Overview
The ADT75ARMZ-REEL7, produced by Analog Devices Inc., is a comprehensive temperature monitoring system integrated into a compact 8-lead MSOP or SOIC package. This device features a band gap temperature sensor and a 12-bit analog-to-digital converter (ADC), making it highly accurate and reliable for temperature measurements. The ADT75 is designed to operate over a wide temperature range of −55°C to +125°C and is powered by a supply voltage of 2.7 V to 5.5 V. It includes several key features such as a shutdown mode, programmable temperature limits, and an open-drain output for alerting when temperature thresholds are exceeded.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | - | 5.5 | V | - |
| Operating Temperature | −55 | - | +125 | °C | - |
| Supply Current (Normal Mode) | - | 200 | - | µA | VDD = 3.3 V |
| Shutdown Current | - | 3 | - | µA | - |
| ADC Resolution | - | 12 | - | Bits | - |
| Temperature Resolution | - | 0.0625 | - | °C | - |
| Temperature Conversion Time | - | 60 | - | ms | - |
| Update Rate | - | 100 | - | ms | Conversion started every 100 ms |
| Long Term Drift | - | 0.08 | - | °C | Drift over 10 years, if part is operated at 55°C |
| OS/ALERT Output Low Voltage | - | 0.4 | - | V | IOL = 3 mA |
Key Features
- High Accuracy Temperature Sensor: The ADT75 offers high accuracy temperature measurements with an overall accuracy of ±2°C from −25°C to +100°C and ±3°C from −55°C to +100°C.
- Programmable Temperature Limits: The device includes programmable temperature limits (THYST and TOS setpoints) which can trigger the OS/ALERT pin when exceeded.
- Shutdown Mode: The ADT75 features a shutdown mode that significantly reduces power consumption, with a shutdown current of typically 3 µA.
- I²C/SMBus Interface: The device supports an I²C/SMBus-compatible serial interface for easy communication with microcontrollers.
- Open-Drain Output: The OS/ALERT pin is an open-drain output that can operate in either comparator or interrupt mode, making it versatile for various applications.
- Address Selection: The device includes A0, A1, and A2 pins for address selection, allowing multiple devices to be connected on the same bus).
Applications
The ADT75ARMZ-REEL7 is suitable for a wide range of applications where precise temperature monitoring is crucial. These include:
- Industrial Automation: Temperature monitoring in industrial control systems and automation equipment.
- Consumer Electronics: Temperature sensing in consumer electronics such as laptops, smartphones, and other portable devices.
- Aerospace and Defense: High-reliability temperature monitoring in aerospace and defense applications.
- Medical Devices: Precise temperature sensing in medical equipment and devices.
- Automotive Systems: Temperature monitoring in automotive systems, including engine management and climate control.
Q & A
- What is the operating temperature range of the ADT75?
The ADT75 operates over a temperature range of −55°C to +125°C.
- What is the supply voltage range for the ADT75?
The ADT75 can be powered by a supply voltage ranging from 2.7 V to 5.5 V).
- What is the resolution of the ADC in the ADT75?
The ADC in the ADT75 has a resolution of 12 bits, providing a temperature resolution of 0.0625°C).
- How often does the ADT75 update its temperature readings?
The ADT75 updates its temperature readings every 100 ms).
- What is the purpose of the OS/ALERT pin on the ADT75?
The OS/ALERT pin is an open-drain output that becomes active when the temperature exceeds a programmable limit, and it can operate in either comparator or interrupt mode).
- Can multiple ADT75 devices be connected on the same bus?
- What is the typical supply current of the ADT75 in normal mode?
The typical supply current of the ADT75 in normal mode is 200 µA at VDD = 3.3 V).
- Does the ADT75 have a shutdown mode?
- What is the long-term drift of the ADT75 temperature sensor?
- Is the ADT75 compatible with I²C and SMBus interfaces?
