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Analog Devices Semiconductor Electronic Components Datasheet

AD7524 Datasheet

CMOS 8-Bit Buffered Multiplying DAC

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a
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


Analog Devices Semiconductor Electronic Components Datasheet

AD7524 Datasheet

CMOS 8-Bit Buffered Multiplying DAC

No Preview Available !

AD7524–SPECIFICATIONS (VREF = +10 V, VOUT1 = VOUT2 = 0 V, unless otherwise noted)
Parameter
Limit, TA = +25؇C
Limit, TMIN, TMAX1
VDD = +5 V VDD = +15 V VDD = 5 V VDD = +15 V Units
Test Conditions/Comments
STATIC PERFORMANCE
Resolution
Relative Accuracy
J, A, S Versions
K, B, T Versions
L, C, U Versions
Monotonicity
Gain Error2
Average Gain TC3
DC Supply Rejection,3 Gain/VDD
Output Leakage Current
IOUT1 (Pin 1)
IOUT2 (Pin 2)
DYNAMIC PERFORMANCE
Output Current Settling Time3
(to 1/2 LSB)
AC Feedthrough3
at OUT1
at OUT2
88 8 8
± 1/2 ± 1/2
± 1/2 ± 1/4
± 1/2 ± 1/8
Guaranteed Guaranteed
± 2 1/2
± 1 1/4
± 40 ± 10
± 1/2
± 1/2
± 1/2
Guaranteed
± 3 1/2
± 40
± 1/2
± 1/4
± 1/8
Guaranteed
± 1 1/2
± 10
0.08
0.002
0.02
0.001
0.16
0.01
0.04
0.005
±50 ±50
±50 ±50
± 400
± 400
± 200
± 200
400 250
0.25 0.25
0.25 0.25
500
0.5
0.5
350
0.5
0.5
Bits
LSB max
LSB max
LSB max
LSB max
ppm/°C
% FSR/% max
% FSR/% typ
Gain TC Measured from +25°C to
TMIN or from +25°C to TMAX
VDD = ± 10%
nA max
nA max
DB0–DB7 = 0 V; WR, CS = 0 V; VREF = ± 10 V
DB0–DB7 = VDD; WR, CS = 0 V; VREF = ± 10 V
ns max
% FSR max
% FSR max
OUT1 Load = 100 , CEXT = 13 pF; WR, CS =
0 V; DB0–DB7 = 0 V to VDD to 0 V.
VREF = ± 10 V, 100 kHz Sine Wave; DB0–DB7 =
0 V; WR, CS = 0 V
REFERENCE INPUT
RIN (Pin 15 to GND)4
55 5 5
20 20 20 20
kmin
kmax
ANALOG OUTPUTS
Output Capacitance3
COUT1 (Pin 1)
COUT2 (Pin 2)
COUT1 (Pin 1)
COUT2 (Pin 2)
DIGITAL INPUTS
Input HIGH Voltage Requirement
VIH
Input LOW Voltage Requirement
VIL
Input Current
IIN
Input Capacitance3
DB0–DB7
WR, CS
SWITCHING CHARACTERISTICS
Chip Select to Write Setup Time5
tCS
AD7524J, K, L, A, B, C
AD7524S, T, U
Chip Select to Write Hold Time
tCH
All Grades
Write Pulse Width
tWR
AD7524J, K, L, A, B, C
AD7524S, T, U
Data Setup Time
tDS
AD7524J, K, L, A, B, C
AD7524S, T, U
Data Hold Time
tDH
All Grades
120
30
30
120
+2.4
+0.8
±1
5
20
170
170
0
170
170
135
135
10
120
30
30
120
+13.5
+1.5
±1
5
20
100
100
0
100
100
60
60
10
120
30
30
120
+2.4
+0.5
± 10
5
20
220
240
0
220
240
170
170
10
120
30
30
120
+13.5
+1.5
± 10
5
20
130
150
0
130
150
80
100
10
pF max
pF max
pF max
pF max
V min
V max
µA max
pF max
pF max
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
DB0–DB7 = VDD; WR, CS = 0 V
DB0–DB7 = 0 V; WR, CS = 0 V
VIN = 0 V or VDD
VIN = 0 V
VIN = 0 V
See Timing Diagram
tWR = tCS
tCS tWR, tCH 0
POWER SUPPLY
IDD
12 2 2
100 100 500 500
NOTES
1Temperature ranges as follows: J, K, L versions: –40°C to +85°C
A, B, C versions: –40°C to +85°C
S, T, U versions: –55°C to +125°C
2Gain error is measured using internal feedback resistor. Full-Scale Range (FSR) = VREF.
3Guaranteed not tested.
4DAC thin-film resistor temperature coefficient is approximately –300 ppm/°C.
5AC parameter, sample tested @ +25°C to ensure conformance to specification.
Specifications subject to change without notice.
mA max
µA max
All Digital Inputs VIL or VIH
All Digital Inputs 0 V or VDD
–2– REV. B


Part Number AD7524
Description CMOS 8-Bit Buffered Multiplying DAC
Maker Analog Devices
Total Page 8 Pages
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