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ISL22313 Fiches technique(PDF) 10 Page - Intersil Corporation |
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ISL22313 Fiches technique(HTML) 10 Page - Intersil Corporation |
10 / 15 page 10 FN6421.0 July 17, 2007 Pin Description Potentiometers Pins RH and RL The high (RH) and low (RL) terminals of the ISL22313 are equivalent to the fixed terminals of a mechanical potentiometer. RH and RL are referenced to the relative position of the wiper and not the voltage potential on the terminals. With WR set to 255 decimal, the wiper will be closest to RH, and with the WR set to 0, the wiper is closest to RL. RW RW is the wiper terminal, and it is equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the WR register. 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. Serial Clock (SCL) This input is the serial clock of the I2C serial interface. SCL requires an external pull-up resistor, since it is an open drain input. FIGURE 11. TC FOR RHEOSTAT MODE IN ppm FIGURE 12. FREQUENCY RESPONSE (1MHz) FIGURE 13. MIDSCALE GLITCH, CODE 7Fh TO 80h FIGURE 14. LARGE SIGNAL SETTLING TIME Typical Performance Curves (Continued) 0 100 200 300 400 500 16 66 116 166 216 TAP POSITION (DECIMAL) 50k 10k OUTPUT INPUT WIPER AT MID POINT (POSITION 80h) RTOTAL = 10kΩ SCL WIPER CS WIPER UNLOADED, MOVEMENT FROM 0h to FFh ISL22313 |
Numéro de pièce similaire - ISL22313 |
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Description similaire - ISL22313 |
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