DS1820

Package / Case: TO-226-3, TO-92-3 (TO-226AA)
Packaging: Bulk
Series: -
Accuracy: ±0.5°C
Output Type: Open Drain
Sensing Temperature: -55°C ~ 125°C
Manufacturer: Maxim Integrated Products
Voltage - Supply: 3 V ~ 5.5 V
Supplier Device Package: TO-92


Features:

• Unique 1WireTM interface requires only one port pin for communication
• Multidrop capability simplifies distributed temperature sensing applications
• Requires no external components
• Can be powered from data line
• Zero standby power required
• Measures temperatures from 55°C to +125°C in 0.5°C increments. Fahrenheit equivalent is 67°F to +257°F    in 0.9°F increments
• Temperature is read as a 9bit digital value.
• Converts temperature to digital word in 200 ms (typ.)
• Userdefinable, nonvolatile temperature alarm settings
• Alarm search command identifies and addresses devices whose temperature is outside of programmed limits   (temperature alarm condition)
• Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally    sensitive system

Pinout




Specifications

Voltage on Any Pin Relative to Ground                             0.5V to +7.0V
Operating Temperature                                                    55°C to +125°C
Storage Temperature                                                       55°C to +125°C
Soldering Temperature                                                      260°C for 10 seconds


Description

The DS1820 Digital Thermometer provides 9bit temperature readings which indicate the temperature of the device.

Information is sent to/from the DS1820 over a 1Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS1820. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source.

Because each DS1820 contains a unique silicon serial number, multiple DS1820s can exist on the same 1Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and in process monitoring and control.