X95820_06 Datasheet, PDF (6/12 Pages) Intersil Corporation – Dual Digital Controlled Potentiometers

X95820
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 1 and y = 0 to 1.
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 1 and y = 0 to 1.
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
valid STOP condition at the end of a
allowed for any non-volatile Write by the
Write sequence of a I²C serial interface
user,
Write
unless Acknowledge
operation, to the end
Polling is used. It is the time from a
of the self-timed internal non-volatile
write cycle.
Typical Performance Curves
160
V_CC = 2.7, T = 85°C
140
V_CC = 2.7, T = -40°C
V_CC = 2.7, T = 25°C
120
100
80
60
40
20
V_CC = 5.5, T = 85°C
V_CC = 5.5, T = -40°C _{VCC = 5.5, T = 25°C}
0
0
50
100
150
200
250
TAP POSITION (DECIMAL)
FIGURE 1. WIPER RESISTANCE vs TAP POSITION
[ I(RW) = V_CC/R_TOTAL ] FOR 50kΩ (U)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2.7
-40°C
85°C
25°C
3.2
3.7
4.2
4.7
5.2
V_CC (V)
FIGURE 2. STANDBY I_CC vs V_CC
6
FN8212.2
July 18, 2006