LM95233EB/NOPB National Semiconductor, LM95233EB/NOPB Datasheet
LM95233EB/NOPB
Specifications of LM95233EB/NOPB
Related parts for LM95233EB/NOPB
LM95233EB/NOPB Summary of contents
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... TruTherm BJT beta compensation technology accurately senses sub-micron process thermal diodes Connection Diagram TruTherm ™ trademark of National Semiconductor Corporation. Intel ™ trademark of Intel Corporation. Pentium ™ trademark of Intel Corporation. © 2011 National Semiconductor Corporation LM95233 ■ ...
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Ordering Information Part Number LM95233CISD LM95233CISDX Simplified Block Diagram Pin Descriptions Label Pin # D− 5 www.national.com Package NS Package Marking Number 95233CI SDA14B (LLP-14) 95233CI SDA14B (LLP-14) Function No Connect ...
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Label Pin # D2+ 6 Diode Current Source D1+ 7 Diode Current Source GND 8 Power Supply Ground A0 9 Dgital Input TCRIT1 10 Digital Output, Open-Drain TCRIT2 11 Digital Output, Open-Drain SMBDAT 12 SMBus Bi-Directional Data Line, Open-Drain Output ...
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Typical Application www.national.com 4 20206303 ...
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Absolute Maximum Ratings Supply Voltage Voltage at SMBDAT, SMBCLK, TCRIT1, TCRIT2, TCRIT3 Voltage at Other Pins D− Input Current Input Current at All Other Pins (Note Package Input Current (Note 2) SMBDAT, TCRIT1, TCRIT2, TCRIT3 Output Sink Current Storage Temperature ...
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Parameter Power-On Reset Threshold TCRIT1 Pin Temperature Threshold TCRIT2 Pin Temperature Threshold Logic Electrical Characteristics DIGITAL DC CHARACTERISTICS Unless otherwise noted, these specifications apply for all other limits =+25°C, unless otherwise noted ...
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SMBus DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for V Boldface limits apply for The switching characteristics of the LM95233 fully meet or exceed the published specifications of the SMBus version ...
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Pin # Label D2+ 7 D1+ 8 GND TCRIT1 11 TCRIT2 12 SMBDAT 13 SMBCLK 14 TCRIT2 Note 3: Reflow temperature profiles are different for ...
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Typical Performance Characteristics Conversion Rate Effect on Average Power Supply Current Remote Temperature Reading Sensitivity to Thermal Diode Filter Capacitance, TruTherm Disabled Intel Processor Process Process Thermal Diode Performance Comparison Thermal Diode Capacitor or ...
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Functional Description LM95233 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface that can monitor the temperature of two remote diodes as well as its own tem- perature. The LM95233 can be used to ...
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FIGURE 1. Conversion Rate Effect on Power Supply Current 1.2 POWER-ON-DEFAULT STATES LM95233 always powers up to these known default states. The LM95233 remains in these states until after the first con- version. 1. All Temperature readings set to 0°C ...
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Seventeen and fifty degree step response FIGURE 3. Digital Filter Response in a typical Intel processor process. The filter curves were purposely offset for clarity. Figure 3 shows the filter in ...
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Complement (12-bit plus sign) Temperature Digital Output Binary +125°C 0111 1101 0000 0000 +25°C 0001 1001 0000 0000 +1°C 0000 0001 0000 0000 +0.03125°C 0000 0000 0000 1000 0°C 0000 0000 0000 0000 −0.03125°C 1111 1111 1111 1000 ...
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FIGURE 4. Temperature Comparison Logic and Status Register Simplified Diagram www.national.com 14 20206350 ...
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TCRIT1 Mask Register, Status Register 1 and 2, and TCRIT1 output logic diagram. b) TCRIT2 Mask Register, Status Register 1 and 3, and TCRIT2 output logic diagram. c) TCRIT3 Mask Register, Status Register 1 and 4, and 20206351 TCRIT3 ...
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FIGURE 6. TCRIT response diagram (masking options not included) The TCRIT response diagram of Figure 6 temperature interaction with the Tcrit limit and hysteresis val- ue. As can be seen in the diagram when the local temperature exceeds the Tcrit ...
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Serial Bus Write to the internal Command Register followed by a the Data Byte (b) Serial Bus Write to the Internal Command Register (c) Serial Bus Read from a Register with the Internal Command Register preset to desired value. ...
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SERIAL INTERFACE RESET In the event that the SMBus Master is RESET while the LM95233 is transmitting on the SMBDAT line, the LM95233 must be returned to a known state in the communication pro- tocol. This may be done ...
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Register Name Command Configuration Conversion Rate Channel Conversion Enable Filter Setting 1-shot Common Status Register Status 1 (Diode Fault) Status 2 (TCRIT1) Status 3 (TCRIT2) Status 4 (TCRIT3) Diode Model Status (TruTherm on and 3904 connected) TCRIT1 Mask TCRIT2 Mask ...
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Bit(s) Bit Name 7 1/2 6 1/4 5 1/8 4-0 0 2.1.2 Remote Temperature Value Registers with Signed Format Register Name Remote Temp 1 MSB – Signed Remote Temp 1 LSB – Signed, Digital Filter Off Remote Temp 1 LSB ...
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Remote Temperature Value Registers with Unsigned Format Register Name Remote Temp 1 MSB – Unsigned Remote Temp 1 LSB – Unsigned, Digital Filter Off Remote Temp 1 LSB – Unsigned, Digital Filter On Remote Temp 2 MSB – Unsigned ...
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DIODE CONFIGURATION REGISTERS 2.2.1 Diode Model Select Register Name Diode Model Select Bit(s) Bit Name 7 R2TE 1 R1TE 0 0 2.2.2 Remote 1-2 Offset Register Name Remote 1 Offset Remote 2 Offset Bit(s) Bit Name 7 ...
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CONFIGURATION REGISTERS 2.3.1 Main Configuration Register Register Name Configuration Bit(s) Bit Name Read/ Write – STBY R/W – 5–0 RO 2.3.2 Conversion Rate Register Register Name Conversion Rate Bit(s) Bit Name Read/ Write – 7-2 RO ...
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Channel Conversion Enable When a conversion is disabled for a particular channel it is skipped. The continuous conversion rate is effected all other conversion rates are not effected as extra standby time is inserted in order to compensate. See ...
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Register Name 1-Shot Bit(s) Bit Name 7–0 - 2.4 STATUS REGISTERS 2.4.1 Common Status Register Register Name Common Status Register Bit(s) Bit Name Read/ Write 7 BUSY – 5– SR4F RO 2 ...
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Status 1 Register (Diode Fault) Status fault bits for open or shorted diode (i.e. Short Fault: D+ shorted to Ground or D-; Open Fault: D+ shorted to V During fault conditions the temperature reading is 0 °C if unsigned ...
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Status 3 (TCRIT2) Status bits for TCRIT2. When one or more of these bits are set and if not masked the TCRIT2 output will activate. TCRIT2 will deactivate when all these bits are cleared. Register Name Status 3 (TCRIT2) ...
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Diode Model Status Register Name Diode Model Status (TruTherm on and 3904 connected) Bit(s) Bit Name – 7-3 2 R2TD 1 R1TD – 0 2.5 MASK REGISTERS 2.5.1 TCRIT1 Mask Register The mask bits in this register allow control ...
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TCRIT2 Mask Registers Register Name TCRIT2 Mask Bit(s) Bit Name Read/ Write – 7 R2T2M R/W 1 R1T2M R/W 0 LTM R/W 2.5.3 TCRIT3 Mask Register The mask bits in this register allow control over which error ...
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LIMIT REGISTERS 2.6.1 Local Limit Register The Local Limit register range is 0°C to 127°C. The value programmed in this register is used to determine a local temperature error event. Register Name Local Tcrit Limit Bit(s) Bit Name 7 ...
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Limit assignments for each TCRIT output pin: Output Pin Remote 2 TCRIT1 Remote 2 Tcrit-1 Limit TCRIT2 Remote 2 Tcrit-2 Limit TCRIT3 Remote 2 Tcrit-2 Limit 2.6.3 Common Tcrit Hysteresis Register The hysteresis register range is 0°C to 32°C. The ...
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Applications Hints The LM95233 can be applied easily in the same way as other integrated-circuit temperature sensors, and its remote diode sensing capability allows used in new ways as well. It can be soldered to a ...
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TruTherm BJT beta compensation should only be enabled when measuring the temperature of a transistor integrated as shown in the processor of Figure 8, because applies to this topology. 3.1.2 Calculating Total System Accuracy The voltage seen by the LM95233 ...
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... Compensating for Different Non-Ideality In order to compensate for the errors introduced by non-ide- ality, the temperature sensor is calibrated for a particular processor. National Semiconductor temperature sensors are always calibrated to the typical non-ideality and series resis- tance of a given processor type. The LM95233 is calibrated ...
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SMBus maximum frequency of communication is rather low (100 kHz max), care still needs to be taken to ensure proper termination within a system with multiple parts on the bus and long printed circuit board traces lowpass ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 14-Lead Molded Leadless Leadframe Package (LLP), Order Number LM95233CISD or LM95233CISDX NS Package Number SDA14B 36 ...
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Notes 37 www.national.com ...
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