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PDF AD7524 Data sheet ( Hoja de datos )
| Número de pieza | AD7524 | |
| Descripción | CMOS 8-Bit Buffered Multiplying DAC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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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
CMOS
8-Bit Buffered Multiplying DAC
AD7524
FUNCTIONAL BLOCK DIAGRAM
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.
ORDERING GUIDE
Model1
Temperature
Range
AD7524JN
AD7524KN
AD7524LN
AD7524JP
AD7524KP
AD7524LP
AD7524JR
AD7524AQ
AD7524BQ
AD7524CQ
AD7524SQ
AD7524TQ
AD7524UQ
AD7524SE
AD7524TE
AD7524UE
–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
Nonlinearity Package
(VDD = +15 V) Option2
± 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
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
NOTES
1To order MIL-STD-883, Class B processed parts, add/883B to part number.
Contact your local sales office for military data sheet. For U.S. Standard
Military Drawing (SMD) see DESC drawing #5962-87700.
2E = Leadless Ceramic Chip Carrier: N = Plastic DIP; P = Plastic Leaded Chip
Carrier; Q = Cerdip; R = SOIC.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
1 page  
ANALOG CIRCUIT CONNECTIONS
AD7524
AD7524
AD7524
Figure 4. Unipolar Binary Operation
(2-Quadrant Multiplication)
Table I. Unipolar Binary Code Table
Digital Input
MSB LSB
Analog Output
1111 1111
1000 0001
1000 0000
0111 1111
0000 0001
0000 0000
–VREF (255/256)
–VREF (129/256)
–VREF (128/256) = –VREF/2
–VREF (127/256)
–VREF (1/256)
–VREF (0/256) = 0
Note: 1 LSB = (2–8)(VREF) = 1/256 (VREF)
MICROPROCESSOR INTERFACE
Figure 5. Bipolar (4-Quadrant) Operation
Table II. Bipolar (Offset Binary) Code Table
Digital Input
MSB LSB
Analog Output
1111 1111
1000 0001
1000 0000
0111 1111
0000 0001
0000 0000
Note: 1 LSB = (2–7)(VREF) = 1/128 (VREF)
+VREF (127/128)
+VREF (1/128 )
0
–VREF (1/128)
–VREF (127/128)
–VREF (128/128)
Figure 6. AD7524/8085A Interface
Figure 7. AD7524/MC6800 Interface
REV. B
–5–
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AD7524.PDF ] | |
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