ISL22429 Datasheet, PDF (5/13 Pages) Intersil Corporation – Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only

ISL22449
Operating Specifications Over the recommended operating conditions unless otherwise specified. Parameters with MIN and/or MAX
limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
TYP
MIN (Note 3) MAX
UNIT
V_IH
SHDN, SCK, SDI, and CS input buffer
HIGH voltage
0.7*V_CC
V_CC+0.3
V
Hysteresis SHDN, SCK, SDI, and CS input buffer
hysteresis
V_OL
R_pu
(Note 12)
SDO output buffer LOW voltage
SDO pull-up resistor off-chip
I_OL = 4mA
Maximum is determined by t_RO and t_FO with
maximum bus load Cbus = 30pF, f_SCK =
5MHz
0.05*
V_CC
0
V
0.4
V
2
kΩ
Cpin SHDN, SCK, SDI, SDO and CS pin
(Note 13) capacitance
10
pF
f_SCK
t_CYC
t_WH
t_WL
t_LEAD
t_LAG
t_SU
t_H
t_RI
t_FI
t_DIS
t_V
t_HO
t_RO
t_FO
t_CS
t_WRT
SPI frequency
SPI clock cycle time
SPI clock high time
SPI clock low time
Lead time
Lag time
SDI, SCK and CS input setup time
SDI, SCK and CS input hold time
SDI, SCK and CS input rise time
SDI, SCK and CS input fall time
SDO output Disable time
SDO output valid time
SDO output hold time
SDO output rise time
SDO output fall time
CS deselect time
R_pu = 2k, Cbus = 30pF
R_pu = 2k, Cbus = 30pF
Wiper Response Time after SPI write
to WR register
5
MHz
200
ns
100
ns
100
ns
250
ns
250
ns
50
ns
50
ns
10
ns
10
20
ns
0
100
ns
350
ns
0
ns
60
ns
60
ns
2
µs
1.5
µs
NOTES:
3. Typical values are for T_A = +25°C and 3.3V supply voltage.
4. LSB: [V(R_W)₁₂₇ – V(R_W)₀]/127. V(R_W)₁₂₇ and V(R_W)₀ are V(R_W) for the DCP register set to 7F hex and 00 hex respectively. LSB is the
incremental voltage when changing from one tap to an adjacent tap.
5. ZS error = V(RW)₀/LSB.
6. FS error = [V(RW)₁₂₇ – V_CC]/LSB.
7. DNL = [V(RW)_i – V(RW)_i-1]/LSB-1, for i = 1 to 127. i is the DCP register setting.
8. INL = [V(RW)_i – i • LSB – V(RW)]/LSB for i = 1 to 127
9. V_MATCH = [V(RWx)_i – V(RWy)_i]/LSB, for i = 1 to 127, x = 0 to 3 and y = 0 to 3.
10.
TC_V
=
-------^M-----^a----^x----⁽--^V----⁽---^R-----^W------⁾--ⁱ--⁾---–-----^M-----ⁱ--ⁿ----⁽--^V-----⁽--^R-----^W------⁾--ⁱ--⁾------ × ----¹---⁰----⁶----- ^{for i = 16 to 112 decimal, T = -40°C to +125°C. Max( ) is the maximum value of the wiper}
[Max(V(RW)_i) + Min(V(RW)_i)] ⁄ 2 165°C voltage and Min ( ) is the minimum value of the wiper voltage over the temperature range.
11. 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.
12. R_pu is specified for the highest data rate transfer for the device. Higher value pullup can be used at lower data rates.
13. This parameter is not 100% tested.
5
FN6333.3
July 17, 2009