參數(shù)資料
型號: ISL22449
廠商: Intersil Corporation
英文描述: Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only(低噪聲,低功率,SPI總線, 128抽頭電位器)
中文描述: 低噪聲,低功耗,SPI總線,128抽頭,雨刷,只有(低噪聲,低功率和SPI總線,128抽頭電位器)
文件頁數(shù): 8/12頁
文件大小: 356K
代理商: ISL22449
8
FN6333.2
September 15, 2006
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 OR’d with SHDN bit in ACR register. SPI interface is
still available in shutdown mode and all registers are
accessible. This pin must remain HIGH for normal operation.
FIGURE 11. DCP CONNECTION IN SHUTDOWN MODE
Bus Interface Pins
Serial Clock (SCK)
This is the serial clock input of the SPI serial interface.
FIGURE 7. END TO END R
TOTAL
% CHANGE vs
TEMPERATURE
FIGURE 8. TC FOR VOLTAGE DIVIDER MODE IN ppm
FIGURE 9. MIDSCALE GLITCH, CODE 80h TO 7Fh
FIGURE 10. LARGE SIGNAL SETTLING TIME
Typical Performance Curves
(Continued)
-1.00
-0.50
0.00
0.50
1.00
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (oC)
10k
50k
Vcc = 5.5V
Vcc = 2.7V
E
T
0
15
30
45
60
75
90
105
16
36
56
76
96
TAP POSITION (DECIMAL)
10k
50k
T
RW
ISL22449
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