Hardware Hacking

DS1722 Description
Digital Thermometer with SPI/3-Wire Interface
DS1722 Vendor
Maxim
DS1722 Categories
Digital Thermometers & Thermostats

DS1722 Features
Temperature Measurements Require No External Components
Measures Temperatures from -55°C to +120°C. Fahrenheit Equivalent is -67°F to +248°F
Thermometer Accuracy is ±2.0°C
Thermometer Resolution is Configurable from 8 to 12 bits (1.0°C to 0.0625°C Resolution)
Data is Read From/Written to Via a Motorola Serial Peripheral Interface (SPI) or Standard 3-Wire Serial Interface
Wide Analog Power Supply Range (2.65V -5.5V)
Separate Digital Supply Allows for 1.8V Logic
Available in an 8-Pin SO (150mil), 8-Pin µMAX, and Flip-Chip Package

DS1722 Datasheet and Application Notes
DS1722 Datasheet

Parameter Value
Interface 3-Wire/SPI
Accuracy (±°C) 2
Supply Voltage Range (V) 2.65-5.5
Op. Range (°C) -55 to +120
Meas. Res. (Bits) 8 - 12
Package 8/µMAX (µSOP)
Package 8/SO.150
Package FlipChip

DS1721 Description
Digital Thermometer and Thermostat
DS1721 Vendor
Maxim
DS1721 Categories
Digital Thermometers & Thermostats

DS1721 Features
±1°C accuracy from -10°C to +85°C
Measures temperatures from -55°C to +125°C (-67°F to +257°F)
9- to 12-bit user-configurable resolution
Dedicated thermostatic logic output
Thermostatic settings are user-programmable
Data is transferred over 2-wire/SMBus interface
Three address inputs allow up to eight DS1721 to operate on one bus
2.7V to 5.5V supply range
150mil 8-pin SO (DS1721S) and 8-pin µMAX/µSOP (DS1721U) packages

DS1721 Datasheet and Application Notes
DS1721 Datasheet

Parameter Value
Interface 2-Wire/SMBus
Accuracy (±°C) 1
Supply Voltage Range (V) 2.7-5.5
Op. Range (°C) -55 to +125
Temp. Thresh. (°C) 1, Prog.
Meas. Res. (Bits) 9 - 12
Package 8/µMAX (µSOP)
Package 8/SO.150

DS1720 Description
Econ-Digital Thermometer and Thermostat
DS1720 Vendor
Maxim
DS1720 Categories
Digital Thermometers & Thermostats

DS1720 Features
Requires no External Components
Supply Voltage Range Covers from 2.7V to 5.5V
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 9-Bit Value
Converts Temperature to Digital Word in 1 Second (max)
Thermostatic Settings are User-Definable and Nonvolatile
Data is Read from/Written via a 3-Wire Serial Interface (CLK, DQ, RST-bar )
8-Pin DIP or SO (208-mil) Packages

DS1720 Datasheet and Application Notes
DS1720 Datasheet

Parameter Value
Interface 3-Wire
Accuracy (±°C) 2.5
Supply Voltage Range (V) 2.7-5.5
Op. Range (°C) -55 to +125
Temp. Thresh. (°C) 1, Prog. NV
Meas. Res. (Bits) 9
Package 8/SO.208

DS18S20 Description
1-Wire Parasite-Power Digital Thermometer
DS18S20 Vendor
Maxim
DS18S20 Categories
Digital Thermometers & Thermostats

DS18S20 Features
Unique 1-Wire interface requires only one port pin for communication
Each device has a unique 64-bit serial code stored in an onboard ROM
Multidrop capability simplifies distributed temperature sensing applications
Requires no external components
Can be powered from data line. Power supply range is 3.0V to 5.5V
Measures temperatures from -55°C to +125°C (-67°F to +257°F)
±0.5°C accuracy from -10°C to +85°C
9-bit thermometer resolution
Converts temperature in 750ms (max.)
User-definable nonvolatile (NV) alarm settings
Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)

DS18S20 Datasheet and Application Notes
DS18S20 Datasheet

Parameter Value
Interface 1-Wire®
Accuracy (±°C) 0.5
Supply Voltage Range (V) 3.0 to 5.5
Parasite Power Available
Op. Range (°C) -55 to +125
Temp. Thresh. (°C) 1, Prog. NV
Meas. Res. (Bits) 9
Package 3/TO-92
Package 8/SO.150

DS18B20 Description
High-Precision 1-Wire Digital Thermometer
DS18B20 Vendor
Maxim
DS18B20 Categories
Digital Thermometers & Thermostats

DS18B20 Features
±0.5°C accuracy from -10°C to +85°C
Measures temperatures from -55°C to +125°C (-67°F to +257°F)
9- to 12-bit user-configurable resolution
1-Wire interface requires only one port pin for communication
Has a 64-bit unique and unchangeable electronic serial number
Multi-drop capability for simplified distributed temperature sensing
Alarm function with user-defined nonvolatile alarm settings
Converts temperature to 12-bit digital word in 750ms (max.)
No external components required to sense temperature
3.0V to 5.5V supply range
Optional “parasite-power” operation (power derived directly from 1-Wire bus)
8-pin µMAX/µSOP (DS18B20U), 3-pin TO-92 (DS18B20), and 150mil 8-pin SO (DS18B20Z) packages

DS18B20 Datasheet and Application Notes
DS18B20 Datasheet

Parameter Value
Interface 1-Wire®
Accuracy (±°C) 0.5
Supply Voltage Range (V) 3.0 to 5.5
Parasite Power Available
Op. Range (°C) -55 to +125
Temp. Thresh. (°C) 1, Prog. NV
Meas. Res. (Bits) 9 - 12
Package 3/TO-92
Package 8/µMAX (µSOP)
Package 8/SO.150