ISL22349WFV14Z(2006) 데이터 시트보기 (PDF) - Intersil

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ISL22349WFV14Z
(Rev.:2006)

Quad Digitally Controlled Potentiometers (XDCP™)

Intersil 

ISL22349

Typical Performance Curves (Continued)

1.00

Vcc = 2.7V

50k

0.50

0.00

-0.50

Vcc = 5.5V

10k

-1.00

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (ºC)

105

90 10k

75

60

45

30

50k

15

0

16

36

56

76

96

TAP POSITION (DECIM AL)

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

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 OR’d 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.

FIGURE 10. LARGE SIGNAL SETTLING TIME

RW

FIGURE 11. DCP CONNECTION IN SHUTDOWN MODE

8

FN6331.2

September 15, 2006

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