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DAC08CSZ Fiches technique(PDF) 11 Page - Analog Devices

No de pièce DAC08CSZ
Description  8-Bit, High Speed, Multiplying D/A Converter
PDF  21 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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DAC08CSZ Fiches technique(HTML) 11 Page - Analog Devices

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Data Sheet
DAC08
Rev. D | Page 11 of 21
BASIC CONNECTIONS
+VREF
RREF
IIN
RIN
VIN
14
15
R15
(OPTIONAL)
HIGH INPUT
IMPEDANCE
+VREF MUST BE ABOVE PEAK POSITIVE SWING OF VIN
RREF ≈ R15
IREF ≥ PEAK NEGATIVE SWING OF IIN
IREF
RREF
VIN
+VREF
14
15
14
15
Figure 23. Accommodating Bipolar References
R15
IREF
FOR FIXED REFERENCE,
TTL OPERATION,
TYPICAL VALUES ARE:
VREF = 10.000V
RREF = 5.000kΩ
R15 = RREF
CC = 0.01µF
VLC = 0V (GROUND)
MSB
B1 B2 B3 B4 B5 B6 B7
LSB
B8
V–
CC
COMP
0.1
µF
V–
V+
VLC
IO
V+
VREF (+)
+VREF
RREF
(R14)
VREF (–)
14
15
4
2
5
6 7
8 9 10 11 12
3
16
13
1
IO
0.1
µF
IFR =
×
IO + IO = IFR FOR
ALL LOGIC STATES
+VREF
RREF
255
256
Figure 24. Basic Positive Reference Operation
IREF = 2.000mA
MSB
B1 B2 B3 B4 B5 B6 B7
LSB
B8
5.000k
Ω
EO
EO
5.000k
Ω
4
2
IO
IO
14
FULL RANGE
HALF SCALE +LSB
HALF SCALE
HALF SCALE –LSB
ZERO SCALE +LSB
ZERO SCALE
B1
1
1
1
0
0
0
B2
1
0
0
1
0
0
B3
1
0
0
1
0
0
B4
1
0
0
1
0
0
B5
1
1
1
0
0
0
B6
1
0
0
1
0
0
B7
1
0
0
1
0
0
B8
1
1
0
1
1
0
IO
1.992
1.008
1.000
0.992
0.008
0.000
IO
0.000
0.984
0.992
1.000
1.984
1.992
EO
–9.960
–5.040
–5.000
–4.960
–0.040
0.000
EO
–0.000
–4.920
–4.960
–5.000
–9.920
–9.960
Figure 25. Basic Unipolar Negative Operation
IREF = 2.000mA
MSB
B1 B2 B3 B4 B5 B6 B7
LSB
B8
10V
10k
Ω
10k
Ω
EO
EO
4
2
IO
IO
14
POS. FULL RANGE
POS. FULL RANGE –LSB
ZERO SCALE +LSB
ZERO SCALE
ZERO SCALE –LSB
NEG. FULL SCALE +LSB
NEG. FULL SCALE
B1
1
1
1
1
0
0
0
B2
1
1
0
0
1
0
0
B3
1
1
0
0
1
0
0
B4
1
1
0
0
1
0
0
B5
1
1
0
0
1
0
0
B6
1
1
0
0
1
0
0
B7
1
1
0
0
1
0
0
B8
1
0
1
0
1
1
0
EO
–9.920
–9.840
–0.080
0.000
+0.080
+9.920
+10.000
EO
+10.000
+9.920
+0.160
+0.080
0.000
–9.840
–9.920
Figure 26. Basic Bipolar Output Operation



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