Product Overview
The LM75B is a digital temperature sensor with an integrated bandgap sensor and an 11-bit sigma-delta analog-to-digital converter (ADC). It offers overheating alert functionality and supports both normal operation and low-power shutdown modes. In normal operation, the chip periodically monitors ambient temperature. In shutdown mode, the chip powers down to minimize power consumption. Communication with the controller is established via a two-wire I2C serial bus interface. The device features multiple internal data registers, including a status register for chip settings (operating mode, OS mode, OS polarity, OS error queue), a temperature register for storing detected digital temperatures, and overheat detection and hysteresis registers for programmable thresholds. The I2C serial interface supports 3-bit logic address pins, allowing up to 8 devices on the same bus.
Product Attributes
- Brand: Msksemi
- Interface: I2C
- Package Types: MSOP8, SOIC-8
Technical Specifications
| Feature | Value | Unit | Notes |
| Operating Voltage | 2.8 to 5.5 | V | |
| Temperature Range | -55 to 125 | ||
| Temperature Accuracy | 2 | -25 to 100 | |
| Temperature Accuracy | 3 | -55 to 125 | |
| Temperature Resolution | 0.125 | 11-bit ADC | |
| Standby Current | < 1 | A | |
| Operating Frequency | 20 to 400 | KHz | Supports bus fault tolerance |
| Temperature Conversion Time (Normal Mode) | 10 | ms | |
| Temperature Conversion Period (Normal Mode) | 100 | ms | |
| Average Operating Current (Normal, I2C Standby) | 100 to 200 | uA | |
| Average Operating Current (Normal, I2C Active, FSCL=400kHz) | 300 | uA | |
| Shutdown Mode Current | 0.2 to 1 | uA | |
| Input High Level (SCL, SDA, A2-A0) | 0.7*VCC to VCC+0.3 | V | |
| Input Low Level (SCL, SDA, A2-A0) | -0.3 to 0.3*VCC | V | |
| Input Hysteresis Voltage (SCL, SDA) | 300 | mV | |
| Input Hysteresis Voltage (A2-A0) | 150 | mV | |
| High Level Input Current | -1 to 1 | A | VI=VCC |
| Low Level Input Current | -1 to 1 | A | VI=0V |
| Output Low Voltage (SDA, OS; IOL=3mA) | 0.4 | V | |
| Output Low Voltage (SDA, OS; IOL=4mA) | 0.8 | V | |
| Output Leakage Current (SDA, OS; VOH=VCC) | 10 | A | |
| Overheat Detection Error Count | 1 to 6 | Programmable | |
| Default Overheat Temperature (TTH(OTS)) | 80 | ||
| Default Hysteresis Temperature (THYS) | 75 | ||
| Input Capacitance (Digital Pins) | 20 | pF | |
| SCL Clock Frequency | 0.02 to 400 | kHz | |
| SCL High Level Width | 0.6 | us | |
| SCL Low Level Width | 1.3 | us | |
| START Hold Time (tHD;STA) | 100 | ns | |
| Data Setup Time (tSU;DAT) | 100 | ns | |
| Data Hold Time (tHD;DAT) | 0 | ns | |
| STOP Setup Time (tSU;STO) | 100 | ns | |
| SDA Fall Time | 250 | ns | CL=400pF; IOL=3mA |
| Timeout (tTO) | 75 to 200 | ms | SDA low duration |
Application Scenarios
- Temperature control systems
- Personal computers
- Electronic equipment
- Industrial control
2403071145_MSKSEMI-LM75BDP-MS_C18547812.pdf
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