X9312A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified) LimitsSymbolParameterMin.Typ.6Max.Unit tCl CS to INC setup 100 ns tlD INC HIGH to U/D change 100 ns tDI U/D to INC setup 1 µs tlL INC LOW period 1 µs tlH INC HIGH period 1 µs tlC INC inactive to CS inactive 1 µs tCPH CS deselect time (STORE) 20 ms tCPH CS deselect time (NO STORE) 100 ns tIW INC to Vw change 100 500 µs tCYC INC cycle time 4 µs t 7 R, tF INC input rise and fall time 500 µs t 7 PU Power-up to wiper stable 500 µs t 7 R VCC VCC power-up rate 0.2 50 V/ms POWER-UP AND DOWN REQUIREMENTS There are no restrictions on the sequencing of VCC and the voltages applied to the potentiometer pins during power- up or power-down conditions. During power-up, the data sheet parameters for the DCP do not fully apply until 1 millisecond after VCC reaches is final value. The VCC ramp spec is always in effect. A.C. TIMING CS tCYC tCI tIL tIH tIC tCPH 90% 90% INC 10% tID tDI tF tR U/D tIW (8) V MI W Notes: (6) Typical values are for TA = 25°C and nominal supply voltage. (7) This parameter is sample tested. (8) MI in the A.C. timing diagram refers to the minimum incremental change in the VW output due to a change in the wiper position. 6 FN8176.0 March 15, 2005
