AD5273 Analog Devices, AD5273 Datasheet - Page 10

• Manufacturer Part Number: AD5273
• Description: 64-Position OTP Digital Potentiometer
• Manufacturer: Analog Devices

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SDA BITS DEFINITIONS AND DESCRIPTIONS
S = Start Condition
P = Stop Condition
A = Acknowledge
X = Don’t Care
T = OTP Programming Bit. Logic 1 programs wiper position
AD5273
TPC 25. Power-Up Settling Time, after Fuses Blown
permanently.
S
OTP PROGRAMMED AT MS
V
V
R
DD
A
AB
= 5.5V
1V
0
= 5.5V
= 10k
1
SLAVE ADDRESS BYTE
5V
0
SCL
1
SDA
S
1
0
P
0
t
1
1
A0
S
SLAVE ADDRESS BYTE
0
t
2
0
5 s
t
8
1
t
A
3
1
t
Table II. SDA Read Mode Bit Format
Table I. SDA Write Mode Bit Format
Figure 1. Interface Timing Diagram
8
T
V
V
0
W
DD
= 1V/DIV
X
= 5V/DIV
A0
t
9
INSTRUCTION BYTE
X
1
X
t
4
A
–10–
t
9
X
E1
D5, D4, D3, D2, D1, D0 = Data Bits
E1, E0 = OTP Validation Bits
X
0, 0 = Ready to Program
0, 1 = Test Fuse not Blown Successfully. (Check Setup.)
1, 0 = Fatal Error. Retry.
1, 1 = Programmed Successfully. No Further Adjustments
t
E0
5
X
D5
0.01
1.0
0.1
Possible.
10
X
DATA BYTE
0
D4
t
6
A
t
7
D3
8
TPC 26. I
X
D2
16
X
D1
D5
24
CODE – Decimal
WB_MAX
D0
DATA BYTE
R
D4
AB
32
A
= 1k
R
R
R
P
AB
D3
AB
AB
vs. Code
= 50k
= 10k
= 100k
P
40
t
10
D2
D1
V
T
48
A
A
= 25 C
= V
D0
B
= OPEN
56
A
64
REV. 0
P