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ISL22349 bảng dữ liệu(PDF) 8 Page - Intersil Corporation |
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ISL22349 bảng dữ liệu(HTML) 8 Page - Intersil Corporation |
8 / 13 page 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 |
Số phần tương tự - ISL22349_09 |
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Mô tả tương tự - ISL22349_09 |
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