X95840 Datasheet, PDF (6/13 Pages) Intersil Corporation – Quad Digital Controlled Potentiometers

WP, A0, A1, and A2 Pin Timing
START
SCL
X95840
Clk 1
STOP
SDA IN
WP, A0, A1, or A2
t_SU:WPA
t_HD:WPA
NOTES:
1. Typical values are for T_A = 25°C and 3.3V supply voltage.
2. LSB: [V(RW)₂₅₅ - V(RW)₀] / 255. V(RW)₂₅₅ and V(RW)₀ are V(RW) for the DCP register set to FF hex and 00 hex respectively. LSB is the
incremental voltage when changing from one tap to an adjacent tap.
3. ZS error = V(RW)₀ / LSB.
4. FS error = [V(RW)₂₅₅ - V_CC] / LSB.
5. DNL = [V(RW)_i - V(RW)_i-1] / LSB-1, for i = 1 to 255. i is the DCP register setting.
6. INL = [V(RW)_i – (i • LSB – V(RW)₀)]/LSB for i = 1 to 255.
7. V_MATCH = [V(RWx)_i - V(RWy)_i] / LSB, for i = 0 to 255, x = 0 to 3 and y = 0 to 3.
8.
TC_V
=
-------^M-----^a----^x----⁽--^V----⁽---^R-----^W------⁾--ⁱ--⁾---–-----^M-----ⁱ--ⁿ----⁽--^V-----⁽--^R-----^W------⁾--ⁱ--⁾------ × ----¹---⁰----⁶-----
[Max(V(RW)_i) + Min(V(RW)_i)] ⁄ 2 125°C
for i = 16 to 240 decimal, T = -40°C to 85°C. Max( ) is the maximum value of the wiper voltage and Min ( ) is the minimum value of the wiper
voltage over the temperature range.
9. MI = |R₂₅₅ - R₀| / 255. R₂₅₅ and R₀ are the measured resistances for the DCP register set to FF hex and 00 hex respectively.
10. Roffset = R₀ / MI, when measuring between RW and RL.
Roffset = R₂₅₅ / MI, when measuring between RW and RH.
11. RDNL = (R_i - R_i-1) / MI, for i = 32 to 255.
12. RINL = [R_i - (MI • i) - R₀] / MI, for i = 32 to 255.
13. R_MATCH = (R_i,x - R_i,y) / MI, for i = 0 to 255, x = 0 to 3 and y = 0 to 3.
14.
TC_R
=
----^[---^M-----^a----^x----⁽--^R-----ⁱ--⁾---–-----^M-----ⁱ--ⁿ----⁽--^R-----ⁱ--⁾--^]---- × ----¹----⁰---⁶-----
[Max(Ri) + Min(Ri)] ⁄ 2 125°C
for i = 32 to 255, T = -40°C to 85°C. Max( ) is the maximum value of the resistance and Min ( ) is the minimum value of the resistance over the
temperature range.
15. This parameter is not 100% tested.
16. t_WC is the minimum cycle time to be allowed for any non-volatile Write by the user, unless Acknowledge Polling is used. It is the time from a
valid STOP condition at the end of a Write sequence of a 2-wire serial interface Write operation, to the end of the self-timed internal non-volatile
write cycle.
6
FN8213.1
September 27, 2005