ISL22449WFV14Z-TK Intersil, ISL22449WFV14Z-TK Datasheet - Page 8

• Manufacturer Part Number: ISL22449WFV14Z-TK
• Description: IC POT DGTL 128TP LN LP 14-TSSOP
• Manufacturer: Intersil
• Series: XDCP™r

Specifications of ISL22449WFV14Z-TK

• Taps: 128
• Resistance (ohms): 10K
• Number Of Circuits: 4
• Temperature Coefficient: 50 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Resistance In Ohms: 10K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Curves
Pin Description
Potentiometers Pins
RWI (I = 0, 1, 2, 3)
RWi is the wiper terminal and is equivalent to the movable
terminal of a mechanical potentiometer. The position of the
wiper within the array is determined by the WRi register.
SHDN
The SHDN pin forces the resistors to end-to-end open circuit
condition and shorts all RWs to GND. When SHDN is
returned to logic high, the previous latch settings put RWi at
the same resistance setting prior to shutdown. This pin is
logically ANDed with the SHDN bit in the ACR register. SPI
interface is still available in shutdown mode and all registers
are accessible. This pin must remain HIGH for normal
operation.
FIGURE 7. END TO END R
-0.5
-1.0
1.0
0.5
0.0
-40
FIGURE 9. MIDSCALE GLITCH, CODE 80h TO 7Fh
V
CC
SIGNAL AT WIPER
(WIPER UNLOADED)
= 5.5V
-20
TEMPERATURE
0
TEMPERATURE (ºC)
20
V
CC
10k
TOTAL
= 2.7V
8
40
% CHANGE vs
60
50k
(Continued)
80
100
120
ISL22449
Bus Interface Pins
SERIAL CLOCK (SCK)
This is the serial clock input of the SPI serial interface.
SERIAL DATA OUTPUT (SDO)
The SDO is an open drain serial data output pin. During a
read cycle, the data bits are shifted out at the falling edge of
the serial clock SCK, while the CS input is low.
SDO requires an external pull-up resistor for proper operation.
105
90
75
60
45
30
15
FIGURE 11. DCP CONNECTION IN SHUTDOWN MODE
0
FIGURE 8. TC FOR VOLTAGE DIVIDER MODE IN ppm
16
FIGURE 10. LARGE SIGNAL SETTLING TIME
50k
36
SCL
TAP POSITION (DECIMAL)
10k
SIGNAL AT WIPER
(WIPER UNLOADED MOVEMENT
FROM 7Fh TO 00h)
56
RW
76
96
July 17, 2009
FN6333.3