DAC08
10
ALL BITS “HIGH” OR “LOW”
POWER SUPPLY CURRENT – mA
POWER SUPPLY CURRENT – mA
10
BITS MAY BE “HIGH” OR “LOW”
8
7
6
5
4
3
2
1
0
2
4
6
8
10 12 14 16 18 20
0
–0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20
V–, NEGATIVE POWER SUPPLY – V dc
I– WITH I
REF
= 0.2mA
I+
I– WITH I
REF
= 1mA
I– WITH I
REF
= 2mA
POWER SUPPLY CURRENT – mA
10
ALL BITS “HIGH” OR “LOW”
9
8
7
6
5
4
3
2
1
0
–50
0
50
100
TEMPERATURE – C
150
V+ = +15V
I+
V– = –15V
I
REF
= 2.0mA
I–
9
8
7
6
5
4
3
I+
2
1
0
I–
9
V+, POSITIVE POWER SUPPLY – V dc
TPC 10. Power Supply Current vs. V+
TPC 11. Power Supply Current vs. V–
TPC 12. Power Supply Current vs.
Temperature
BASIC CONNECTIONS
+V
REF
R
REF
I
IN
V
IN
R
IN
15
I
REF
R
REF
R15 +V
REF
R
REF
14
R15
(OPTIONAL)
15
HIGH INPUT
IMPEDANCE
+V
REF
MUST BE ABOVE PEAK POSITIVE SWING OF V
IN
PEAK NEGATIVE SWING OF I
IN
I
REF
14
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
I
REF
+V
REF
V
REF
(+)
14 5 6 7 8 9 10 11 12
I
O
4
2
3
16
V–
C
C
COMP
I
FR
=
+V
REF
R
REF
255 0.1 F
256
0.1 F
13
V+
1
I
O
FOR FIXED REFERENCE,
TTL OPERATION,
TYPICAL VALUES ARE:
V
REF
= 10.000V
R
REF
= 5.000k
R15 = R
REF
C
C
= 0.01 F
V
LC
= 0V (GROUND)
V
LC
R
REF
(R14)
R15 V
REF
(–)
15
V
IN
I
O
+ I
O
= I
FR
FOR
ALL LOGIC STATES
V–
V+
Figure 7. Accommodating Bipolar References
Figure 8. Basic Positive Reference Operation
LSB
MSB
B1 B2 B3 B4 B5 B6 B7 B8
I
O
I
REF
= 2.000mA
14
I
O
2
E
O
5.000k
FULL RANGE
HALF-SCALE +LSB
HALF-SCALE
HALF-SCALE –LSB
ZERO-SCALE +LSB
ZERO-SCALE
4
5.000k
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
0
0
1
0
0
B6
1
0
0
1
0
0
B7
1
0
0
1
0
0
B8
1
1
0
1
1
0
I
O
mA
1.992
1.008
1.000
0.992
0.008
0.000
I
O
mA
0.000
0.984
0.992
1.000
1.984
1.992
E
O
–9.960
–5.040
–5.000
–4.960
–0.040
0.000
E
O
–0.000
–4.920
–4.960
–5.000
–9.920
–9.860
E
O
Figure 9. Basic Unipolar Negative Operation
–8–
REV. B
AD [ ANALOG DEVICES ]
