X9313 Datasheet, PDF (8/11 Pages) Xicor Inc. – E2POT™ Nonvolatile Digital Potentiometer

X9313
AC Operating Characteristics Over recommended operating conditions unless otherwise stated.
LIMITS
SYMBOL
PARAMETER
TYP
MIN
(Note 6)
t_CI
CS to INC setup
t_ID
INC HIGH to U/D change
t_DI
U/D to INC setup
t_IL
INC LOW period
t_IH
INC HIGH period
t_IC
INC inactive to CS inactive
t_CPH
CS deselect time (STORE)
t_CPH
CS deselect time (NO STORE)
t_IW
INC to V_W change
t_CYC
INC cycle time
t_R, t_F (Note 7) INC input rise and fall time
t_PU (Note 7) Power-up to wiper stable
t_R V_CC (Note 7) V_CC power-up rate
t_WR
Store cycle
NOTES:
6. Typical values are for T_A = 25°C and nominal supply voltage.
7. This parameter is not 100% tested.
100
100
2.9
1
1
1
20
100
1
4
0.2
5
MAX
5
500
5
50
10
UNIT
ns
ns
µs
µs
µs
µs
ms
ns
µs
µs
µs
µs
V/ms
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
AC Timing
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 V_CC pin on power-
up.
CS
t_CI
INC
U/D
t_CYC
t_IL
t_IH
t_IC
t_ID
t_DI
t_CPH
90% 90%
10%
t_F
t_R
t_IW
V_W
(SEE NOTE)
MI
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.
8
FN8177.2
September 9, 2005