ISL22414 Datasheet, PDF (6/16 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer

ISL22414
Operating Specifications Over the recommended operating conditions unless otherwise specified. Boldface limits apply over the
operating temperature range. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
(Note 18) (Note 4) (Note 18) UNIT
R_pu SDO Pull-up Resistor Off-chip
(Note 17)
Cpin
SCK, SDI, SDO and CS Pin
Capacitance
Maximum is determined by t_RO and t_FO with
maximum bus load Cb = 30pF, f_SCK = 5MHz
2
kΩ
10
pF
f_SCK SPI Frequency
5
MHz
t_CYC SPI Clock Cycle Time
200
ns
t_WH SPI Clock High Time
100
ns
t_WL
SPI Clock Low Time
100
ns
t_LEAD Lead Time
250
ns
t_LAG Lag Time
250
ns
t_SU
SDI, SCK and CS Input Setup Time
50
ns
t_H
SDI, SCK and CS Input Hold Time
50
ns
t_RI
SDI, SCK and CS Input Rise Time
10
ns
t_FI
SDI, SCK and CS Input Fall Time
10
20
ns
t_DIS SDO output Disable Time
0
100
ns
t_SO
SDO Output Setup Time
50
ns
t_V
SDO Output Valid Time
150
ns
t_HO
SDO Output Hold Time
0
ns
t_RO
SDO Output Rise Time
R_pu = 2k, Cbus = 30pF
60
ns
t_FO
SDO Output Fall Time
R_pu = 2k, Cbus = 30pF
60
ns
t_CS
CS Deselect Time
2
µs
NOTES:
4. Typical values are for T_A = +25°C and 3.3V supply voltage.
5. 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.
6. ZS error = V(RW)₀/LSB.
7. FS error = [V(RW)₂₅₅ – V_CC]/LSB.
8. DNL = [V(RW)_i – V(RW)_i-1]/LSB-1, for i = 1 to 255. i is the DCP register setting.
9. INL = [V(RW)_i – i • LSB – V(RW)]/LSB for i = 1 to 255
10.
TC_V
=
-------^M-----^a----^x----⁽--^V----⁽---^R-----^W------⁾--ⁱ--⁾---–-----^M-----ⁱ--ⁿ----⁽--^V-----⁽--^R-----^W------⁾--ⁱ--⁾------
[Max(V(RW)_i) + Min(V(RW)_i)] ⁄ 2
×
---¹----⁰---⁶----
ΔT°C
for i = 16 to 255 decimal, T = -40°C to +125°C or T = -55°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.
11. 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.
12. Roffset = RW₀/MI, when measuring between RW and RL.
Roffset = RW₂₅₅/MI, when measuring between RW and RH.
13. RDNL = (RW_i – RW_i-1)/MI -1, for i = 1 to 255.
14. RINL = [RW_i – (MI • i) – RW₀]/MI, for i = 1 to 255.
15.
TC_R
=
----^[---^M-----^a----^x----⁽--^R-----ⁱ-⁾----–-----^M-----ⁱ--ⁿ----⁽--^R-----ⁱ--⁾--^]----
[Max(Ri) + Min(Ri)] ⁄ 2
×
---¹----⁰---⁶----
ΔT°C
for i = 16 to 255, T = -40°C to +125°C or T = -55°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.
16. t_WC is the time from the end of a Write sequence of SPI serial interface, to the end of the self-timed internal non-volatile write cycle.
17. R_pu is specified for the highest data rate transfer for the device. Higher value pull-up can be used at lower data rates.
18. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
6
FN6424.1
December 16, 2010