- Remote and local temperature channels
- TruTherm BJT tests compensation techniques
- LM95235Q is an AEC-Q100 grade 3 standard that is manufactured in an automotive grade process
- Diode Model Selection Bit - MMBT3904 or 65/90 nm processor diode
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Two formats: -128°C to 127.875°C and 0 °C to 255.875 °C
- Remote channel of the digital filter
- Programmable TCRIT and OS thresholds
- Programmable shared lag registration
- Diode fault detection
- Mask, offset and status registers
- SMBus 2.0 compatible interface with TIMEOUT support
- Optimal power programmable slew rate
- Three levels of address pins
- Standby mode one-time conversion control
- Pin-to-pin compatible LM86/LM89
- 8-pin MSOP package
illustrate
The LM95235 chip is an 11-bit, 2-wire System Management Bus (SMBus) interface and TruTherm technology that monitors the temperature of a remote diode as well as its own digital temperature sensor. The LM95235 chip can be used to very accurately monitor the temperature of an external device such as a microprocessor, graphics processor, or diode-connected transistor MMBT3904. For automotive applications, LM95235Q is available as an AEC-Q100 standard, which is Grade3 in an automotive grade manufacturing process. TruTherm BJT (transistor) β compensation technology enables the LM95235 chip to accurately monitor the discovery of thermal diodes in 90nm and smaller process sizes. The LM95235 chip reports two 127.875 different formats in the range of temperature °C/-128°C and in the range of 0°C/255°C. The LM95235 chip and ^^T_CRIT OS output assertion or shielding channels exceed their set limits and can be used to shut down the system, turn on the system fans, or act as interrupt functions for microcontrollers. The current state of the ^^T_CRIT and OS pins can be read back from the status registers via the SMBus interface. All limits have a common programmable hysteresis register.
The remote temperature channels of the LM95235 chip have programmable digital filters. The LM95235 chip contains a diode model selection bit to select a typical Intel ® processor in the 65nm or 90nm process or MMBT3904, as well as as an offset register for maximum flexibility and best accuracy.
While the LM95235 chip has three levels of address pins connected to 3 devices to the same SMBus master, it is shared with ^OS outputs. The LM95235 chip has programmable slew rate registers and standby mode to save power. You can trigger a transition in standby by writing a one-time registration.
Main specifications
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■ Supply voltage
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3.0 V to 3.6 V
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| ■ Supply current, exchanged. Rate = 1 Hz
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350μA (typical)
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| ■ Remote diode temperature accuracy
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| TA = 25 °C to 85 °C, TD= 60 °C to 100 °C
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± 0.75°C (max.)
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| TA = 25 °C to 85 °C, TD= 40°C to 125°C
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± 1.5 °C (max.)
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| ■ Local temperature accuracy
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| TA = 25°C to 100°C
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± 2.0 °C (max.)
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| ■ Conversion rate, dual channel
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16 to 0.4 Hz
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apply
- Processor/computer system thermal management
- (e.g. laptops, desktops, workstations, servers)
- Electronic test equipment and office electronics
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