AD5255BRU250-RL7 Analog Devices Inc, AD5255BRU250-RL7 Datasheet - Page 12

• Manufacturer Part Number: AD5255BRU250-RL7
• Manufacturer: Analog Devices Inc

Specifications of AD5255BRU250-RL7

• Number Of Elements: 3
• Resistance (max): 250KOhm
• Power Supply Requirement: Single/Dual
• Interface Type: Serial (2-Wire/I2C)
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): ±2.5V
• Single Supply Voltage (min): 2.7V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): ±2.2V
• Dual Supply Voltage (max): ±2.7V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 24
• Lead Free Status / RoHS Status: Not Compliant

AD5255
A random read operation is shown in Figure 21. This operation
changes the address counter to the specified memory address
by performing a dummy write and then performing a read
operation beginning at the new address counter location.
RDAC I
Table 5. RDAC Register Addresses (CMD/ REG = 0, EE/ RDAC = 0)
A4
0
0
0
0
0
0
1
S
S
S
0
0
SLAVE ADDRESS
2
A3
0
0
0
0
0
0
1
C INTERFACE
1
1
RDAC SLAVE ADDRESS
RDAC SLAVE ADDRESS
0
0
. . . to . . .
A2
0
0
0
0
1
1
1
S
1
1
0
1
1
0 WRITE
A1
0
0
1
1
0
0
1
W
1
R
R
A
A
1
1
RDAC SLAVE ADDRESS
0
R
R
A
A
0
A
0
A0
0
1
0
1
0
1
1
0 WRITE
1 READ
1
1
0
RDAC ADDRESS
1
A
A
RDAC
RDAC0
RDAC0
RDAC1
RDAC1
RDAC2
R
A
1
CMD/
REG
RDAC EEPROM OR REGISTER DATA
Figure 25. RDAC Shortcut Command
R
A
0
Figure 24. RDAC Random Read
Figure 23. RDAC Current Read
0 WRITE
0
0
Figure 22. RDAC Write
Byte Description
(D7)(D6)(D5)(D4)(D3)(D2)(D1)(D0) – RDAC0 8 LSBs
(X)(X)(X)(X)(X)(X)(X)(D8) – RDAC0 MSB
(D7)(D6)(D5)(D4)(D3)(D2)(D1)(D0) – RDAC1 8 LSBs
(X)(X)(X)(X)(X)(X)(X)(D8) – RDAC1 MSB
(X)(D6)(D5)(D4)(D3)(D2)(D1)(D0) – RDAC2 7 bits
Reserved
Rev. A | Page 12 of 20
RDAC
EE/
RDAC ADDRESS
A
REPEATED START
A
A
1 CMD
4
S
CMD/
REG
EEPROM Write Protection
Setting the WP pin to a logic low protects the EEPROM mem-
ory from future write operations. In this mode, EEPROM read
operations and RDAC register loading operate normally.
A
3
SLAVE ADDRESS
C
3
A
2
(N BYTES + ACKNOWLEDGE)
C
2
A
1
A
C
1
A
0
1 READ
A
C
0
RDAC EEPROM OR REGISTER DATA
R
A
2
DATA
A
A
1
(N BYTES + ACKNOWLEDGE)
(N BYTES + ACKNOWLEDGE)
A
0
RDAC DATA
A
A
P
DATA
A/A
A/A
A
P
P
P