AD7524 Analog Devices, AD7524 Datasheet

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AD7524

Manufacturer Part Number
AD7524
Description
CMOS 8-Bit Buffered Multiplying DAC
Manufacturer
Analog Devices
Datasheet

Specifications of AD7524

Resolution (bits)
8bit
Dac Update Rate
4MSPS
Dac Settling Time
250ns
Max Pos Supply (v)
+15V
Single-supply
Yes
Dac Type
Current Out
Dac Input Format
Par

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a
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.
GENERAL DESCRIPTION
The AD7524 is a low cost, 8-bit monolithic CMOS DAC
designed for direct interface to most microprocessors.
Basically an 8-bit DAC with input latches, the AD7524’s load
cycle is similar to the “write” cycle of a random access
memory. Using an advanced thin-film on CMOS fabrication
process, the AD7524 provides accuracy to 1/8 LSB with a typi-
cal power dissipation of less than 10 milliwatts.
A newly improved design eliminates the protection Schottky
previously required and guarantees TTL compatibility when
using a +5 V supply. Loading speed has been increased for
compatibility with most microprocessors.
Featuring operation from +5 V to +15 V, the AD7524 inter-
faces directly to most microprocessor buses or output ports.
Excellent multiplying characteristics (2- or 4-quadrant) make
the AD7524 an ideal choice for many microprocessor con-
trolled gain setting and signal control applications.
FEATURES
Microprocessor Compatible (6800, 8085, Z80, Etc.)
TTL/CMOS Compatible Inputs
On-Chip Data Latches
Endpoint Linearity
Low Power Consumption
Monotonicity Guaranteed (Full Temperature Range)
Latch Free (No Protection Schottky Required)
APPLICATIONS
Microprocessor Controlled Gain Circuits
Microprocessor Controlled Attenuator Circuits
Microprocessor Controlled Function Generation
Precision AGC Circuits
Bus Structured Instruments
Model
AD7524JN
AD7524KN
AD7524LN
AD7524JP
AD7524KP
AD7524LP
AD7524JR
AD7524AQ
AD7524BQ
AD7524CQ
AD7524SQ
AD7524TQ
AD7524UQ
AD7524SE
AD7524TE
AD7524UE
NOTES
1
2
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
To order MIL-STD-883, Class B processed parts, add/883B to part number.
E = Leadless Ceramic Chip Carrier: N = Plastic DIP; P = Plastic Leaded Chip
Contact your local sales office for military data sheet. For U.S. Standard
Military Drawing (SMD) see DESC drawing #5962-87700.
Carrier; Q = Cerdip; R = SOIC.
8-Bit Buffered Multiplying DAC
1
FUNCTIONAL BLOCK DIAGRAM
Temperature
Range
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
ORDERING GUIDE
Nonlinearity
(V
1/2 LSB
1/4 LSB
1/8 LSB
1/2 LSB
1/4 LSB
1/8 LSB
1/2 LSB
1/2 LSB
1/4 LSB
1/8 LSB
1/2 LSB
1/4 LSB
1/8 LSB
1/2 LSB
1/4 LSB
1/8 LSB
DD
= +15 V) Option
AD7524
Fax: 617/326-8703
CMOS
Package
N-16
N-16
N-16
P-20A
P-20A
P-20A
R-16A
Q-16
Q-16
Q-16
Q-16
Q-16
Q-16
E-20A
E-20A
E-20A
2

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AD7524 Summary of contents

Page 1

... Basically an 8-bit DAC with input latches, the AD7524’s load cycle is similar to the “write” cycle of a random access memory. Using an advanced thin-film on CMOS fabrication process, the AD7524 provides accuracy to 1/8 LSB with a typi- cal power dissipation of less than 10 milliwatts. A newly improved design eliminates the protection Schottky previously required and guarantees TTL compatibility when using supply ...

Page 2

... Chip Select to Write Hold Time t CH All Grades 0 Write Pulse Width t WR AD7524J 170 AD7524S 170 Data Setup Time t DS AD7524J 135 AD7524S 135 Data Hold Time t DH All Grades 10 POWER SUPPLY 100 NOTES 1 Temperature ranges as follows versions: – ...

Page 3

... 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 AD7524 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 ...

Page 4

... DB0–DB7 data bus inputs. In this mode, the AD7524 acts like a nonlatched input D/A converter. HOLD MODE When either HIGH, the AD7524 is in the HOLD mode. The AD7524 analog output holds the value correspond- ing to the last digital input present at DB0–DB7 prior assuming the HIGH state ...

Page 5

... Digital Input MSB LSB 1111 1111 1000 0001 /2 1000 0000 REF 0111 1111 0000 0001 0000 0000 –7 Note: 1 LSB = (2 )( 1/128 (V REF Figure 7. AD7524/MC6800 Interface –5– AD7524 Analog Output +V (127/128) REF +V (1/128 ) REF 0 –V (1/128) REF –V (127/128) REF – ...

Page 6

... AD7524 POWER GENERATION Figure 8. –6– REV. B ...

Page 7

... SQ 0.085 (2.16) 0.385 (9.78) 16-Lead Cerdip (Q-16) 0.005 (0.13) MIN 0.080 (2.03) MAX 16 9 0.310 (7.87) 0.220 (5.59 PIN 1 0.060 (1.52) 0.840 (21.34) MAX 0.015 (0.38) MAX 0.150 (3.81) MIN SEATING 0.023 (0.58) 0.100 0.070 (1.78) 15 PLANE (2.54) 0.014 (0.36) 0.030 (0.76) 0 BSC 0.0196 (0.50 0.0099 (0.25 0.0500 (1.27) 0.0160 (0.41) AD7524 0.290 (7.37) 0.320 (8.13) 0.290 (7.37) 0.015 (0.38) 0.008 (0.20) ...

Page 8

–8– ...

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