AD5392 Analog Devices, AD5392 Datasheet - Page 24

• Manufacturer Part Number: AD5392
• Description: 8-Channel 14-Bit Single-Supply Voltage-Output DAC
• Manufacturer: Analog Devices

Specifications of AD5392

• Resolution (bits): 14bit
• Dac Update Rate: 125kSPS
• Dac Settling Time: 8µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: I2C/Ser 2-wire,Ser,SPI

AD5390/AD5391/AD5392
INTERFACES
The AD5390/AD5391/AD5392 contain a serial interface that
can be programmed to be DSP-, SPI-, and MICROWIRE-
compatible, or I
the interface mode.
To minimize both the power consumption of the device and the
on-chip digital noise, the interface fully powers up 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
Table 18. AD5390 16-Channel, 14-Bit DAC Serial Input Register Configuration
MSB
A /B
Table 19. AD5391 16-Channel, 12-Bit DAC Serial Input Register Configuration
MSB
A /B
Table 20. AD5392 8-Channel, 14-Bit DAC Serial Input Register Configuration
MSB
A /B
Table 21. Serial Input Register Configuration Bit Descriptions
Bit
A/B
R/W
A3 to A0
REG1 and
REG0
DB13 to
DB0
X
R/ W 0
R/ W
R/ W 0
0
Description
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.
The read or write control bit.
Used to address the input channels.
Select the register to which data is written, as outlined in Table 10.
Contain the input data-word.
Don’t care condition.
2
0
0
C-compatible. The SPI/ I
0
0
A3 A2 A1
A3
A2
A2
A1
A1
A0 REG1
A0
A0
REG1
REG1
2
2
C pin is used to select
C pin is tied to a
REG0
REG0
REG0
DB11
DB13
DB13
DB10
DB12
Rev. C | Page 24 of 40
DB12
DB11
DB9
DB11
Logic 1 pin to configure this mode of operation. The serial
interface control pins are described in
Table 17. Serial Interface Control Pins
Pin
SYNC, DIN, SCLK
DCEN
SDO
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.
DB8
DB10
DB10
DB7
DB9
DB9
DB6
DB8
DB8
DB5
Description
Standard 3-wire interface pins.
Selects standalone mode or daisy-chain mode.
Data out pin for daisy-chain mode.
DB7
DB7
DB4
DB6
DB6
DB5
DB3
DB5
DB4
Table 17
DB2
DB4
DB3
DB3
DB1
.
DB2
DB2
DB0
DB1
DB1 DB0
X
LSB
X
LSB
DB0
LSB