD679K, B, and T grades are fully specified for dc parameters that are important in measurement applications. The 14 data bits are accessed in two read operations 8 + 6 , with 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 impedance 10 allows direct connection to unbuffered sources without signal degradation. Conversions can be initiated either under microprocessor control or by an external clock asynchronous to the system clock. 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 that includes error correction and flash converter circuitry to achieve high speed and resolution. The AD679 operates from +5 V and ±12 V supplies and dissipates 560 mW typ . The part is available in 28-lead plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface-mount packages. PRODUCT HIGHLIGHTS COMPLETE INTEGRATION The AD679 minimizes external component requirements by combining a high speed sample-and-hold amplifier SHA , ADC, 5 V reference, clock, and digital interface on a single chip. This provides a fully specified sampling A/D function unattainable with discrete designs. SPECIFICATIONS The AD679K, B, and T grades provide fully specified and tested ac and dc parameters. The AD679J, A, and S grades are specified and tested for ac parameters dc accuracy specifications are shown as typicals. DC specifications 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 processing applications. EASE OF USE The pinout is designed for easy board layout, and the two-read output provides compatibility with 8-bit buses. Factory trimming eliminates the need for calibration modes or external trimming to achieve rated performance. RELIABILITY The AD679 utilizes Analog Devices’ monolithic BiMOS technology. This ensures long-term reliability compared to multichip and hybrid designs. UPGRADE PATH The AD679 provides the same pinout as the 12-bit, 200 kSPS AD678 ADC. The AD679 is available in versions compliant with MILSTD-883. Refer to the Analog Devices Military Products Databook or current AD679/883B data sheet for detailed specifications. 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. 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 2004 Analog Devices, Inc. All rights reserved. AD679* Product Page Quick Links Last Content Update 08/30/2016 Comparable Parts View a parametric search of comparable parts Documentation Application Notes • AN-214 Ground Rules for High Speed Circuits Data Sheet • AD679 14-Bit 128 kSPS Complete Sampling ADC Data Sheet Reference Materials Technical Articles • MS-2210 Designing Power Supplies for High Speed ADC Design Resources • AD679 Material Declaration • PCN-PDN Information • Quality And Reliability • Symbols and Footprints Discussions View all AD679 EngineerZone Discussions Sample and Buy Visit the product page to see pricing options Technical Support Submit a technical question or find your regional support number AC SPECIFICATIONS TMIN to TMAX, VCC = +12 V 5%, VEE = V 5%, VDD = +5 V 10%, fSAMPLE = 128 kSPS, fIN = kHz, unless otherwise noted 1 Parameter AD679J/A/S ORDERING GUIDE1 Model Package Temperature Range Tested and Package Specified Option2 AD679JN AD679KN AD679JD AD679KD AD679AD AD679BD AD679SD AD679TD AD679AJ AD679BJ AD679SD/883B3 28-Pin Plastic DIP 28-Pin Plastic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 44-Lead Ceramic JLCC 44-Lead Ceramic JLCC 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C to +85°C to +85°C to +125°C to +125°C to +85°C to +85°C AC + DC AC + DC AC + DC AC + DC AC + DC N-28 N-28 D-28 D-28 D-28 D-28 D-28 D-28 J-44 J-44 NOTES 1For parallel read 14-bits interface to 16-bit buses, see AD779. 2N = Plastic DIP D = Ceramic DIP J = J-Leaded Ceramic Chip Carrier. 3For details, grade, and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices Military Products Databook or the current AD679/883B data sheet. CAUTION ESD electrostatic discharge sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD679 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. AD679 DIP Package PIN CONFIGURATIONS JLCC Package CS SC NC OE NC EOCEN NC VDD EOC NC DB7 EOCEN 1 OE 2 SC 3 CS 4 28 VDD 27 EOC 26 DB7 25 DB6 VEE 5 24 DB5 AIN AGND REFOUT 23 DB4 AD679 7 TOP VIEW 22 DB3 8 Not to Scale 21 DB2 REFIN 9 20 DB1 BIPOFF 10 19 DB0 VCC 11 DGND 12 18 DGND 17 DGND SYNC 13 DGND 14 16 DGND 15 HBE 6 5 4 3 2 1 44 43 42 41 40 NC 7 VEE 8 NC 9 AIN 10 AGND 11 REFOUT 12 NC 13 REFIN 14 BIPOFF 15 NC 16 VCC 17 PIN 1 IDENTIFIER Changes to ORDERING GUIDE 5 Updated OUTLINE DIMENSIONS 14

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FEATURES AC and DC Characterized and Specified

K, B, T Grades 128k Conversions per Second 1 MHz Full Power Bandwidth 500 kHz Full Linear Bandwidth 78 dB S/N+D K, B, T Grades Twos Complement Data Format Bipolar Mode Straight Binary Data Format Unipolar Mode 10 Input Impedance 8-Bit Bus Interface On-Board Reference and Clock 10 V Unipolar or Bipolar Input Range Pin Compatible with AD678 12-Bit, 200 kSPS ADC MIL-STD-883 Compliant Versions Available
14-Bit 128 kSPS Complete Sampling ADC

AD679

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION The AD679 is a complete, multipurpose 14-bit monolithic analog-to-digital converter, consisting of a sample-and-hold amplifier SHA , a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry.

The AD679 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 AD679K, B, and T grades are fully specified for dc parameters that are important in measurement applications.

The 14 data bits are accessed in two read operations 8 + 6 , with 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 impedance 10 allows direct connection to unbuffered sources without signal degradation. Conversions can be initiated either under microprocessor control or by an external clock asynchronous to the system clock.

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 that includes error correction and flash converter circuitry to achieve high speed and resolution.

The AD679 operates from +5 V and ±12 V supplies and dissipates 560 mW typ . The part is available in 28-lead plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface-mount packages.

PRODUCT HIGHLIGHTS COMPLETE INTEGRATION The AD679 minimizes
external component requirements by combining a high speed sample-and-hold amplifier SHA , ADC, 5 V reference, clock, and digital interface on a single chip. This provides a fully specified sampling A/D function unattainable with discrete designs.

SPECIFICATIONS The AD679K, B, and T grades provide fully specified and tested ac and dc parameters. The AD679J, A, and S grades are specified and tested for ac parameters dc accuracy specifications are shown as typicals. DC specifications 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 processing applications.

EASE OF USE The pinout is designed for easy board layout, and the two-read output provides compatibility with 8-bit buses. Factory trimming eliminates the need for calibration modes or external trimming to achieve rated performance.

RELIABILITY The AD679 utilizes Analog Devices’ monolithic BiMOS technology. This ensures long-term reliability compared to multichip and hybrid designs.

UPGRADE PATH The AD679 provides the same pinout as the 12-bit, 200 kSPS AD678 ADC.

The AD679 is available in versions compliant with MILSTD-883. Refer to the Analog Devices Military Products Databook or current AD679/883B data sheet for detailed specifications.

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. 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 2004 Analog Devices, Inc. All rights reserved.

AD679* Product Page Quick Links

Last Content Update 08/30/2016

Comparable Parts

View a parametric search of comparable parts

Documentation

Application Notes
• AN-214 Ground Rules for High Speed Circuits Data Sheet
• AD679 14-Bit 128 kSPS Complete Sampling ADC Data

Sheet

Reference Materials

Technical Articles
• MS-2210 Designing Power Supplies for High Speed ADC

Design Resources
• AD679 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints

Discussions

View all AD679 EngineerZone Discussions

Sample and Buy

Visit the product page to see pricing options

Technical Support

Submit a technical question or find your regional support number

AC SPECIFICATIONS TMIN to TMAX, VCC = +12 V 5%, VEE = V 5%, VDD = +5 V 10%, fSAMPLE = 128 kSPS, fIN = kHz, unless otherwise noted 1

Parameter

AD679J/A/S
ORDERING GUIDE1

Model

Package

Temperature Range

Tested and Package Specified Option2

AD679JN AD679KN AD679JD AD679KD AD679AD AD679BD AD679SD AD679TD AD679AJ AD679BJ AD679SD/883B3
28-Pin Plastic DIP 28-Pin Plastic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 28-Pin Ceramic DIP 44-Lead Ceramic JLCC 44-Lead Ceramic JLCC
0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C to +85°C to +85°C to +125°C to +125°C to +85°C to +85°C

AC + DC AC + DC AC + DC AC + DC AC + DC

N-28 N-28 D-28 D-28 D-28 D-28 D-28 D-28 J-44 J-44

NOTES 1For parallel read 14-bits interface to 16-bit buses, see AD779. 2N = Plastic DIP D = Ceramic DIP J = J-Leaded Ceramic Chip Carrier. 3For details, grade, and package offerings screened in accordance with MIL-STD-883, refer to the

Analog Devices Military Products Databook or the current AD679/883B data sheet.

CAUTION ESD electrostatic discharge sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD679 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

AD679

DIP Package

PIN CONFIGURATIONS

JLCC Package

CS SC NC OE NC EOCEN NC VDD EOC NC DB7

EOCEN 1 OE 2 SC 3 CS 4
28 VDD 27 EOC 26 DB7 25 DB6

VEE 5
24 DB5

AIN AGND REFOUT
23 DB4

AD679
7 TOP VIEW 22 DB3
8 Not to Scale 21 DB2

REFIN 9
20 DB1

BIPOFF 10
19 DB0

VCC 11 DGND 12
18 DGND 17 DGND

SYNC 13 DGND 14
16 DGND 15 HBE
6 5 4 3 2 1 44 43 42 41 40

NC 7 VEE 8 NC 9

AIN 10 AGND 11 REFOUT 12

NC 13 REFIN 14 BIPOFF 15

NC 16 VCC 17

PIN 1 IDENTIFIER
Changes to ORDERING GUIDE 5

Updated OUTLINE DIMENSIONS 14

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Datasheet ID: AD679TD 517723