12
FN8194.3
October 12, 2006
D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
(2) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a
potentiometer. It is a measure of the error in step size.
(3) MI = RTOT/63 or (R
H
- R
L
)/63, single pot
ENDURANCE AND DATA RETENTION
CAPACITANCE
POWER-UP TIMING
Power Up Requirements (Power up sequencing can affect correct recall of the wiper registers)
The preferred power-on sequence is as follows: First V
CC
, then V+ and V-, and then the potentiometer pins, R
H
, R
L
,
and R
W
. Voltage should not be applied to the potentiometer pins before V+ or V- is applied. The V
CC
ramp rate
specification should be met, and any glitches or slope changes in the V
CC
line should be held to <100mV if possible.
If V
CC
powers down, it should be held below 0.1V for more than 1 second before powering up again in order for
proper wiper register recall. Also, V
CC
should not reverse polarity by more than 0.5V. Recall of wiper position will not
be complete until V
CC
, V+ and V- reach their final value.
Notes: (4) This parameter is periodically sampled and not 100% tested
(5) t
PUR
and t
PUW
are the delays required from the time the third (last) power supply (V
CC
, V+ or V-) is stable until the specific
instruction can be issued. These parameters are periodically sampled and not 100% tested.
(6) This is a tested or guaranteed parameter and should only be used as a guidance.
Symbol Parameter
Limits
Test ConditionsMin. Typ. Max. Unit
I
CC1
V
CC
supply current
(nonvolatile write)
1mAf
SCL
= 400kHz, SDA = Open,
Other Inputs = V
SS
I
CC2
V
CC
supply current
(move wiper, write, read)
100 µA f
SCL
= 400kHz, SDA = Open,
Other Inputs = V
SS
I
SB
V
CC
current (standby) 1 µA SCL = SDA = V
CC
, Addr. = V
SS
I
LI
Input leakage current 10 µA V
IN
= V
SS
to V
CC
I
LO
Output leakage current 10 µA V
OUT
= V
SS
to V
CC
V
IH
Input HIGH voltage V
CC
x 0.7 V
CC
+ 0.5 V
V
IL
Input LOW voltage -0.5 V
CC
x 0.1 V
V
OL
Output LOW voltage 0.4 V I
OL
= 3mA
Parameter Min. Unit
Minimum endurance 100,000 Data changes per bit per register
Data retention 100 Years
Symbol Test Max. Unit Test Conditions
C
I/O
(4)
Input/output capacitance (SDA) 8 pF V
I/O
= 0V
C
IN
(4)
Input capacitance (A0, A1, A2, A3, and SCL) 6 pF V
IN
= 0V
Symbol Parameter Min. Typ. Max. Unit
t
PUR
(5)
Power-up to initiation of read operation 1 ms
t
PUW
(5)
Power-up to initiation of write operation 5 ms
t
R
V
CC
(6)
V
CC
Power up ramp rate 0.2 50 V/msec
X9418
