AD5274BCPZ-100-RL7 Analog Devices Inc, AD5274BCPZ-100-RL7 Datasheet - Page 19

• Manufacturer Part Number: AD5274BCPZ-100-RL7
• Description: 256 Tap 5v 50tp, 1% R-tol MSOP 12C I.C.
• Manufacturer: Analog Devices Inc

Specifications of AD5274BCPZ-100-RL7

• Resistance (ohms): 100K
• Taps: 256
• Number Of Circuits: 1
• Temperature Coefficient: 5 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V, ±2.5 V ~ 2.75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AD5274BCPZ-100-RL7; AD5274BCPZ-100-RL7TR

WRITE OPERATION
It is possible to write data for the RDAC register or the control
register. When writing to the AD5272/AD5274, the user must
begin with a start command followed by an address byte (R/ W
= 0), after which the AD5272/AD5274 acknowledges that it is
prepared to receive data by pulling SDA low.
SDA
SDA
SCL
SCL
START BY
MASTER
START BY
MASTER
0
1
0
1
1
1
SERIAL BUS ADDRESS BYTE
SERIAL BUS ADDRESS BYTE
0
0
SDA
SDA (CONTINUED)
SDA (CONTINUED)
SCL
SCL (CONTINUED)
SCL (CONTINUED)
FRAME 1
SDA (CONTINUED)
SCL (CONTINUED)
FRAME 1
1
1
(CONTINUED)
(CONTINUED)
1
1
A1
A1
A0
A0
Figure 43. Write Command
Figure 44. Multiple Write
Rev. C | Page 19 of 28
R/W
AD5272/AD5274
9
9
9
R/W
AD5272 2 /AD5274
9
ACK. BY
ACK. BY
D7
0
D7
1
1
1
9
D7
1
9
D6
D6
1
0
0
Two bytes of data are then written to the RDAC, the most
significant byte followed by the least significant byte; both of
these data bytes are acknowledged by the AD5272/AD5274. A
stop condition follows. The write operations for the AD5272/
AD5274 are shown in Figure 43.
A repeated write function gives the user flexibility to update the
device a number of times after addressing the part only once, as
shown in Figure 44.
D6
0
1
LEAST SIGNIFICANT DATA BYTE
LEAST SIGNIFICANT DATA BYTE
MOST SIGNIFICANT DATA BYTE
D5
D5
C3
LEAST SIGNIFICANT DATA BYTE
0
D5
0
MOST SIGNIFICANT DATA BYTE
C3
D4
D4
C2
MOST SIGNIFICANT DATA BYTE
C3
D4
FRAME 5
FRAME 3
FRAME 4
FRAME 3
C2
D3
C1
D3
C2
D3
FRAME 2
FRAME 2
C1
D2
D2
C0
C1
D2
C0
D1
D1
D9
C0
D1
AD5272/AD5274
AD5272 2 /AD5274
D9
D0
D0
D8
ACK. BY
D9
D0
ACK. BY
AD5272 2 /AD5274
AD5272 2 /AD5274
ACK. BY
ACK. BY
AD5272/AD5274
D8
9
9
9
AD5272/AD5274
D8
9
AD5272 2 /AD5274
ACK. BY
ACK. BY
STOP BY
MASTER
9
STOP BY
MASTER
9