DS1775R7+T&R

DS1775R7+T&R is a digital thermometer and thermostat that provides temperature readings that indicate the device’s temperature. Thermostat settings and temperature readings are all communicated to/from the DS1775 over a simple 2-wire serial interface. No additional components are required; the device is truly a “temperature-to-digital” converter. For applications that require greater temperature resolution, the user can adjust the readout resolution from 9 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be detected quickly. The open-drain thermal alarm output, O.S., becomes active when the temperature of the device exceeds a user-defined temperature TOS. The number of consecutive faults required to set O.S. active is configurable by the user. It is used in applications such as personal computers/servers/workstations, cell phones, office equipment, and any thermally sensitive system.

• Temperature measurements require no external components, 2-wire serial interface
• User-definable thermostat settings, 2.7V to 5.5V wide power-supply range
• Software compatible with DS75 2-wire thermal watchdog in thermometer mode
• I/O capacitance is 10pF maximum at (2.7V ≤ VDD ≤ 5.5V, TA = -55°C to +125°C)
• Standby current is 1µA maximum at (2.7V ≤ VDD ≤ 5.5V, TA = -55°C to +125°C)
• Thermometer error is ±0.5°C typical at (2.7V ≤ VDD ≤ 5.5V, TA = -55°C to +125°C)
• SCL clock frequency is 400KHz maximum at (2.7V ≤ VDD ≤ 5.5V, TA = -55°C to +125°C)
• Active current is 1000µA maximum at (active temp conversions, 2.7V ≤ VDD ≤ 5.5V)
• Operating temperature range from -55°C to +125°C
• 5-pin SOT23 package

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