DAC08 Analog Devices, DAC08 Datasheet - Page 11

• Manufacturer Part Number: DAC08
• Description: 8-Bit, High Speed, Multiplying D/A Converter (Universal Digital Logic Interface)
• Manufacturer: Analog Devices

Specifications of DAC08

• Resolution (bits): 8bit
• Dac Update Rate: 11.8MSPS
• Dac Settling Time: 85ns
• Max Pos Supply (v): +18V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

BASIC CONNECTIONS
V
V
R
IN
IN
REF
≈ R15
V
Figure 27. Recommended Full-Scale Adjustment Circuit
10V
REF
I
REF
39kΩ
10kΩ
POT
+V
I
Figure 23. Accommodating Bipolar References
REF
= 2.000mA
IMPEDANCE
REF
HIGH INPUT
+V
= 2.000mA
I
REF
REF
LOW T.C.
APPROX
4.5kΩ
(OPTIONAL)
MUST BE ABOVE PEAK POSITIVE SWING OF V
(+) ≈ 2mA
≈1V
5kΩ
I
R
IN
MSB
14
I
R
B1 B2 B3 B4 B5 B6 B7
IN
R
REF
R15
REF
REF
+V
MSB
14
B1 B2 B3 B4 B5 B6 B7
≥ PEAK NEGATIVE SWING OF I
REF
I
14
15
REF
14
14
15
15
14
15
LSB
B8
I
I
O
O
LSB
4
2
B8
I
I
O
O
4
2
E
E
O
O
10kΩ
5.000kΩ
5.000kΩ
Figure 25. Basic Unipolar Negative Operation
E
E
O
O
IN
Figure 26. Basic Bipolar Output Operation
10V
10kΩ
IN
Rev. C | Page 11 of 20
FULL RANGE
HALF SCALE +LSB
HALF SCALE
HALF SCALE –LSB
ZERO SCALE +LSB
ZERO SCALE
POS. FULL RANGE
POS. FULL RANGE –LSB
ZERO SCALE +LSB
ZERO SCALE
ZERO SCALE –LSB
NEG. FULL SCALE +LSB
NEG. FULL SCALE
I
ALL LOGIC STATES
I
O
FR
+V
+ I
=
REF
B1
O
1
1
1
0
0
0
+V
R
= I
REF
REF
B2
FR
1
0
0
1
0
0
(R14)
R
R15
I
REF
FOR
REF
×
B1
B3
–V
1
0
0
1
0
0
1
1
1
1
0
0
0
255
256
I
Figure 24. Basic Positive Reference Operation
REF
FS
B4
B2
Figure 28. Basic Negative Reference Operation
1
0
0
1
0
0
1
1
0
0
1
0
0
V
V
≈
REF
REF
0.1µF
B5
B3
–V
1
1
1
0
0
0
1
1
0
0
1
0
0
R
REF
(+)
R
(–)
REF
R15
B6
B4
REF
1
0
0
1
0
0
1
1
0
0
1
0
0
14
15
MSB
B5
B7
B1 B2 B3 B4 B5 B6 B7
1
0
0
1
0
0
1
1
0
0
1
0
0
5 6 7 8 9 10 11 12
3
V–
NOTE
R
BIAS CURRENT CANCELLATION.
14
15
B8
B6
V–
0.1µF
REF
1
1
0
1
1
0
1
1
0
0
1
0
0
C
C
16
COMP
B7
1.992
1.008
1.000
0.992
0.008
0.000
SETS I
1
1
0
0
1
0
0
I
O
B8
1
0
1
0
1
1
0
13
V+
0.000
0.984
0.992
1.000
1.984
1.992
FS
V+
+10.000
–9.920
–9.840
–0.080
+0.080
+9.920
I
0.000
O
; R15 IS FOR
V
E
1
LC
O
LSB
B8
FOR FIXED REFERENCE,
TTL OPERATION,
TYPICAL VALUES ARE:
–9.960
–5.040
–5.000
–4.960
–0.040
0.000
E
+10.000
4
2
O
+9.920
+0.160
+0.080
–9.840
–9.920
V
R
R15 = R
C
V
0.000
REF
LC
E
REF
C
O
4
2
= 0.01µF
= 0V (GROUND)
–0.000
–4.920
–4.960
–5.000
–9.920
–9.960
= 10.000V
= 5.000kΩ
E
I
I
O
REF
O
O
I
I
O
O
DAC08