X9252 Xicor, X9252 Datasheet - Page 8

• Manufacturer Part Number: X9252
• Description: Quad Digitally-Controlled (XDCP) potentiometer
• Manufacturer: Xicor

HIGH-VOLTAGE WRITE CYCLE TIMING
XDCP TIMING
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = [V(R
Test Circuit
REV 1.4.1 7/29/03
t
t
WC
WRL
Symbol
Symbol
(8)(5)
(5)
(2) Relative linearity is a measure of the error in step size between taps = [V(R
(3) 1 Ml = Minimum Increment = [V(R
(4) Typical values are for T
(5) This parameter is not 100% tested.
(6) Ratiometric temperature coefficient = (V(R
(7) Measured with wiper at tap position 255, R
(8) t
(9) The recommended power up sequence is to apply V
V(R
n from 0 to 255.
from a valid STOP condition at the end of a write sequence of a 2-wire interface write operation, or from the rising edge of CS of a
valid “Store” operation of the Up/Down interface, to the end of the self-timed internal nonvolatile write cycle.
parameters for the DCP do not fully apply until t
changes, or an inadvertant store, bring the CS pin high before or concurrently with the V
WC
W(n)(expected)
is the minimum cycle time to be allowed for any nonvolatile write by the user, unless Acknowledge Polling is used. It is the time
Non-volatile write cycle time
SCL rising edge to wiper code changed, wiper response time after
instruction issued (all load instructions)
R
W
Test Point
Force
Current
) = n(V(R
A
= 25°C and nominal supply voltage.
H
)-V(R
L
H
))/255 + V(R
)–V(R
Equivalent Circuit
Parameter
Parameter
R
L
H
)]/255.
W
L
grounded, using test circuit.
)
T1(n)
L
), with n from 0 to 255.
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–V(R
D
C
CC
after V
H
W
/V
R
)
T2(n)
SS
TOTAL
R
CC
W
first, then the potentiometer voltages. During power up, the data sheet
)/[V(R
C
reaches its final value. In order to prevent unwanted tap position
W
W
)
T1(n)
C
W(n+1)
L
(T1–T2)] x 10
R
L
)–(V(R
CC
W(n)
6
Typ.
, with T1 & T2 being 2 temperatures, and
Min.
pin on power up.
) + MI)]/MI , with n from 0 to 254
5
5
W(n)(actual)
)–V(R
Max.
Max.
10
20
W(n)(expected)
X9252
Units
Units
ms
µs
)]/MI
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