AD5554BRS Analog Devices Inc, AD5554BRS Datasheet - Page 13

• Manufacturer Part Number: AD5554BRS
• Description: IC DAC 14BIT QUAD SERIAL 28-SSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5554BRS

• Rohs Status: RoHS non-compliant
• Settling Time: 2µs
• Number Of Bits: 14
• Data Interface: Serial
• Number Of Converters: 4
• Voltage Supply Source: Dual ±
• Power Dissipation (max): 1.25mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP

TRUTH TABLES
Table 8. AD5544
CS
High
Low
Low
Low
￪
High
High
High
High
High
1
2
3
4
Table 9. AD5554
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.
￪ + 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.
￪ + positive logic transition.
At power-on, both the input register and the DAC register are loaded with all 0s.
+
+
3
3
CLK
X
Low
￪
High
Low
X
X
X
X
X
CLK
X
L
￪
High
Low
X
X
X
X
X
+
+
3
3
1
LDAC
High
High
High
High
High
Low
High
￪
High
High
1
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
0
High
MSB
X
X
X
X
X
X
X
X
0
High
X
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. D | Page 13 of 16
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
AD5544/AD5554
DAC Register
Latched
Latched
Latched
Latched
Latched
Transparent
Latched
Latched
Latched data = 0x0000
Latched data = 0x8000
DAC Register
Latched
Transparent
Latched data = 0x0000
Latched data = 0x2000
Latched
Latched
Latched
Latched
Latched
Latched