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PDF ( 数据手册 , 数据表 ) DAC08HP

零件编号 DAC08HP
描述 8-Bit/ High-Speed/ Multiplying D/A Converter (Universal Digital Logic Interface)
制造商 Analog Devices
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DAC08HP 数据手册, 描述, 功能
a 8-Bit, High-Speed, Multiplying D/A Converter
(Universal Digital Logic Interface)
DAC08
FEATURES
Fast Settling Output Current: 85 ns
Full-Scale Current Prematched to ؎1 LSB
Direct Interface to TTL, CMOS, ECL, HTL, PMOS
Nonlinearity to 0.1% Maximum over
Temperature Range
High Output Impedance and Compliance:
–10 V to +18 V
Complementary Current Outputs
Wide Range Multiplying Capability: 1 MHz Bandwidth
Low FS Current Drift: ؎10 ppm/؇C
Wide Power Supply Range: ؎4.5 V to ؎18 V
Low Power Consumption: 33 mW @ ؎5 V
Low Cost
Available in Die Form
GENERAL DESCRIPTION
The DAC08 series of 8-bit monolithic digital-to-analog convert-
ers provide very high-speed performance coupled with low cost
and outstanding applications flexibility.
Advanced circuit design achieves 85 ns settling times with very
low “glitch” energy and at low power consumption. Monotonic
multiplying performance is attained over a wide 20-to-1 reference
current range. Matching to within 1 LSB between reference and
full-scale currents eliminates the need for full-scale trimming in
most applications. Direct interface to all popular logic families
with full noise immunity is provided by the high swing, adjust-
able threshold logic input.
High voltage compliance complementary current outputs are
provided, increasing versatility and enabling differential opera-
tion to effectively double the peak-to-peak output swing. In
many applications, the outputs can be directly converted to
voltage without the need for an external op amp.
All DAC08 series models guarantee full 8-bit monotonicity,
and nonlinearities as tight as ± 0.1% over the entire operating
temperature range are available. Device performance is essen-
tially unchanged over the ± 4.5 V to ± 18 V power supply range,
with 33 mW power consumption attainable at ± 5 V supplies.
The compact size and low power consumption make the DAC08
attractive for portable and military/aerospace applications;
devices processed to MIL-STD-883, Level B are available.
DAC08 applications include 8-bit, 1 µs A/D converters, servo
motor and pen drivers, waveform generators, audio encoders
and attenuators, analog meter drivers, programmable power
supplies, CRT display drivers, high-speed modems and other
applications where low cost, high speed and complete input/
output versatility are required.
FUNCTIONAL BLOCK DIAGRAM
MSB
V+ VLC B1 B2 B3 B4 B5 B6
13 1 5 6 7 8 9 10
DAC08
14
VREF (+)
BIAS
NETWORK
CURRENT
SWITCHES
15
VREF (–)
REFERENCE
AMPLIFIER
16
COMP
3
V–
B7
11
LSB
B8
12
4 IOUT
2
IOUT
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 that
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: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002







DAC08HP pdf, 数据表
DAC08
10
ALL BITS HIGHOR LOW
9
8
7
I
6
5
4
3
I+
2
1
0
0 2 4 6 8 10 12 14 16 18 20
V+, POSITIVE POWER SUPPLY V dc
TPC 10. Power Supply Current vs. V+
10
BITS MAY BE HIGHOR LOW
9
8
7 IWITH IREF = 2mA
6
5 IWITH IREF = 1mA
4
3 IWITH IREF = 0.2mA
2 I+
1
0
0 2 4 6 8 10 12 14 16 18 20
V, NEGATIVE POWER SUPPLY V dc
TPC 11. Power Supply Current vs. V–
10
ALL BITS HIGHOR LOW
9
8
7 V= 15V
I
6 IREF = 2.0mA
5
4
3
V+ = +15V
I+
2
1
0
50
0 50 100
TEMPERATURE ؇C
150
TPC 12. Power Supply Current vs.
Temperature
BASIC CONNECTIONS
+VREF
RREF
IIN
IREF
VIN 14
RIN
15
RREF
VIN
R15 +VREF
IREF PEAK NEGATIVE SWING OF IIN
RREF
14
R15
(OPTIONAL)
15
HIGH INPUT
IMPEDANCE
+VREF MUST BE ABOVE PEAK POSITIVE SWING OF V IN
Figure 7. Accommodating Bipolar References
+VREF
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
IREF VREF (+) 14 5 6
RREF
(R14)
R15 VREF () 15 3
78
16
9 10 11 12
4
13 1
2
IO
IO
IFR
=
+VREF
RREF
؋ 255
256
0.1F
IO + IO = IFR FOR
ALL LOGIC STATES
VV+
CC
COMP
0.1F
FOR FIXED REFERENCE,
TTL OPERATION,
TYPICAL VALUES ARE:
VREF = 10.000V
RREF = 5.000k
R15 = RREF
CC = 0.01F
VLC = 0V (GROUND)
VV+ VLC
Figure 8. Basic Positive Reference Operation
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
EO
IREF = 2.000mA
14
IO
4
2
IO
5.000k
5.000k
EO
FULL RANGE
B1 B2 B3 B4 B5 B6 B7 B8 IOmA IOmA EO
EO
1 1 1 1 1 1 1 1 1.992 0.000 9.960 0.000
HALF-SCALE +LSB 1 0 0 0 0 0 0 1 1.008 0.984 5.040 4.920
HALF-SCALE
1 0 0 0 0 0 0 0 1.000 0.992 5.000 4.960
HALF-SCALE LSB 0 1 1 1 1 1 1 1 0.992 1.000 4.960 5.000
ZERO-SCALE +LSB 0 0 0 0 0 0 0 1 0.008 1.984 0.040 9.920
ZERO-SCALE
0 0 0 0 0 0 0 0 0.000 1.992 0.000 9.860
Figure 9. Basic Unipolar Negative Operation
–8– REV. B














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