X9318_14 Datasheet, PDF (5/10 Pages) Intersil Corporation – Digitally Controlled Potentiometer

X9318
A.C. OPERATING CHARACTERISTICS
(V_CC = 5V ± 10%, T_A = Full Operating Temperature Range unless otherwise stated)
Symbol
Parameter
Min.
Limits
Typ.⁽⁴⁾
t_Cl
CS to INC setup
100
t_lD⁽⁵⁾ INC HIGH to U/D change
100
t_DI⁽⁵⁾ U/D to INC setup
1
t_lL
INC LOW period
1
t_lH
INC HIGH period
1
t_lC
INC inactive to CS inactive
1
t_CPHS CS deselect time (STORE)
20
t_CPHNS⁽⁵ CS deselect time (NO STORE)
1
)
t_IW
t_CYC
t_R, t_F⁽⁵⁾
t_PU⁽⁵⁾
t_R V_CC⁽⁵⁾
INC to R_W change
INC cycle time
INC input rise and fall time
Power-up to wiper stable
V_CC power-up rate
100
4
0.2
Max.
500
500
500
50
Unit
ns
ns
µs
µs
µs
µs
ms
µs
µs
µs
µs
µs
V/ms
POWER-UP AND DOWN REQUIREMENTS
The recommended power-up sequence is to apply V_CC/V_SS first, then the potentiometer voltages. During power-up,
the data sheet parameters for the DCP do not fully apply until 1 millisecond after V_CC reaches its final value. The V_CC
ramp spec is always in effect. In order to prevent unwanted tap position changes, or an inadvertant store, bring the
CS and INC high before or concurrently with the V_CC pin on powerup.
A.C. TIMING
CS
t_CI
INC
t_CYC
t_IL
t_IH
t_IC
t_ID
t_DI
t_CPHS
90% 90%
10%
t_CPHNS
t_F
t_R
U/D
t_IW
R_W
MI ⁽³⁾
5
FN8184.1
September 14, 2005