DatasheetQ Logo
Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

DAC08EQ View Datasheet(PDF) - Analog Devices

Part Name
Description
Manufacturer
DAC08EQ Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
BASIC CONNECTIONS
+VREF
RREF
IIN
IREF
VIN
14
RIN
15
RREF R15 +VREF
IREF PEAK NEGATIVE SWING OF IIN
RREF
14
R15
(OPTIONAL)
VIN
15
HIGH INPUT
IMPEDANCE
+VREF MUST BE ABOVE PEAK POSITIVE SWING OF VIN
Figure 23. Accommodating Bipolar References
DAC08
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
IREF
+VREF
RREF
VREF (+) 14 5
6
7
8
9 10 11 12
4
IO
(R14)
VREF (–) 15 3
16 13
1
2
R15
IO
V–
V+
CC
FOR FIXED REFERENCE,
TTL OPERATION,
IFR
=
+VREF
RREF
×
255
256
0.1µF
IO + IO = IFR FOR
ALL LOGIC STATES
COMP
0.1µF
V–
V+
TYPICAL VALUES ARE:
VREF = 10.000V
RREF = 5.000k
R15 = RREF
CC = 0.01µF
VLC VLC = 0V (GROUND)
Figure 24. Basic Positive Reference Operation
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
EO
IREF = 2.000mA
14
IO 4
5.000k
5.000k
2
IO
EO
FULL RANGE
HALF SCALE +LSB
HALF SCALE
HALF SCALE –LSB
ZERO SCALE +LSB
ZERO SCALE
B1 B2 B3 B4 B5 B6 B7 B8 IO
1 1 1 1 1 1 1 1 1.992
1 0 0 0 1 0 0 1 1.008
1 0 0 0 1 0 0 0 1.000
0 1 1 1 0 1 1 1 0.992
0 0 0 0 0 0 0 1 0.008
0 0 0 0 0 0 0 0 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
10V
MSB
LSB
B1 B2 B3 B4 B5 B6 B7 B8
IREF = 2.000mA
14
10k
IO
4
EO
2
IO
EO
10k
B1 B2 B3 B4 B5 B6 B7 B8 EO
EO
POS. FULL RANGE
1 1 1 1 1 1 1 1 –9.920 +10.000
POS. FULL RANGE –LSB 1 1 1 1 1 1 1 0 –9.840 +9.920
ZERO SCALE +LSB
1 0 0 0 0 0 0 1 –0.080 +0.160
ZERO SCALE
1 0 0 0 0 0 0 0 0.000 +0.080
ZERO SCALE –LSB
0 1 1 1 1 1 1 1 +0.080 0.000
NEG. FULL SCALE +LSB 0 0 0 0 0 0 0 1 +9.920 –9.840
NEG. FULL SCALE
0 0 0 0 0 0 0 0 +10.000 –9.920
Figure 26. Basic Bipolar Output Operation
VREF
10V
39k
10k
POT
LOW T.C.
4.5k
14
IREF (+) 2mA
1V
15
APPROX
5k
Figure 27. Recommended Full-Scale Adjustment Circuit
RREF
–VREF
R15
IFS
–VREF
RREF
14
IO
4
IO
15
2
NOTE
RREF SETS IFS; R15 IS FOR
BIAS CURRENT CANCELLATION.
Figure 28. Basic Negative Reference Operation
Rev. C | Page 11 of 20
 

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]