AD5781ARUZ-REEL7 Analog Devices Inc, AD5781ARUZ-REEL7 Datasheet - Page 23

• Manufacturer Part Number: AD5781ARUZ-REEL7
• Description: 18bit, 4LSB, Unbuffered Ref
• Manufacturer: Analog Devices Inc

Specifications of AD5781ARUZ-REEL7

• Design Resources: 18-Bit Accurate, low noise, precision bipolar DC voltage source (CN0177)
• Settling Time: 1µs
• Number Of Bits: 18
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Software Control Register
This is a write only register in which writing a 1 to a particular bit has the same effect as pulsing the corresponding pin low.
Table 14. Software Control Register
MSB
DB23
R/ W
0
1
2
Table 15. Software Control Register Functions
Function
LDAC
CLR
RESET
The CLR function has no effect if the LDAC pin is low.
The LDAC function has no effect if the CLR pin is low.
Description
Setting this bit to 1 updates the DAC register and consequently the DAC output.
Setting this bit to 1 sets the DAC register to a user defined value (see Table 13) and updates the DAC output. The output
value depends on the DAC register coding that is being used, either binary or twos complement.
Setting this bit to 1 returns the AD5781 to its power-on state.
DB22
1
Register address
DB21
0
DB20
0
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DB19
Reserved
DB3
Software control register data
DB2
RESET
DB1
CLR
1
DB0
LDAC
AD5781
2
LSB