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ISL22349UFV14Z 数据表(PDF) 8 Page - Intersil Corporation

部件名 ISL22349UFV14Z
功能描述  Quad Digitally Controlled Potentiometers
Download  13 Pages
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制造商  INTERSIL [Intersil Corporation]
网页  http://www.intersil.com/cda/home
标志 INTERSIL - Intersil Corporation

ISL22349UFV14Z 数据表(HTML) 8 Page - Intersil Corporation

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8
FN6331.3
May 28, 2009
Pin Descriptions
Potentiometers Pins
RWI (I = 0, 1, 2 OR 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 resistor to end-to-end open circuit
condition and shorts all RWi 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 AND with SHDN bit in ACR register. I2C interface is
still available in shutdown mode and all registers are
accessible. This pin must remain HIGH for normal operation.
Bus Interface Pins
SERIAL DATA INPUT/OUTPUT (SDA)
The SDA is a bidirectional serial data input/output pin for I2C
interface. It receives device address, operation code, wiper
address and data from an I2C external master device at the
rising edge of the serial clock SCL, and it shifts out data after
each falling edge of the serial clock.
SDA requires an external pull-up resistor, since it is an open
drain input/output.
FIGURE 7. END-TO-END RTOTAL % CHANGE vs
TEMPERATURE
FIGURE 8. TC FOR VOLTAGE DIVIDER MODE IN ppm
FIGURE 9. MIDSCALE GLITCH, CODE 3Fh TO 40h
FIGURE 10. LARGE SIGNAL SETTLING TIME
Typical Performance Curves (Continued)
-1.0
-0.5
0.0
0.5
1.0
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
VCC = 2.7V
50k
10k
VCC = 5.5V
0
15
30
45
60
75
90
105
16
36
56
76
96
TAP POSITION (DECIMAL)
10
50
SIGNAL AT WIPER
(WIPER UNLOADED)
SIGNAL AT WIPER
(WIPER UNLOADED) MOVEMENT
FROM 7Fh TO 00h
SCL
FIGURE 11. DCP CONNECTION IN SHUTDOWN MODE
RW
ISL22349


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