Overview
The PCT2075D,118 from NXP USA Inc. is a high-accuracy digital temperature sensor and thermal watchdog. It features a temperature-to-digital converter with ±1 °C accuracy over a range of -25 °C to +100 °C, using an on-chip band gap temperature sensor and Sigma-Delta A-to-D conversion technique. This device is designed as a drop-in replacement for other LM75 series thermal sensors and is particularly useful in applications requiring precise temperature measurement and control.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Range | -55 °C to +125 °C |
| Accuracy | ±1 °C (-25 °C to +100 °C) |
| Resolution | 11-bit, 0.125 °C |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Current | 125 µA (nominal) |
| Interface | 2-Wire, I2C, Serial |
| Output Type | Digital, I2C |
| Package | SO8, HWSON-8 |
| Thermal Watchdog | Programmable overtemperature shutdown and hysteresis limits |
Key Features
- I2C-bus Interface: Supports Fast-mode Plus for easy communication with microcontrollers and other devices.
- High Accuracy: Provides ±1 °C accuracy over the specified temperature range.
- Digital Output: Offers a digital output that can be easily read by microcontrollers and other devices.
- Thermal Watchdog: Includes programmable overtemperature shutdown and hysteresis limits to prevent overheating or overcooling.
- Low Power Consumption: Operates with a nominal supply current of 125 µA.
- RoHS Compliant: Designed to meet Restriction of Hazardous Substances standards.
- Multiple Device Support: Allows up to 27 devices on the same bus without address conflict.
- Pin-for-Pin Replacement: Compatible with LM75 series thermal sensors.
Applications
The PCT2075D,118 is suitable for various applications that require precise temperature measurement and control, such as:
- Industrial automation and control systems.
- Consumer electronics requiring thermal monitoring.
- Aerospace and automotive systems where temperature precision is critical.
- Medical devices and equipment that need accurate temperature sensing.
- Server and data center thermal management.
Q & A
- What is the temperature accuracy of the PCT2075D,118?
The PCT2075D,118 has a temperature accuracy of ±1 °C over the range of -25 °C to +100 °C.
- What is the resolution of the temperature sensor?
The temperature sensor has a resolution of 11-bit, which translates to 0.125 °C.
- What is the operating voltage range of the PCT2075D,118?
The device operates within a supply voltage range of 2.7 V to 5.5 V.
- What type of interface does the PCT2075D,118 use?
The device uses a 2-Wire, I2C serial interface.
- Can multiple PCT2075D,118 devices be connected on the same bus?
Yes, up to 27 devices can be connected on the same bus without address conflict due to the three selectable logic address pins).
- What is the purpose of the thermal watchdog feature?
The thermal watchdog feature includes programmable overtemperature shutdown and hysteresis limits to prevent overheating or overcooling of the device).
- Is the PCT2075D,118 RoHS compliant?
Yes, the PCT2075D,118 is designed to meet Restriction of Hazardous Substances (RoHS) standards).
- What is the maximum operating temperature of the PCT2075D,118?
The maximum operating temperature is +125 °C).
- Can the device be set to different operation modes?
Yes, the device can be set in normal mode or shutdown mode to minimize power consumption).
- How does the device handle continuous access without interrupting the conversion process?
The I2C-bus section is independent of the Sigma-Delta converter section, allowing continuous access without interrupting the conversion process).
