ISL23415
8
FN7780.1
August 16, 2011
DCP Macro Model
tCS
CS Deselect Time
2
s
NOTES:
8. Typical values are for TA = +25°C and 3.3V supply voltages.
9. 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.
10. ZS error = V(RW)0/LSB.
11. FS error = [V(RW)255 – VCC]/LSB.
12. DNL = [V(RW)i – V(RW)i-1]/LSB-1, for i = 1 to 255. i is the DCP register setting.
13. INL = [V(RW)i – i LSB – V(RW)0]/LSB for i = 1 to 255
14.
for i = 16 to 255 decimal, T = -40°C to +125°C. Max( ) is the maximum value of the wiper voltage
and Min( ) is the minimum value of the wiper voltage over the temperature range.
15. MI =
|RW255 – RW0|/255. MI is a minimum increment. RW255 and RW0 are the measured resistances for the DCP register set to FF hex and 00
hex respectively.
16. Roffset = RW0/MI, when measuring between RW and RL.
Roffset = RW255/MI, when measuring between RW and RH.
17. RDNL = (RWi – RWi-1)/MI -1, for i = 16 to 255.
18. RINL = [RWi – (MI i) – RW0]/MI, for i = 16 to 255.
19.
for i = 16 to 255, T = -40°C to +125°C. Max( ) is the maximum value of the resistance and Min( ) is the
minimum value of the resistance over the temperature range.
20. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Serial Interface Specification For SCK, SDI, SDO, CS Unless Otherwise Noted. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
(Note 20)
TYP
(Note 8)
MAX
(Note 20)
UNITS
TCV
Max V RW
()i
() Min V RW
()i
()
–
VRWi +25°C
()
------------------------------------------------------------------------------
106
+165°C
---------------------
×
=
TCR
Max Ri
() Min Ri
()
–
[]
Ri +25°C
()
-------------------------------------------------------
10
6
+165°C
---------------------
×
=
32pF
RH
RTOTAL
CH
32pF
CW
CL
32pF
RW
RL
Timing Diagrams
Input Timing
...
CS
SCK
SDI
SDO
MSB
LSB
tLEAD
tH
tSU
tFI
tCS
tLAG
tCYC
tWL
...
tRI
tWH