Overview
The ADT7302ARMZ is a highly accurate, micropower digital temperature sensor produced by Analog Devices Inc. This component is designed to provide precise temperature measurements and is available in compact SOT-23 and MSOP packages. It integrates a band gap temperature sensor and a 13-bit analog-to-digital converter (ADC), enabling it to monitor and digitize temperature readings with a high resolution of 0.03125°C. The device operates over a wide temperature range of −40°C to +125°C and features a flexible serial interface compatible with SPI, QSPI, and MICROWIRE protocols, as well as DSPs.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Temperature Accuracy | ±1 | ±2 | ±3 | °C | TA = 0°C to 70°C, TA = −20°C to +85°C, TA = −40°C to +125°C |
| Temperature Resolution | 0.03125 | °C | |||
| Autoconversion Update Rate | 1.5 sec | Temperature measurement every 1.5 seconds | |||
| Temperature Conversion Time | 1.2 ms | ||||
| Thermal Time Constant | 2 sec | ||||
| Supply Voltage | 2.7 | 5.25 | V | For specified performance | |
| Supply Current (Normal Mode) | 1.6 | 2.2 | mA | VDD = 3.3 V, powered up and converting | |
| Shutdown Current | 1 μA | ||||
Key Features
- 13-bit temperature-to-digital converter with ±2°C accuracy over the operating temperature range.
- High temperature resolution of 0.03125°C.
- Wide operating temperature range of −40°C to +125°C.
- Low power consumption with a shutdown current of 1 μA and power dissipation of 0.631 mW at VDD = 3.3 V.
- Flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSPs.
- Compact SOT-23 and MSOP packages for space-saving designs.
- Standby mode controlled via the serial interface.
Applications
- Medical equipment
- Automotive systems
- Environmental controls
- Oil temperature and hydraulic systems
- Cell phones and hard disk drives
- Personal computers and electronic test equipment
- Office equipment and domestic appliances
- Process control systems
Q & A
- What is the temperature accuracy of the ADT7302ARMZ?
The ADT7302ARMZ has a temperature accuracy of ±2°C over the 0°C to 70°C range, ±2.5°C over the −20°C to +85°C range, and ±3°C over the −40°C to +125°C range. - What is the temperature resolution of the ADT7302ARMZ?
The temperature resolution is 0.03125°C. - What is the autoconversion update rate of the ADT7302ARMZ?
The autoconversion update rate is every 1.5 seconds. - How long does a temperature conversion take?
A temperature conversion typically takes 1.2 ms. - What is the supply voltage range for the ADT7302ARMZ?
The supply voltage range is from 2.7 V to 5.25 V. - What is the shutdown current of the ADT7302ARMZ?
The shutdown current is 1 μA. - Is the ADT7302ARMZ compatible with various serial interfaces?
Yes, it is compatible with SPI, QSPI, MICROWIRE, and DSPs. - In what packages is the ADT7302ARMZ available?
The ADT7302ARMZ is available in SOT-23 and MSOP packages. - Can the ADT7302ARMZ be placed in a standby mode?
Yes, it can be placed in a standby mode via the control register. - What are some common applications of the ADT7302ARMZ?
Common applications include medical equipment, automotive systems, environmental controls, and various electronic devices.
