LM95233_07 NSC [National Semiconductor], LM95233_07 Datasheet
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LM95233_07
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LM95233_07 Summary of contents
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LM95233 Dual Remote Diode and Local Temperature Sensor with SMBus Interface and TruTherm™ Technology General 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 ...
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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 2) Package Input Current (Note 2) SMBDAT, TCRIT1, TCRIT2, TCRIT3 Output Sink Current Storage ...
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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 V ; all other limits =+25°C, unless otherwise noted. T MAX A ...
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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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Temperature Digital Output Binary −25°C 1110 0111 0000 0000 −55°C 1100 1001 0000 0000 13-bit, Unsigned Binary Temperature Digital Output Binary +255.875°C 1111 1111 1110 0000 +255°C 1111 1111 0000 0000 +201°C 1100 1001 0000 0000 +125°C 0111 1101 0000 ...
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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 shows the local temperature interaction with the Tcrit limit and hysteresis val- ue. As can be seen in the diagram when the local temperature ...
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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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SMBCLK or SMBDAT lines must be held low for at least 35ms. 2. When SMBDAT is HIGH, have the master initiate an SMBus start. The LM95233 will respond properly to ...
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Register Name Command 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 TCRIT3 Mask Local Tcrit Limit Remote 1 Tcrit-1 ...
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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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Remote 1-2 Offset Register Name Remote 1 Offset Remote 2 Offset Bit(s) Bit Name 7 SIGN 1/2 2.3 CONFIGURATION REGISTERS 2.3.1 Main Configuration Register Register Name ...
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Bit(s) Bit Name Read/ Write – 7-2 RO 1-0 CR[1:0] R/W 2.3.3 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 ...
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Bit(s) Bit Name 1–0 R1F[1:0] 2.3.5 1-Shot 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 7 BUSY 6 NR – 5–4 3 SR4F 2 SR3F ...
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Register Name Status 1 (Diode Fault) Bit(s) Bit Name Read/ Write – 7 R2DO RO 2 R2DS RO 1 R1DO RO 0 R1DS RO 2.4.3 Status 2 (TCRIT1) Status bits for TCRIT1. When one or more of these ...
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Register Name Status 3 (TCRIT2) Bit(s) Bit Name Read/ Write 7– R2T2 RO 1 R1T2 RO 0 LT2 RO 2.4.5 Status 4 (TCRIT3) Status bits for TCRIT3. When one or more of these bits are set and ...
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Diode Model Status Register Name Diode Model Status (TruTherm on and 3904 connected) Bit(s) Bit Name Read/ Write – 7 R2TD RO 1 R1TD RO – 2.5 MASK REGISTERS 2.5.1 TCRIT1 Mask Register The mask ...
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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 events propagate to the TCRIT3 pin. Register Name ...
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Bit(s) Bit Name Read/ Write R/W 2.6.2 Remote Limit Registers The range for these registers is 0°C to 255°C. Register Name Remote 1 Tcrit-1 Limit (used by TCRIT1 error events) Remote 2 ...
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Bit(s) Bit Name 2.7 IDENTIFICATION REGISTERS Register Name Manufacturer ID Revision ID www.national.com Read/ Description Write R/W bit weight 16°C R/W bit weight 8°C R/W bit weight 4°C R/W bit ...
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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 Equation 5 only applies to this topology. 3.1.2 Calculating Total System Accuracy The voltage seen ...
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Pentium M 1.00151 1.00220 1.00289 (Centrino) MMBT3904 1.003 AMD Athlon MP 1.002 1.008 model 6 AMD Athlon 64 1.008 1.008 AMD Opteron 1.008 1.008 AMD Sempron 1.00261 3.1.3 Compensating for Different Non-Ideality In order to compensate for the errors introduced ...
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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 inches (millimeters) unless otherwise noted 14-Lead Molded Leadless Leadframe Package (LLP), Order Number LM95233CISD or LM95233CISDX NS Package Number SDA14B 35 www.national.com ...
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