參數(shù)資料
型號: AD5392
廠商: Analog Devices, Inc.
英文描述: 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs
中文描述: 8-/16-Channel,3伏/ 5伏,串行輸入,單電源,12-/14-Bit電壓輸出DAC
文件頁數(shù): 25/44頁
文件大?。?/td> 1319K
代理商: AD5392
AD5390/AD5391/AD5392
INTERFACES
The AD5390/AD5391/AD5392 contain a serial interface that
can be programmed to be either DSP-, SPI-, and MICROWIRE-
compatible, or I
2
C-compatible. The SPI/I
2
C pin is used to select
the interface mode.
Rev. A | Page 25 of 44
To minimize both the power consumption of the device and
the on-chip digital noise, the interface powers up fully only
when the device is being written to—that is, on the falling
edge of SYNC.
DSP-, SPI-, AND MICROWIRE-COMPATIBLE SERIAL
INTERFACE
The serial interface can be operated with a minimum of three
wires in standalone mode or four wires in daisy-chain mode.
Daisy-chaining allows many devices to be cascaded together to
increase system channel count. The SPI/I
2
C pin is tied to a
Logic 1 pin to configure this mode of operation. The serial
interface control pins are described in Table 17.
Table 17. Serial Interface Control Pins
Pin
Description
SYNC, DIN, SCLK
Standard 3-wire interface pins.
DCEN
Selects standalone mode or daisy-chain
mode.
SDO
Data out pin for daisy-chain mode.
Figure 2 to Figure 4 show timing diagrams for a serial write to
the AD5390/AD5391/AD5392 in both standalone and daisy-
chain mode. The 24-bit data-word format for the serial interface
is shown in Table 18 to Table 20. Descriptions of the bits follow
in Table 21.
Table 18. AD5390 16-Channel, 14-Bit DAC Serial Input Register Configuration
MSB
LSB
A
/B
R/
W
0
0
A3
A2
A1
A0
REG1
REG0
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Table 19. AD5391 16-Channel, 12-Bit DAC Serial Input Register Configuration
MSB
LSB
A
/B
R/
W
0
0
A3
A2
A1
A0
REG1
REG0
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
X
X
Table 20. AD5392 8-Channel, 14-Bit DAC Serial Input Register Configuration
MSB
LSB
A
/B
R/
W
0
0
0
A2
A1
A0
REG1
REG0
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Table 21. Serial Input Register Configuration Bit Descriptions
Bit
Description
A/B
When toggle mode is enabled, this bit selects whether the data write is to the A or B register. With toggle mode
disabled, this bit should be set to zero to select the A data register.
R/W
The read or write control bit.
A3 to A0
Used to address the input channels.
REG1 and REG0
Select the register to which data is written, as outlined in Table 10.
DB13 to DB0
Contain the input data-word.
X
Don’t care condition.
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