Overview
The ADT7422CCPZ-RL7, produced by Analog Devices Inc., is a high-accuracy digital I2C temperature sensor. It is designed to meet the clinical thermometry specification of the ASTM E1112 standards, making it suitable for precise temperature measurements in various applications. The sensor features an internal band gap reference, a temperature sensor, and a precision analog-to-digital converter (ADC), providing a 16-bit temperature result with a resolution of 0.0078°C and an accuracy of up to ±0.1°C across the temperature range of 25°C to 50°C without the need for calibration after the PCB soldering process.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Range | −40°C to +125°C |
| Accuracy | Up to ±0.1°C (25°C to 50°C) |
| Resolution | 0.0078°C |
| Supply Voltage | 3.0 V |
| Average Supply Current | Typically 210 μA at 3.0 V |
| Shutdown Current | Typically 2.0 μA at 3.0 V |
| Interface | I2C-compatible |
| Package Type | 16-lead, 4 mm × 4 mm, RoHS compliant LFCSP |
| Address Selection Pins | Pin A0 and Pin A1 (four possible I2C addresses) |
Key Features
- No temperature calibration or correction required by the user.
- Low power consumption: 140 µW typical at 3.0 V in 1 SPS mode and 6 µW typical at 3.0 V in shutdown mode.
- Programmable interrupts for overtemperature and undertemperature events.
- Critical overtemperature interrupt and undertemperature interrupt via INT and CT pins.
- Fast first temperature conversion at power-up of 6 ms.
- Long-term stability and reliability.
- One shot mode for immediate conversion followed by shutdown.
Applications
- Vital signs monitoring (VSM) and medical equipment.
- Resistance temperature detector (RTD) and thermistor replacement.
- Food transportation and storage.
- Environmental monitoring and heating, ventilation, and air conditioning (HVAC).
- Laser diode temperature control).
Q & A
- What is the temperature range of the ADT7422CCPZ-RL7?
The ADT7422CCPZ-RL7 operates over a temperature range of −40°C to +125°C.
- What is the accuracy of the ADT7422CCPZ-RL7?
The accuracy is up to ±0.1°C across the temperature range of 25°C to 50°C.
- What is the resolution of the ADT7422CCPZ-RL7?
The resolution is 0.0078°C).
- Does the ADT7422CCPZ-RL7 require calibration?
No, the ADT7422CCPZ-RL7 does not require temperature calibration or correction by the user).
- What is the typical supply current of the ADT7422CCPZ-RL7?
The typical supply current is 210 μA at 3.0 V).
- What interface does the ADT7422CCPZ-RL7 use?
The ADT7422CCPZ-RL7 uses an I2C-compatible interface).
- What are the dimensions of the ADT7422CCPZ-RL7 package?
The package is a 16-lead, 4 mm × 4 mm, RoHS compliant LFCSP).
- How many possible I2C addresses does the ADT7422CCPZ-RL7 support?
The ADT7422CCPZ-RL7 supports four possible I2C addresses via Pin A0 and Pin A1).
- What are the interrupt features of the ADT7422CCPZ-RL7?
The ADT7422CCPZ-RL7 has programmable interrupts for overtemperature and undertemperature events via the INT and CT pins).
- What is the one shot mode of the ADT7422CCPZ-RL7?
The one shot mode allows the device to complete a conversion immediately and then go into shutdown mode).
