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Teilenummer | DAC-08CN |
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Beschreibung | 8-bit high-speed multiplying D/A converter | |
Hersteller | NXP Semiconductors | |
Logo | ||
Gesamt 12 Seiten Philips Semiconductors Linear Products
8-Bit high-speed multiplying D/A converter
Product specification
DAC08 Series
DESCRIPTION
The DAC08 series of 8-bit monolithic multiplying Digital-to-Analog
Converters provide very high-speed performance coupled with low
cost and outstanding applications flexibility.
Advanced circuit design achieves 70ns settling times with very low
glitch 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, adjustable threshold logic inputs.
Dual complementary outputs are provided, increasing versatility and
enabling differential operation to effectively double the peak-to-peak
output swing. True high voltage compliance outputs allow direct
output voltage conversion and eliminate output op amps in many
applications.
All DAC08 series models guarantee full 8-bit monotonicity and
linearities as tight as 0.1% over the entire operating temperature
range. Device performance is essentially unchanged over the ±4.5V
to ±18V power supply range, with 37mW power consumption
attainable at ±5V supplies.
The compact size and low power consumption make the DAC08
attractive for portable and military aerospace applications.
FEATURES
• Fast settling output current—70ns
• Full-scale current prematched to ±1 LSB
• Direct interface to TTL, CMOS, ECL, HTL, PMOS
• Relative accuracy to 0.1% maximum over temperature range
• High output compliance -10V to +18V
• True and complemented outputs
• Wide range multiplying capability
• Low FS current drift — ±10ppm/°C
• Wide power supply range—±4.5V to ±18V
• Low power consumption—37mW at ±5V
APPLICATIONS
• 8-bit, 1µs A-to-D converters
• Servo-motor and pen drivers
PIN CONFIGURATIONS
F, N Packages
VLC 1
IO 2
V– 3
IO 4
B1 (MSB) 5
B2 6
B3 7
B4 8
16 COMP
15 VREF–
14 VREF+
13 V+
12 B8 (LSB)
11 B7
10 B6
9 B5
TOP VIEW
D1 Package
V+ 1
VREF+ 2
VREF– 3
COMPEN 4
VLC 5
IO 6
V– 7
IO 8
16 B8 (LSB)
15 B7
14 B6
13 B5
12 B4
11 B3
10 B2
9 B1 (MSB)
TOP VIEW
NOTE:
1. SO and non-standard pinouts.
• Waveform generators
• Audio encoders and attenuators
• Analog meter drivers
• Programmable power supplies
• CRT display drivers
• High-speed modems
• Other applications where low cost, high speed and complete in-
put/output versatility are required
• Programmable gain and attenuation
• Analog-Digital multiplication
August 31, 1994
716 853-0045 13721
Philips Semiconductors Linear Products
8-Bit high-speed multiplying D/A converter
Product specification
DAC08 Series
TEST CIRCUITS (Continued)
VCC
13
5 REQ = 200Ω
6 14
7 15
81
9 DAC-08 2
10 4
11 16 OPEN
12
0.1µF
3
VEE
RIN
1k
RP
VIN
2V
0
10%
RL
SCOPE
dI I dV
dt + RL dt
90%
SLEWING TIME
Figure 3. Reference Current Slew Rate Measurement
VCC
ICC
DIGITAL
INPUTS
A1
A2
A3
A4
A5
A6
A7
A8
(+)
VI
5
6
7
8
9
10
11
12
II
13
DAC-08
3
I14
14
R14
15 I15
1 R15
2
4
16 IO
C
VREF (+)
VO
OUTPUT
RL
NOTES:
(See text for values of C.)
Typical values of R14 = R15 = 1k
VREF = +2.0V
C = 15pF
IEE
VEE
VI and II apply to inputs A1 through A8
The resistor tied to Pin 15 is to temperature compensate the bias current and may not be necessary for all applications.
A1 A2 A3 A4 A5 A6 A7 A8
Ť ŤIO + K 2 ) 4 ) 8 ) 16 ) 32 ) 64 ) 128 ) 256
VREF
where K [ R14
and AN = ‘1’ if AN is at High Level
AN = ‘0’ if AN is at Low Level
Figure 4. Notation Definitions
0
2.0mA
August 31, 1994
721
6 Page Philips Semiconductors Linear Products
8-Bit high-speed multiplying D/A converter
Product specification
DAC08 Series
UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT
V = 10V
IR = 2mA
DAC-08
14
4
2
a. Positive Output
5kΩ 5kΩ
VOUT
VOUT
IR = 2mA
DAC-08
14
4
2
a. Negative Output
VOUT
VOUT
BASIC BIPOLAR OUTPUT OPERATION (OFFSET BINARY)
V = 10V
IR = 2mA
DAC-08
14
4
2
10kΩ
VOUT
10kΩ
VOUT
B1 B2 B3 B4 B5 B6 B7 B8
VOUT
Positive full-scale
1 1 1 1 1 1 1 1 –9.920V
Positive FS – 1LSB
1 1 1 1 1 1 1 0 –9.840V
+ Zero-scale + 1LSB
Zero-scale
1 0 0 0 0 0 0 1 –0.080V
10000000
0.000
Zero-scale – 1LSB
01111111
0.080
Negative full scale – 1LSB 0 0 0 0 0 0 0 1 +9.920
Negative full scale
0 0 0 0 0 0 0 0 +10.000
VOUT
+10.000
+9.920
+0.160
+0.080
0.000
–9.840
–9.920
August 31, 1994
727
12 Page | ||
Seiten | Gesamt 12 Seiten | |
PDF Download | [ DAC-08CN Schematic.PDF ] |
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