DS1821S

The DS1821S is a digital temperature sensor manufactured by Maxim Integrated (now part of Analog Devices). It is designed for accurate temperature measurements in a range of applications, including industrial, HVAC, and consumer electronics. The device features a temperature range of -55°C to +125°C with an accuracy of ±0.5°C over most of its range.
The DS1821S communicates via a 1-Wire interface, allowing multiple sensors to be connected on the same bus with minimal wiring. This feature simplifies the design and reduces costs in multi-sensor applications. The sensor can be powered from the 1-Wire bus or an external power source, making it versatile for various configurations.
Key features include programmable temperature resolution, an alarm function for triggering events when temperature thresholds are crossed, and low power consumption. The DS1821S is ideal for applications requiring precise temperature monitoring and control. Its ease of integration and reliability make it a popular choice among engineers and developers.

The DS1821S is a high-accuracy digital thermometer and temperature sensor featuring a 1-Wire interface for easy integration into various applications. Key features include:
1. Temperature Range: Measures temperatures from -55°C to +125°C (-67°F to +257°F).
2. Resolution: Adjustable resolution from 9 to 12 bits, allowing for precision in measurements.
3. Accuracy: ±0.5°C accuracy in the range of -10°C to +85°C.
4. 1-Wire Interface: Allows for multiple devices on a single bus, simplifying wiring and reducing costs.
5. Power Supply: Operates on a wide voltage range from 3.0V to 5.5V, enabling flexibility in power sourcing.
6. Data Storage: Features a unique 64-bit serial number for individual identification.
7. Alarm Function: Includes programmable over-temperature and under-temperature alarms.
8. Low Power Consumption: Ideal for battery-operated devices due to its low power requirements.
The DS1821S is widely used in HVAC systems, industrial equipment, and consumer electronics for precise temperature monitoring.

The DS1821S is available in a 3-pin TO-92 package type. It is designed for temperature sensing applications and features a digital output for easy interfacing with microcontrollers.

The DS1821S is a digital temperature sensor with a total of 8 pins. Here’s a concise pinout and their functions:
1. VDD: Supply Voltage (typically 3.0V to 5.5V)
2. GND: Ground
3. DQ: Data line for communication (one-wire interface)
4. NC: No Connect (not used)
5. R1: Resistor connection for external pull-up (optional)
6. R2: Resistor connection for external pull-up (optional)
7. T_OUT: Open-drain output for temperature alarms
8. T_SENSE: Temperature sensing input (internal thermistor)
The DS1821S is capable of measuring temperatures from -55°C to +125°C with a resolution of 0.5°C. It features programmable alarm functions and can operate in a one-wire communication mode, making it suitable for various temperature monitoring applications.

The DS1821S is manufactured by Maxim Integrated, which is now part of Analog Devices, Inc. Maxim Integrated is a semiconductor company that specializes in developing analog and mixed-signal integrated circuits (ICs). The company focuses on a wide range of applications, including automotive, industrial, communications, and consumer electronics. Their products include sensors, amplifiers, voltage regulators, and digital-to-analog converters, among others. The DS1821S is a digital thermometer and thermostat designed for temperature monitoring in various applications.

The DS1821S is a digital temperature sensor commonly used in applications such as industrial temperature monitoring, HVAC systems, medical devices, automotive temperature management, and consumer electronics. Its precision and digital output make it ideal for data logging, environmental monitoring, and energy-efficient systems where accurate temperature readings are critical.

Equivalent products to the DS1821S chip include the DS1822, DS18B20, and DS18S20. These are all digital temperature sensors from Dallas Semiconductor (Maxim Integrated), featuring 1-Wire interfaces and varying temperature ranges and resolutions. Always check specific datasheets for exact specifications and compatibility.