X9313_08 Datasheet, PDF (7/12 Pages) Intersil Corporation – Digitally Controlled Potentiometer (XDCP™)

X9313
AC Electrical Specifications Over recommended operating conditions, unless otherwise stated.
LIMITS
SYMBOL
PARAMETER
TYP
MIN
(Note 4)
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 5) INC Input Rise and Fall Time
t_PU (Note 5) Power-up to Wiper Stable
t_R V_CC (Note 5) V_CC Power-up Rate
t_WR (Note 5) Store Cycle
NOTES:
4. Typical values are for T_A = +25°C and nominal supply voltage.
5. This parameter is not 100% tested.
100
100
2.9
1
1
1
20
100
5
2
10
0.2
10
MAX
500
50
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
1ms after V_CC reaches its final value. The V_CC ramp
specification 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.
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
(SEE NOTE)
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.
FIGURE 4. AC TIMING DIAGRAM
7
FN8177.6
January 15, 2008