X9319_14 Datasheet, PDF (4/8 Pages) Intersil Corporation – Digitally Controlled Potentiometer

X9319
Test Circuit
TEST POINT
R_W
FORCE
CURRENT
Equivalent Circuit
R_TOTAL
R_H
C_H
C_W
C_L ^RL
10pF
10pF
25pF
R_W
AC Conditions of Test
Input pulse levels
Input rise and fall times
Input reference levels
0.8V to 2V
10ns
1.4V
A.C. Operating Characteristics V_CC = 5V ±10%. Boldface limits apply across the operating temperature range, -40°C to +85°C
(Industrial) and 0°C to +70°C (Commercial).
SYMBOL
PARAMETER
MIN
(Note 7)
TYP
(Note 8)
MAX
(Note 7)
UNIT
t_Cl
CS to INC setup
100
ns
t_lD (Note 9) INC HIGH to U/D change
100
ns
t_DI (Note 9) U/D to INC setup
1
µs
t_lL
INC LOW period
1
µs
t_lH
INC HIGH period
1
µs
t_lC
INC inactive to CS inactive
1
µs
t_CPHS CS deselect time (STORE)
20
ms
t_CPHNS CS deselect time (NO STORE)
1
µs
(Note 9)
t_IW (Note 9) INC to R_W change
t_CYC
INC cycle time
t_R, t_F
INC input rise and fall time
(Note 9)
100
500
µs
4
µs
500
µs
t_PU (Note 9) Power-up to wiper stable
t_R V_CC VCC power-up rate
(Note 9)
500
µs
0.2
50
V/ms
NOTES:
4. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = [V(R_W(n)(actual)) - V(R_{W(n)(expected)})]/MI
V(R_{W(n)(expected)}) = n(V(R_H) - V(R_L))/99 + V(R_L), with n from 0 to 99.
5. Relative linearity is a measure of the error in step size between taps = [V(R_W(n+1)) - (V(R_W(n)) - MI)]/MI.
6. 1 Ml = Minimum Increment = [V(R_H) - V(R_L)]/99.
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
8. Typical values are for T_A = +25°C and nominal supply voltage.
9. Guaranteed by device characterization.
10. Ratiometric temperature coefficient = (V(R_W)_T1(n) - V(R_W)_T2(n))/[V(R_W)_T1(n)(T1 - T2) x 10⁶], with T1 and T2 being 2 temperatures, and n from
0 to 99.
11. Measured with wiper at tap position 31, R_L grounded, using test circuit.
Power-Up and Down Requirements
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. The potentiometer
voltages must be applied after this sequence is completed.
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.
Submit Document Feedback
4
FN8185.3
July 31, 2014