AD5668 Analog Devices, AD5668 Datasheet - Page 25
AD5668
Manufacturer Part Number
AD5668
Description
Manufacturer
Analog Devices
Datasheet
1.AD5628.pdf
(32 pages)
Specifications of AD5668
Resolution (bits)
16bit
Dac Update Rate
95kSPS
Dac Settling Time
6µs
Max Pos Supply (v)
+5.5V
Single-supply
Yes
Dac Type
Voltage Out
Dac Input Format
Ser,SPI
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Data Sheet
Table 10. Internal Reference Register
Internal REF Register (DB0)
0
1
Table 11. 32-Bit Input Shift Register Contents for Reference Set-Up Command
MSB
DB31 to DB28
X
Don’t cares
Table 12. Power-Down Modes of Operation
DB9
0
0
1
1
Table 13. 32-Bit Input Shift Register Contents for Power-Down/Power-Up Function
MSB
DB31
to
DB28
X
Don’t
cares
Table 14. Clear Code Register
DB1
CR1
0
0
1
1
Table 15. 32-Bit Input Shift Register Contents for Clear Code Function
MSB
DB31 to DB28
X
Don’t cares
DB27
0
Clear Code Register
Command bits (C3 to C0)
DB26
1
DB8
0
1
0
1
DB0
CR0
0
1
0
1
DB27
0
DB27
1
DB25
0
Command bits (C3 to C0)
Command bits (C3 to C0)
DB26
1
DB24
0
DB26
0
Operating Mode
Normal operation
Power-down modes
1 kΩ to GND
100 kΩ to GND
Three-state
DB23
X
Clears to Code
0x0000
0x8000
0xFFFF
No operation
DB25
0
DB25
0
Address bits (A3 to A0)—
DB22
X
STRING DAC
don’t cares
RESISTOR
DB24
1
DB24
0
Figure 61. Output Stage During Power-Down
DB21
X
DB23
X
DB23
X
DB20
X
Address bits (A3 to A0)—don’t cares
Rev. F | Page 25 of 32
POWER-DOWN
Address bits (A3 to A0)—don’t cares
AMPLIFIER
CIRCUITRY
DB19
to
DB10
X
Don’t
cares
DB22
X
DB22
X
Action
Reference off (default)
Reference on
DB9
PD1
down mode
Power-
DB21
X
DB8
PD0
DB21
X
RESISTOR
NETWORK
DB7
H
DAC
Power-down/power-up channel selection—set bit to 1 to select
DB20
X
V
OUT
DB20
X
DB6
DAC
G
AD5628/AD5648/AD5668
DB5
DAC
F
DB19 to DB2
X
Don’t cares
DB19 to DB1
X
Don’t cares
DB4
DAC
E
DB3
DAC
D
DB1
CR1
Clear code register
DB2
DAC
C
LSB
DB0
1/0
Internal REF
register
DB1
DAC
B
LSB
DB0
CR0
LSB
DB0
DAC
A