전자부품 데이터시트 검색엔진 |
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DS3903 데이터시트(PDF) 4 Page - Maxim Integrated Products |
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DS3903 데이터시트(HTML) 4 Page - Maxim Integrated Products |
4 / 11 page Triple 128-Position Nonvolatile Digital Potentiometer 4 ______________________________________________________________________ Note 1: All voltages are referenced to ground. Note 2: ISTBY specified for VCC equal to 3.0V and 5.0V while control port logic pins are driven to the appropriate logic levels. Appropriate logic levels specify that logic inputs are within a 0.5V of ground or VCC for the corresponding inactive state. WP must be disconnected or connected high. Note 3: I/O pins of fast mode devices must not obstruct the SDA and SCL lines if VCC is switched off. Note 4: A fast mode device can be used in a standard mode system, but the requirement tSU:DAT > 250ns must then be met. This is automatically the case if the device does not stretch the low period of the SCL signal. If such a device does stretch the low period of the SCL signal, it must output the next data bit to the SDA line tRMAX + tSU:DAT = 1000ns + 250ns = 1250ns before the SCL line is released. Note 5: After this period, the first clock pulse is generated. Note 6: The maximum tHD:DAT has only to be met if the device does not stretch the low period (tLOW) of the SCL signal. Note 7: A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the VIN MIN of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. Note 8: CB—total capacitance of one bus line in picofarads, timing referenced to 0.9 x VCC and 0.1 x VCC. Note 9: EEPROM write begins after a stop condition occurs. Note 10: Absolute linearity is used to measure expected wiper voltage as determined by wiper position in a voltage-divider configuration. Note 11: Relative linearity is used to determine the change of wiper voltage between two adjacent wiper positions in a voltage-divider configuration. Typical Operating Characteristics (VCC = 5.0V, 10k Ω plots apply to both pot0 and pot2, TA = +25°C unless otherwise noted.) 10 20 30 40 50 60 70 80 90 100 0 W-L RESISTANCE vs. WIPER SETTING (90k Ω) WIPER SETTING 125 100 75 50 25 0 W-L RESISTANCE vs. WIPER SETTING (10k Ω) WIPER SETTING 125 100 75 50 25 0 2 4 6 8 10 0 STANDBY SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE ( °C) 50 40 -30 -20 -10 10 20 030 20 40 60 80 100 120 140 160 0 -40 60 70 80 VCC = 5V VCC = 3V |
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