Features

Power supply current 0.5 mA (typical value) 23

Sensor path bus

conversion time 14 to 1456 milliseconds

temperature range # 8722; 20 to+125 ° C

Power voltage+3.0 to +3.6 v

— 4 hardware programming address description

Temperature sensing LM95010 is a number Output temperature sensor

– 0.25 ° C resolution, single -line interface compatibility

–127.75 ° C maximum temperature reading sensor path interface. It uses ΔVBE simulation

to generate the temperature sensing technology of 8 -drawing VSSOP packaging

The proportional difference voltage to the temperature.

This voltage is digitalized using a Sigma-Delta simulation-digital converter. LM95010 is part of the device hardware monitoring system based on microprocessors, consisting of two parts:

PC system health controller (main control), such as - (motherboard, base station, router, super I/O,) It is LM95010S. Using the sensor path, the LM95010 controls the power supply by the captain and reports to the captain to report its own mold temperature. The sensor path data is encoded by the pulse key specification width, which allows LM95010 to easily connect to multiple general micro-temperature sensor accuracy ± 2 ° C (maximum) controller.

(1) Unless otherwise explained, all voltages are measured relative to GND.

(2) Absolute maximum rated value indicates the limit that may cause damage. The work rated value indicates that the equipment function is normal, but does not guarantee the performance limit. For ensuring specifications and test conditions, please refer to electrical characteristics. Ensuring the specifications are only applicable to the test conditions listed. Some performance characteristics may be reduced when the device is not running under the test conditions.

(3) When the input voltage (VIN) of any pin exceeds the power supply (VIN LT; GND or VIN GT; V+), the current of the pins should be limited to 5 millions. The parasitic elements and/or ESD protection circuits of the LM95010 pin are shown below. The nominal breakdown voltage D3 is 6.5V. SNP represents a callback device. The device connected to a specific tube foot is marked with "" #10003;"" in Table 1.

(4) When the 2 ounce foil is connected to the printing circuit board, the connection with the environment of the environment is 210 ° C/W.

(5) Human model, 100 PF passes through 1.5 kΩ resistance. Machine model, 200 PF discharge directly to each pin. Did you see it? Figure 3 is ESD guaranteeProtect the input structure.

DC Power Feature

The technical specifications below are applicable to V+u003d 3.0 VDC to 3.6 VDC, unless there are other regulations in the conditions. The thickness limit is suitable for TA u003d TJ u003d TMIN to TMAX; all other limit TA u003d+25 ° C.

(1) ""Typical values"" When TA u003d 25 ° C, it represents the most likely parameter specification. They will be used as general reference values, not key reference value design calculations.

(2) restrictions on TI's AOQL (average shipment quality level).

(3) The power current will not increase significantly with the sensor path transaction.

(4) Temperature accuracy does not include the effect of self -heating. The temperature caused by heating is the internal power consumption and thermal resistance of LM95010. See the annotation 4 in the absolute maximum rated table for the resistance of self -heating calculations.

AC electrical characteristics

The following specifications are applicable to V+u003d+3.0VDC to+3.6VDC, unless there are other regulations. The thickness limit is suitable for TA u003d TJ u003d TMIN to TMAX; all other restrictions of TA u003d TJ u003d 25 ° C. Sensor path characteristics meet the sensor path specification. For details, see this specification.

(1) ""Typical values"" When TA u003d 25 ° C, it represents the most likely parameter specification. They will be used as general reference values, not key reference value design calculations.

(2) restrictions on TI's AOQL (average shipment quality level).

(3) This specification is only used to indicate the update frequency of temperature data after enabled.

(4) The output decrease time was measured from VIH min to Vil Max, and the output drop time was guaranteed by the design.

(5) The output rising time is measured from VIL MAX to VIH min, and the output rising time is guaranteed by the design.

LM95010 is based on ΔVBE temperature sensing method. Differential voltage represents temperature, and uses the ∑-Δ modulus converter for digitization. Digital temperature data can be called the sensor path through a simple single -line interface. The sensor path is optimized for hardware monitoring. TI provides a tax -free license related to the intellectual property rights of sensor path bus. LM95010 has 2 address pins, allowing up to 4 LM95010 to connect to a sensor path bus. The physical interface of the SWD signal of this sensor path is the same as the familiar industry standard SMBUS SMBDAT. Digital information is encoded in the pulse width of the transmitted signal. Each point can be used as a microcontroller. For microcontrollers with larger functions, asynchronous attentionThe signal can be transmitted by the LM95010, interrupt the micro controller and notify its temperature data has been updated in the reader. In order to make the power consumption of LM95010 meet the system requirements, the LM95010 has a shutdown mode and it supports multiple conversion rates.

Sensor path bus SWD

SWD is a single -line data cable used for communication. SensorPath uses 3.3V single -end signaling upper resistance and drives low -voltage side driver (see Figure 7). For the purpose of time, the sensor path design is used for capacity load (CL) up to 400pf. Please note that in many cases, the 3.3V spare rail of the PC will be used as a power supply and host power. SWD and low voltage logic compatibility. The host can provide an internal pull -up resistor. In this case, no external resistor is required. The minimum value of this pull -up resistor must be considered to maximize the allowable output load current 4MA.

Data bit 0 data bit 1 starting bit

reset

All ""bit signals ""They all involved driving the bus to a low level. The duration of low levels is different from different ""bit signals"". Each ""bit signal"" has a fixed pulse width. The sensor path supports bus reset operation and clock training sequence, allowing the internal clock rate from the device to synchronize its internal clock rate with the main device. Because the LM95010 meets the time requirements of ± 15%of the sensor path, the LM95010 does not require a clock training sequence and supports this function. This section defines the ""bit signal"" behavior in all modes. When performing this operation, please refer to the section section of the timing chart in the electrical characteristics (Figure 4 and Figure 5). Please note that the timing diagram of different types of ""bit signals"" shows the time relationship between them better. However, different types of ""bit signals"" appear at different SWDs. These timing charts show that the signal of the main control and the LM95010 from the machine driver is like the signal seen when detecting SWD. The signal label began to start with the label mout_u. The signal label starting with label SLV_U describes the drive of the LM95010. What other signals are displayed when detecting specific functions of SWD (for example, ""Main WR 0"" is the value of the main device bit of the transmission data). The bus is not activated when the SWD signal is up to at least a period of time, and the bus is in a non -active state. The bus is in a non -active ""bit signal"" between each node.

Data bit 0 and 1

All data bit signal transmission is started by the host. Data bit 0 is represented by ""short"" pulse; data bit 1 is represented by long pulse. The direction of the bit is opposite to the host, as shown below:

Data writing-data bit transmitted from the host to LM95010.

Data reading-transmitted from LM95010To the data bit of the host.

Before starting a data bit (reading or writing), the host must monitor whether the bus is in a non -active state. The host starts the data writing or TMTR1 by the driver's bus activation (low level) within the time period of the data value (TMTR0), which indicates that ""0"" or ""1"") respectively. LM95010 will detect the cycle of SWD in the TSFedet and will begin to measure the duration of SWD activation in order to detect the data value. The host starts data reading by driving bus for a period of time. The LM95010 will detect that SWD becomes active for a period of time. For the data of ""0"