AD660SQ/883B AD [Analog Devices], AD660SQ/883B Datasheet - Page 8

• Manufacturer Part Number: AD660SQ/883B
• Description: Monolithic 16-Bit Serial/Byte DACPORT
• Manufacturer: AD [Analog Devices]

AD660
Figure 5 shows the AD660 using the AD586 precision 5 V refer-
ence in the bipolar configuration. The highest grade AD586MN
is specified with a drift of 2 ppm/ C which is a 7.5 improve-
ment over the AD660’s internal reference. This circuit includes
two optional potentiometers and one optional resistor that can
be used to adjust the gain, offset and bipolar zero errors in a
manner similar to that described in the BIPOLAR CONFIGU-
RATION section. Use –5.000000 V and +4.999847 as the out-
put values.
R3
5
R
R2
S
9
A2
7
A1
R1
10
R5
6
8
Figure 6. Using the AD660 with the AD688 High Precision 10 V Reference
R4
12
AD586
GND
R6
4
+V
4
11 13
TRIM
V
2
CC
AD688
OUT
3
Figure 5. Using the AD660 with the AD586 5 V Reference
6
5
A3
A4
14
15
16
1
2
+V
–V
CC
EE
R2
10k
LDAC
100
HBE
R1
SER
CLR
100
LDAC
R1
HBE
SER
CLR
16
17
18
19
23
UNI/BIP CLR/
REF IN
16
17
18
19
23
UNI/BIP CLR/
LBE
CONTROL
15
LOGIC
REF IN
LBE
CONTROL
15
LOGIC
CS
14
10k
–8–
REF OUT
+10V REF
CS
14
10k
DB0
SIN/
50
24
The AD660 can also be used with the AD587 10 V reference,
using the same configuration shown in Figure 5 to produce a
5 ppm/ C, which is a 3 improvement over the AD660’s inter-
nal reference.
Figure 6 shows the AD660 using the AD680 precision 10 V
reference, in the unipolar configuration. The highest grade
AD688BQ is specified with a temperature coefficient of
1.5 ppm/ C. The 10 V output is also ideal for providing pre-
cise biasing for the offset trim resistor R4.
12
R2
REF OUT
16-BIT LATCH
16-BIT LATCH
+10V REF
10 V output. The highest grade AD587LR, N is specified at
16-BIT DAC
SIN/
DB0
MSB/LSB/
DB1
11
24
12
16-BIT LATCH
16-BIT LATCH
16-BIT DAC
–V
MSB/LSB/
DB1
1
11
EE
DB7
–V
5
+V
1
EE
2
CC
DB7
5
+V
2
+V
CC
AD660
3
10.05k
LL
10k
+V
AD660
DGND
3
10.05k
LL
10k
4
DGND
SPAN/
BIP OFF
4
13
22
21
20
SPAN/
BIP OFF
V
S
AGND
OUT
OUT
13
22
20
OUTPUT
21
V
S
AGND
OUT
OUT
R2
100
10k
R3
R4
10k
OUTPUT
0 TO +10V
REV. A