X9313
AC Operating Characteristics
Over recommended operating conditions unless otherwise stated.
LIMITS
SYMBOL
t
CI
t
ID
t
DI
t
IL
t
IH
t
IC
t
CPH
t
CPH
t
IW
t
CYC
t
R
, t
F
(Note 5)
t
PU
(Note 5)
t
R
V
CC
(Note 5)
t
WR
(Note 5)
NOTES:
4. Typical values are for T
A
= +25°C and nominal supply voltage.
5. This parameter is not 100% tested.
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
INC to V
W
change
INC cycle time
INC input rise and fall time
Power-up to wiper stable
V
CC
power-up rate
Store cycle
0.2
10
10
50
2
500
PARAMETER
MIN
100
100
2.9
1
1
1
20
100
5
TYP
(Note 4)
MAX
UNIT
ns
ns
µs
µs
µs
µs
ms
ns
µs
µs
µs
µs
V/ms
ms
Power-Up and Power-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
CS
1ms 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 inadvertent store, bring the CS and INC high
before or concurrently with the VCC pin on power-up.
t
CYC
t
CI
INC
t
IL
t
IH
t
IC
t
CPH
90%
10%
t
ID
U/D
t
DI
t
F
t
R
90%
t
IW
MI
V
W
NOTE: MI IN THE AC TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE V
W
OUTPUT DUE TO A CHANGE IN THE WIPER
POSITION.
(SEE NOTE)
FIGURE 4. AC TIMING DIAGRAM
7
FN8177.5
April 18, 2007
INTERSIL [ INTERSIL CORPORATION ]
