AD5544 Analog Devices, AD5544 Datasheet - Page 16

• Manufacturer Part Number: AD5544
• Description: Quad, Current-Output, Serial-Input 16-/14-Bit DACs
• Manufacturer: Analog Devices

Specifications of AD5544

• Resolution (bits): 16bit
• Dac Update Rate: 500kSPS
• Dac Settling Time: 0.9µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

AD5544/AD5554
TRUTH TABLES
Table 8.
CS
High
Low
Low
Low
￪
High
High
High
High
High
1
2
3
4
Table 9.
CS
High
Low
Low
Low
￪
High
High
High
High
High
1
2
3
4
For the AD5544, data appears at the SDO pin 19 clock pulses after input at the SDI pin.
X = don’t care.
￪ + is a positive logic transition.
At power-on, both the input register and the DAC register are loaded with all 0s.
For the AD5554, data appears at the SDO pin 17 clock pulses after input at the SDI pin.
X = don’t care.
￪ + is a positive logic transition.
At power-on, both the input register and the DAC register are loaded with all 0s.
+
+
3
3
AD5544
AD5554
CLK
X
Low
￪
High
Low
X
X
X
X
X
CLK
X
L
￪
High
Low
X
X
X
X
X
+
+
3
3
1
1
LDAC
High
High
High
High
High
Low
High
￪
High
High
LDAC
High
High
High
High
High
Low
High
￪
High
High
Control Logic Truth Table
+
Control Logic Truth Table
+
3
3
RS
High
High
High
High
High
High
High
High
Low
Low
RS
High
High
High
High
High
High
High
High
Low
Low
MSB
X
X
X
X
X
X
X
X
0
High
MSB
X
X
X
X
X
X
X
X
0
High
2
2
Serial Shift Register Function
No effect
No effect
Shift register data advanced one bit
No effect
No effect
No effect
No effect
No effect
No effect
No effect
Serial Shift Register Function
No effect
No effect
Shift register data advanced one bit
No effect
No effect
No effect
No effect
No effect
No effect
No effect
Rev. F | Page 16 of 28
3
3
Input Register Function
Latched
Latched
Latched
Latched
Selected DAC updated with
current shift register contents
Latched
Latched
Latched
Latched data = 0x0000
Latched data = 0x8000
Input Register Function
Latched
Latched
Latched
Latched
Selected DAC updated with
current shift register contents
Latched
Latched
Latched
Latched data = 0x0000
Latched data = 0x2000
3
4
4
DAC Register
Latched
Latched
Latched
Latched
Latched
Transparent
Latched
Latched
Latched data = 0x0000
Latched data = 0x8000
DAC Register
Latched
Latched
Latched
Latched
Latched
Transparent
Latched
Latched
Latched data = 0x0000
Latched data = 0x2000
Data Sheet