Overview
The ADT75BRMZ-REEL, produced by Analog Devices Inc., is a highly accurate and compact digital temperature sensor. This device is designed to provide precise temperature measurements and is packaged in an 8-lead MSOP (Micro Small Outline Package). The ADT75 is a complete temperature monitoring system that includes a band gap temperature sensor and a 12-bit analog-to-digital converter (ADC). It operates over a wide supply voltage range from 2.7 V to 5.5 V and is rated for operation in temperatures from −55°C to +125°C, making it suitable for a variety of industrial and automotive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | 5.5 | V | ||
| Supply Current (Normal Mode) | 200 | µA | VDD = 3.3 V | ||
| Shutdown Current | 3 | µA | |||
| Temperature Range | −55 | 125 | °C | ||
| 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 | ||
| Temperature Hysteresis | 0.03 | °C | Temperature cycle = 25°C to 125°C to 25°C | ||
| OS/ALERT Output Low Voltage | 0.4 | V | IOL = 3 mA | ||
| OS/ALERT Pin Capacitance | 10 | pF | |||
| OS/ALERT High Output Leakage Current | 0.1 | 5 | µA | OS/ALERT pin pulled up to 5.5 V |
Key Features
- High Accuracy: The ADT75 offers high accuracy with ±2°C from −25°C to +100°C and ±1°C from 0°C to +70°C for different grades.
- Compact Package: Available in an 8-lead MSOP package, making it suitable for space-constrained applications.
- Wide Operating Range: Operates over a supply voltage range of 2.7 V to 5.5 V and a temperature range of −55°C to +125°C.
- Low Power Consumption: Features a normal mode supply current of 200 µA and a shutdown mode current of 3 µA.
- SMBus/I2C Compatibility: The serial interface is SMBus/I2C-compatible, facilitating easy integration into various systems).
- Programmable Alert Function: The OS/ALERT pin can be configured to operate in either comparator or interrupt mode, providing flexible alert mechanisms).
- Address Selection: The A0, A1, and A2 pins are available for address selection, allowing multiple devices to be connected on the same bus).
Applications
- Industrial Automation: Suitable for temperature monitoring in industrial control systems and automation equipment.
- Automotive Systems: Used in automotive applications where precise temperature monitoring is critical, such as in engine control units and climate control systems.
- Medical Devices: Applicable in medical equipment where accurate temperature sensing is essential, such as in patient monitoring systems and medical imaging devices.
- Consumer Electronics: Can be used in consumer electronics like smart home devices, HVAC systems, and other temperature-sensitive applications.
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 operate with supply voltages from 2.7 V to 5.5 V).
- What is the resolution of the ADT75's ADC?
The ADT75 has a 12-bit ADC resolution, 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 typical supply current in normal mode for the ADT75?
The typical supply current in normal mode is 200 µA at VDD = 3.3 V).
- Can the ADT75 be used in multiple device configurations?
Yes, the ADT75 allows multiple devices to be connected on the same bus using address selection pins A0, A1, and A2).
- What is the purpose of the OS/ALERT pin on the ADT75?
The OS/ALERT pin can be configured to operate in either comparator or interrupt mode to alert when the temperature exceeds a programmable limit).
- Is the ADT75 RoHS compliant?
Yes, the ADT75 is RoHS compliant).
- What is the typical long-term drift of the ADT75?
The typical long-term drift is 0.08°C over 10 years if operated at 55°C).
- What interface does the ADT75 use for communication?
The ADT75 uses an SMBus/I2C-compatible serial interface).
