AD7528LN Analog Devices Inc, AD7528LN Datasheet

AD7528LN
Manufacturer Part Number	AD7528LN
Description	IC DAC 8BIT DUAL MULT 20-DIP
Manufacturer	Analog Devices Inc
AD7528LN datasheets	1. AD7528KNZ.pdf (8 pages)

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Specifications of AD7528LN
Rohs Status	RoHS non-compliant	Settling Time	400ns
Number Of Bits	8	Number Of Converters	2
Voltage Supply Source	Single Supply	Power Dissipation (max)	450mW
Operating Temperature	-40°C ~ 85°C	Mounting Type	Through Hole
Package / Case	20-DIP (0.300", 7.62mm)	Data Interface	-

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FEATURES

On-Chip Latches for Both DACs

+5 V to +15 V Operation

DACs Matched to 1%

Four Quadrant Multiplication

TTL/CMOS Compatible

Latch Free (Protection Schottkys not Required)

APPLICATIONS

Digital Control of:

Gain/Attenuation

Filter Parameters

Stereo Audio Circuits

X-Y Graphics

GENERAL DESCRIPTION

The AD7528 is a monolithic dual 8-bit digital/analog converter

featuring excellent DAC-to-DAC matching. It is available in

skinny 0.3" wide 20-lead DIPs and in 20-lead surface mount

packages.

Separate on-chip latches are provided for each DAC to allow

easy microprocessor interface.

Data is transferred into either of the two DAC data latches via a

common 8-bit TTL/CMOS compatible input port. Control

input DAC A/DAC B determines which DAC is to be loaded.

The AD7528’s load cycle is similar to the write cycle of a ran-

dom access memory and the device is bus compatible with most

8-bit microprocessors, including 6800, 8080, 8085, Z80.

The device operates from a +5 V to +15 V power supply, dis-

sipating only 20 mW of power.

Both DACs offer excellent four quadrant multiplication charac-

teristics with a separate reference input and feedback resistor for

each DAC.

PRODUCT HIGHLIGHTS

1. DAC-to-DAC matching: since both of the AD7528 DACs are

fabricated at the same time on the same chip, precise match-

ing and tracking between DAC A and DAC B is inherent.

The AD7528’s matched CMOS DACs make a whole new

range of applications circuits possible, particularly in the

audio, graphics and process control areas.

2. Small package size: combining the inputs to the on-chip DAC

latches into a common data bus and adding a DAC A/DAC B

select line has allowed the AD7528 to be packaged in either a

small 20-lead DIP, SOIC or PLCC.

REV. B

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.

CMOS Dual 8-Bit

Buffered Multiplying DAC

FUNCTIONAL BLOCK DIAGRAM

DB0

DATA

INPUT

LATCH

INPUTS

BUFFER

DB7

AD7528

DAC A/

DAC B

CONTROL

LOGIC

LATCH

DGND

ORDERING GUIDE

Temperature

Relative

Model

Ranges

Accuracy Error

AD7528JN

–40 C to +85 C

1 LSB

AD7528KN –40 C to +85 C

1/2 LSB

AD7528LN –40 C to +85 C

1/2 LSB

AD7528JP

–40 C to +85 C

1 LSB

AD7528KP

–40 C to +85 C

1/2 LSB

AD7528LP

–40 C to +85 C

1/2 LSB

AD7528JR

–40 C to +85 C

1 LSB

AD7528KR –40 C to +85 C

1/2 LSB

AD7528LR

–40 C to +85 C

1/2 LSB

AD7528AQ –40 C to +85 C

1 LSB

AD7528BQ –40 C to +85 C

1/2 LSB

AD7528CQ –40 C to +85 C

1/2 LSB

AD7528SQ

–55 C to +125 C

1 LSB

AD7528TQ –55 C to +125 C

1/2 LSB

AD7528UQ –55 C to +125 C

1/2 LSB

NOTES

Analog Devices reserves the right to ship side-brazed ceramic in lieu of cerdip. Parts

will be marked with cerdip designator “Q.”

Processing to MIL-STD-883C, Class B is available. To order, add suffix “/883B” to

part number. For further information, see Analog Devices’ 1990 Military Products

Databook.

N = Plastic DIP; P = Plastic Leaded Chip Carrier; Q = Cerdip; R = SOIC.

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

Tel: 781/329-4700

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

Fax: 781/326-8703

AD7528

REF

OUT A

DAC A

AGND

OUT B

DAC B

REF

Gain

Package

Options

4 LSB N-20

2 LSB N-20

1 LSB N-20

4 LSB P-20A

2 LSB P-20A

1 LSB P-20A

4 LSB R-20

2 LSB R-20

1 LSB R-20

4 LSB Q-20

2 LSB Q-20

1 LSB Q-20

4 LSB Q-20

2 LSB Q-20

1 LSB Q-20

Download datasheet (189Kb)

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AD7528LN Summary of contents
Page 1 ... LATCH DGND ORDERING GUIDE Temperature Relative 2 Model Ranges Accuracy Error AD7528JN – + LSB AD7528KN – +85 C 1/2 LSB AD7528LN – +85 C 1/2 LSB AD7528JP – + LSB AD7528KP – +85 C 1/2 LSB AD7528LP – +85 C 1/2 LSB AD7528JR – + LSB AD7528KR – +85 C ... Page 2 AD7528–SPECIFICATIONS Parameter Version 2 STATIC PERFORMANCE Resolution All Relative Accuracy Differential Nonlinearity All Gain Error Gain Temperature Coefficient Gain/ Temperature All ... Page 3 Parameter Version CHANNEL-TO-CHANNEL ISOLATION OUT B All REF OUT A REF DIGITAL CROSSTALK All HARMONIC DISTORTlON All NOTES 1 Temperature Ranges are Versions: – + ... Page 4 AD7528 INTERFACE LOGIC INFORMATION DAC Selection: Both DAC latches share a common 8-bit input port. The con- trol input DAC A/DAC B selects which DAC can accept data from the input port. Mode Selection: Inputs CS and WR control the ... Page 5 V DD DB0 DATA INPUT LATCH INPUTS BUFFER DB7 AD7528 DAC A/ DAC B CONTROL CS LOGIC WR LATCH DGND NOTES: 1 R1, R2 AND R3, R4 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED. SEE TABLE III FOR RECOMMENDED VALUES. ... Page 6 AD7528 APPLICATIONS INFORMATION Application Hints To ensure system performance consistent with AD7528 specifi- cations, careful attention must be given to the following points: 1. GENERAL GROUND MANAGEMENT transient voltages between the AD7528 AGND and DGND can cause noise ... Page 7 MICROPROCESSOR INTERFACE A0–A15 ADDRESS BUS A ADDRESS V DECODE MA LOGIC CPU A + 1 6800 2 D0–D7 DATA BUS ANALOG CIRCUITRY HAS BEEN OMITTED FOR CLARITY *A = DECODED 7528 ADDR DAC DECODED 7528 ... Page 8 AD7528 DIGITALLY CONTROLLED DUAL TELEPHONE ATTENUATOR In this configuration the AD7528 functions as a 2-channel digi- tally controlled attenuator. Ideal for stereo audio and telephone signal level control applications. Table IV gives input codes vs. attenuation for ...

AD7528LN Summary of contents

Page 1
... LATCH DGND ORDERING GUIDE Temperature Relative 2 Model Ranges Accuracy Error AD7528JN – + LSB AD7528KN – +85 C 1/2 LSB AD7528LN – +85 C 1/2 LSB AD7528JP – + LSB AD7528KP – +85 C 1/2 LSB AD7528LP – +85 C 1/2 LSB AD7528JR – + LSB AD7528KR – +85 C ...
Page 2
AD7528–SPECIFICATIONS Parameter Version 2 STATIC PERFORMANCE Resolution All Relative Accuracy Differential Nonlinearity All Gain Error Gain Temperature Coefficient Gain/ Temperature All ...
Page 3
Parameter Version CHANNEL-TO-CHANNEL ISOLATION OUT B All REF OUT A REF DIGITAL CROSSTALK All HARMONIC DISTORTlON All NOTES 1 Temperature Ranges are Versions: – + ...
Page 4
AD7528 INTERFACE LOGIC INFORMATION DAC Selection: Both DAC latches share a common 8-bit input port. The con- trol input DAC A/DAC B selects which DAC can accept data from the input port. Mode Selection: Inputs CS and WR control the ...
Page 5
V DD DB0 DATA INPUT LATCH INPUTS BUFFER DB7 AD7528 DAC A/ DAC B CONTROL CS LOGIC WR LATCH DGND NOTES: 1 R1, R2 AND R3, R4 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED. SEE TABLE III FOR RECOMMENDED VALUES. ...
Page 6
AD7528 APPLICATIONS INFORMATION Application Hints To ensure system performance consistent with AD7528 specifi- cations, careful attention must be given to the following points: 1. GENERAL GROUND MANAGEMENT transient voltages between the AD7528 AGND and DGND can cause noise ...
Page 7
MICROPROCESSOR INTERFACE A0–A15 ADDRESS BUS A** ADDRESS V DECODE MA LOGIC CPU A + 1** 6800 2 D0–D7 DATA BUS *ANALOG CIRCUITRY HAS BEEN OMITTED FOR CLARITY **A = DECODED 7528 ADDR DAC DECODED 7528 ...
Page 8
AD7528 DIGITALLY CONTROLLED DUAL TELEPHONE ATTENUATOR In this configuration the AD7528 functions as a 2-channel digi- tally controlled attenuator. Ideal for stereo audio and telephone signal level control applications. Table IV gives input codes vs. attenuation for ...

AD7528LN

AD7528LN

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AD7528LN Summary of contents

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