Overview
The ADT7420UCPZ-R2, produced by Analog Devices Inc., is a high-accuracy digital temperature sensor designed to offer exceptional performance across a wide industrial temperature range. Housed in a 4 mm × 4 mm LFCSP (Lead Frame Chip Scale Package), this sensor integrates an internal band gap reference, a temperature sensor, and a 16-bit ADC. It provides temperature measurements with a default resolution of 0.0625°C (13 bits) and can be programmed to achieve a resolution of up to 0.0078°C through the serial interface. The ADT7420UCPZ-R2 operates over a supply voltage range of 2.7 V to 5.5 V and is rated for temperatures from −40°C to +150°C, making it suitable for various industrial, medical, and environmental monitoring applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Temperature Range | −40°C | +150°C | °C | ||
| Supply Voltage | 2.7 V | 5.5 V | V | ||
| Supply Current (Normal Mode) | 210 μA | μA | At 3.3 V | ||
| Supply Current (Shutdown Mode) | 2.0 μA | μA | At 3.3 V | ||
| ADC Resolution (Default) | 13 bits (0.0625°C) | ||||
| ADC Resolution (Maximum) | 16 bits (0.0078°C) | ||||
| Temperature Accuracy | ±0.20°C | ±0.50°C | °C | Depending on temperature range and supply voltage | |
| Package Type | 16-lead LFCSP (4 mm × 4 mm) |
Key Features
- No temperature calibration or correction required by the user.
- Low power consumption with a typical power of 700 µW at 3.3 V in normal mode and 7 µW in shutdown mode.
- Programmable interrupts for overtemperature and undertemperature events.
- I2C-compatible interface with four possible I2C addresses selectable via Pin A0 and Pin A1.
- Open-drain output pins (CT and INT) for comparator and interrupt event modes.
- High accuracy and long-term stability, making it suitable for industrial, instrumentation, and medical applications.
Applications
- RTD and thermistor replacement.
- Thermocouple cold junction compensation.
- Medical equipment.
- Industrial control and test.
- Food transportation and storage.
- Environmental monitoring and HVAC.
- Laser diode temperature control.
Q & A
- What is the temperature range of the ADT7420UCPZ-R2? The ADT7420UCPZ-R2 operates over a temperature range of −40°C to +150°C.
- What is the default ADC resolution of the ADT7420UCPZ-R2? The default ADC resolution is 13 bits, which corresponds to 0.0625°C.
- Can the ADC resolution be changed? Yes, the ADC resolution can be programmed through the serial interface to achieve up to 16 bits (0.0078°C) resolution.
- What is the typical supply current in normal mode? The typical supply current in normal mode is 210 μA at 3.3 V.
- What is the shutdown current of the ADT7420UCPZ-R2? The shutdown current is typically 2.0 μA at 3.3 V.
- Does the ADT7420UCPZ-R2 require temperature calibration? No, the ADT7420UCPZ-R2 does not require temperature calibration or correction by the user.
- What communication protocol does the ADT7420UCPZ-R2 use? The ADT7420UCPZ-R2 uses an I2C-compatible interface.
- How many possible I2C addresses does the ADT7420UCPZ-R2 have? The ADT7420UCPZ-R2 has four possible I2C addresses selectable via Pin A0 and Pin A1.
- What are the applications of the ADT7420UCPZ-R2? The ADT7420UCPZ-R2 is used in various applications including RTD and thermistor replacement, thermocouple cold junction compensation, medical equipment, industrial control and test, food transportation and storage, environmental monitoring and HVAC, and laser diode temperature control.
- What is the package type of the ADT7420UCPZ-R2? The ADT7420UCPZ-R2 is packaged in a 16-lead LFCSP (4 mm × 4 mm).
