AD660 Analog Devices, AD660 Datasheet - Page 12

• Manufacturer Part Number: AD660
• Description: Monolithic 16-Bit Serial/Byte DACPORT
• Manufacturer: Analog Devices

Specifications of AD660

• Resolution (bits): 16bit
• Dac Update Rate: 167kSPS
• Dac Settling Time: 6µs
• Max Pos Supply (v): +16.5V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Byte,Ser

AD660
It is also possible to use external references other than 10 V with
slightly degraded linearity specifications. The recommended
range of reference voltages is 5 V to 10.24 V, which allows 5 V,
8.192 V, and 10.24 V ranges to be used. For example, by using
the
bipolar can be realized. Using the AD586 voltage reference
makes it possible to operate the AD660 with ±12 V supplies
with 10% tolerances.
Figure 12 shows the AD660 using the AD586 precision 5 V
reference in the bipolar configuration. The highest grade
AD586MN is specified with a drift of 2 ppm/°C, which is a
7.5× improvement over the AD660 internal reference. This
circuit includes two optional potentiometers and one optional
resistor that can be used to adjust the gain, offset, and bipolar
AD586
5 V reference, outputs of 0 V to 5 V unipolar or ±5 V
AD586
GND
V
TRIM
2
4
V
OUT
IN
6
5
R2
10kΩ
Figure 12. Using the AD660 with the AD586 5 V Reference
LDAC
50Ω
HBE
SER
CLR
R1
CLEAR SELECT
16
17
18
19
23
REF IN
LBE/
15
CONTROL
LOGIC
10kΩ
REF OUT
Rev. B | Page 12 of 20
10V REF
50Ω
R2
24
CS
14
DB0/
DB8/
SIN
12
–V
16-BIT LATCH
16-BIT LATCH
1
EE
16-BIT DAC
DB1/DB9/
DATADIR
11
zero errors in a manner similar to that described in the Bipolar
Configuration section. Use −5.000000 V and +4.999847, as the
output values.
The AD660 can also be used with the AD587 10 V reference,
using the same configuration shown in Figure 12 to produce a
±10 V output. The highest grade AD587UQ is specified at
5 ppm/°C, which is a 3× improvement over the AD660 internal
reference.
Figure 13 shows the AD660 using the AD688 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 precise
biasing for the offset trim resistor, R4.
+V
2
DB15
CC
DB7/
5
+V
AD660
10.05kΩ
3
LL
10kΩ
DGND
4
13
22
21
20
V
SPAN/
BIPOLAR
OFFSET
S
AGND
OUT
OUT
OUTPUT