lm75b-5.0-mdc National Semiconductor Corporation, lm75b-5.0-mdc Datasheet - Page 6

• Manufacturer Part Number: lm75b-5.0-mdc
• Description: Digital Temperature Sensor And Thermal Watchdog With Two-wire Interface
• Manufacturer: National Semiconductor Corporation

Note 8: The conversion-time specification is provided to indicate how often the temperature data is updated. The LM75 can be accessed at any time and reading
the Temperature Register will yield result from the last temperature conversion. When the LM75 is accessed, the conversion that is in process will be interrupted and
it will be restarted after the end of the communication. Accessing the LM75 continuously without waiting at least one conversion time between communications will
prevent the device from updating the Temperature Register with a new temperature conversion result. Consequently, the LM75 should not be accessed continuously
with a wait time of less than 300 ms.
Note 9: For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy with internal heating. This can cause an error of 0.64˚C at full
rated sink current and saturation voltage based on junction-to-ambient thermal resistance.
Note 10: O.S. Delay is user programmable up to 6 “over limit” conversions before O.S. is set to minimize false tripping in noisy environments.
Note 11: Default values set at power up.
Note 12: Typicals are at T
= 25˚C and represent most likely parametric norm.
A
Note 13: Holding the SDA line low for a time greater than t
will cause the LM75B to reset SDA to the IDLE state of the serial bus communication (SDA set
TIMEOUT
High).
01265805
FIGURE 2. Temperature-to-Digital Transfer Function (Non-linear scale for clarity)
01265806
FIGURE 3. Printed Circuit Board Used for Thermal Resistance Specifications
www.national.com
6