X9258 Datasheet, PDF (13/22 Pages) Xicor Inc. – Quad Digital Controlled Potentiometers (XDCP)

X9258
D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Symbol
I_CC1
I_CC2
I_SB
I_LI
I_LO
V_IH
V_IL
V_OL
Parameter
V_CC supply current (Non-
volatile Write)
V_CC supply current (move
wiper, write, read)
V_CC current (standby)
Input leakage current
Output leakage current
Input HIGH voltage
Input LOW voltage
Output LOW voltage
Min.
V_CC x 0.7
–0.5
Limits
Typ. Max.
1
100
5
10
10
V_CC + 0.1
V_CC x 0.3
0.4
Unit
mA
µA
µA
µA
µA
V
V
V
Test Conditions
f_SCL = 400kHz, SDA = Open,
Other Inputs = V_SS
f_SCL = 400kHz, SDA = Open,
Other Inputs = V_SS
SCL = SDA = V_CC, Addr. = V_SS
V_IN = V_SS to V_CC
V_OUT = V_SS to V_CC
I_OL = 3mA
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 potenti-
ometer. It is a measure of the error in step size.
(3) MI = RTOT/255 or (V_H/R_H—V_L/R_L)/255, single pot
(4) Max. = all four arrays cascaded together, Typical = individual array resolutions.
ENDURANCE AND DATA RETENTION
Parameter
Minimum endurance
Data retention
Min.
100,000
100
Unit
Data changes per bit per register
years
CAPACITANCE
Symbol
C_I/O⁽⁵⁾
C_IN⁽⁵⁾
Test
Input/output capacitance (SDA)
Input capacitance (A0, A1, A2, A3, and SCL)
Max.
8
6
Unit
pF
pF
Test Conditions
V_I/O = 0V
V_IN = 0V
POWER-UP TIMING
Symbol
t_PUR⁽⁶⁾
t_PUW⁽⁶⁾
t_R V_CC⁽⁷⁾
Parameter
Power-up to initiation of read operation
Power-up to initiation of write operation
V_CC Power up ramp
Min.
0.2
Max.
1
5
50
Unit
ms
ms
V/msec
POWER UP AND DOWN REQUIREMENT
The are no restrictions on the sequencing of the bias supplies V_CC, V+, and V- provided that all three supplies
reach their final values within 1msec of each other. At all times, the voltages on the potentiometer pins must be less
than V+ and more than V-. The recall of the wiper position from nonvolatile memory is not in effect until all supplies
reach their final value. The V_CC ramp rate spec is always in effect.
Notes: (5) This parameter is periodically sampled and not 100% tested.
(6) 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.
(7) Sample tested only.
REV 1.1.7 2/4/03
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Characteristics subject to change without notice. 13 of 22