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MAX1669 データシート(PDF) 4 Page - Maxim Integrated Products |
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MAX1669 データシート(HTML) 4 Page - Maxim Integrated Products |
4 / 20 page Note 1: Guaranteed but not 100% tested. Note 2: TR is the junction temperature of the remote diode. The temperature error specification is optimized to and guaranteed for a diode-connected 2N3906 transistor with ideality factor = 1.013. Variations in the ideality factor “m” of the actual transistor used will increase the temperature error by *. See the Temperature Error vs. Remote Diode Temperature graph in the Typical Operating Characteristics for typical temperature errors using several random 2N3906s. See Remote Diode Selection for remote diode forward-voltage requirements. Note 3: The SMBus logic block is a static design that works with clock frequencies down to DC. While slow operation is possible, it violates the 10kHz minimum clock frequency and SMBus specifications, and may monopolize the bus. Note 4: Note that a transition must internally provide at least a hold time in order to bridge the undefined region (300ns max) of SMBCLK’s falling edge. Note 5: Specifications to -40°C are guaranteed by design and not production tested. Fan Controller and Remote Temperature Sensor with SMBus Serial Interface 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (VCC = +3.3V, TA = -40°C to +85°C, unless otherwise noted.) (Note 5) Pin forced to 0.4V ADD_, I/O1, I/O2, SYNC, SMBCLK, SMBDATA; VCC = 3V to 5.5V ADD_, I/O1, I/O2, SYNC, SMBCLK, SMBDATA; VCC = 3V to 5.5V Logic inputs forced to VCC or GND Pin forced to 5.5V µA -1 1 Logic Input Current µA 1 ALERT, OVERT, I/O1, I/O2 Output High Leakage Current V 0.2 FAN Output Voltage Low mA 6 SMBDATA, ALERT, OVERT, I/O1, I/O2 Output Low Sink Current V 0.8 Logic Input Low Voltage V 2.1 Logic Input High Voltage DAC mode, FAN duty factor = 1111b, IOUT = 5mA DAC mode, any setting, RL = 10k Ω to GND PWM mode, any setting PWM mode, VFAN forced to 0.4V PWM mode, VFAN forced to 2.9V Monotonicity guaranteed Autoconvert mode From stop bit to conversion complete TR = -55°C to +125°C, diode ideality factor = 1.013 Autoconvert mode, average measured over 1sec, FAN output set to 150Hz mode CONDITIONS V 2.94 FAN Output Voltage High %FS -5 5 FAN Total Unadjusted Error % -25 +25 FAN PWM Frequency Error mA -10 FAN Output Sink Current mA 10 FAN Output Source Current Hz 1.6 2.4 Conversion Rate ms 47 Conversion Time µA 100 Average Operating Supply Current Bits 8 Temperature Resolution (Note 1) °C -5 5 Temperature Error, Remote Diode (Note 2) UNITS MIN MAX PARAMETER DAC mode, FAN duty factor = 0000b, IOUT = -5mA V 3 5.5 Supply Voltage Range ADC AND POWER SUPPLY FAN OUTPUT SMBus INTERFACE * . . ∆T m kT C R =− + () °() 1 013 1 273 15 |
同様の部品番号 - MAX1669 |
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同様の説明 - MAX1669 |
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