X9313
AC Operating Characteristics Over recommended operating conditions unless otherwise stated.
LIMITS
TYP
SYMBOL
PARAMETER
MIN
100
100
2.9
1
(Note 4)
MAX
UNIT
ns
t
t
t
CS to INC setup
CI
ID
DI
INC HIGH to U/D change
U/D to INC setup
INC LOW period
ns
µs
t
µs
IL
IH
IC
t
t
INC HIGH period
1
µs
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
1
µs
t
t
20
100
ms
ns
CPH
CPH
t
INC to V change
W
5
µs
IW
t
INC cycle time
2
µs
CYC
t , t (Note 5)
INC input rise and fall time
Power-up to wiper stable
500
50
µs
R
F
t
(Note 5)
10
10
µs
PU
t
V
(Note 5)
V
power-up rate
0.2
V/ms
ms
R
CC
CC
t
(Note 5)
Store cycle
WR
NOTES:
4. Typical values are for T = +25°C and nominal supply voltage.
A
5. This parameter is not 100% tested.
1ms after V
CC
reaches its final value. The V
CC
ramp spec is
Power-Up and Power-Down Requirements
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.
The recommended power-up sequence is to apply V /V
CC SS
first, then the potentiometer voltages. During power-up, the
data sheet parameters for the DCP do not fully apply until
CS
t
CYC
t
t
t
t
t
CPH
CI
IL
IH
IC
90%
90%
INC
U/D
10%
t
t
t
t
R
ID
DI
F
t
IW
(SEE NOTE)
MI
V
W
NOTE: MI IN THE AC TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE V OUTPUT DUE TO A CHANGE IN THE WIPER
W
POSITION.
FIGURE 4. AC TIMING DIAGRAM
FN8177.5
April 18, 2007
7
INTERSIL [ Intersil ]
