DS1721S+
Sensors
Interface: I2C
Tolerance: ±1℃
Technical Specifications
| Type | Description |
|---|---|
| Operating Temperature | - |
| Supply Voltage | 2.7V~5.5V |
| Interface | I2C |
| Features | Factory temperature calibration;Temperature threshold monitoring;Low-power standby;Configurable temperature output;Hardware comparator / independent temperature control output |
| Detection Temperature Range | -55°C~+125°C |
| Type | Description |
|---|---|
| Tolerance | ±1°C |
| Standby Current | 800nA |
| Temperature Conversion Time | 750ms |
| Temperature Resolution | 12 bit |
| Package / Case | SOIC-8 |
Product Introduction
The DS1721 2-Wire Digital Thermometer and Thermostat provides 12-bit temperature readings, which indicate the temperature of the device. Thermostatic settings and temperature readings are all communicated to/from the DS1721 over a simple 2-wire serial interface. No additional components are required; the device is truly a “temperature-to-digital” converter.
The DS1721 has three address bits that allow a user to multidrop up to eight sensors along the 2-wire bus, greatly simplifying the bussing of distributed temperature sensing networks.
The thermal alarm output, TOUT, is active when the temperature of the device exceeds a user-defined temperature TH. The output remains active until the temperature is equal to or below the user-defined temperature TL, allowing for any hysteresis necessary. The active state of TOUT is configurable by the user.
For applications that require faster conversion times, the user can adjust the readout resolution from 12 to 9 bits, effectively reducing the conversion time from 750ms (MAX) to 93.75 ms (MAX). This is particularly useful in applications where temperature changes large magnitudes very rapidly.
Features
- Temperature measurements require no external components with ± 1 ℃ accuracy
- Measures temperatures from - 55 ℃ to + 125 ℃; Fahrenheit equivalent is - 67 °F to + 257 °F
- Temperature resolution is configurable from 9 to 12 (default) bits (0.5 ℃ to 0.0625 ℃ resolution)
- Maximum conversion time (9-bit resolution) of 93.75 ms
- Thermostatic settings are user-definable
- Data is read/written via a 2-wire serial interface (open drain I/O lines); 3-bit addressability
- Wide power supply range (2.7V - 5.5V)
- 8-pin, 150-mil SOIC package and 8-pin μSOP package
Applications
- personal computers/services
- cellular telephones
- office equipment
- any microprocessor-based, thermally sensitive system
Datasheet
Alternative Parts
Common DS1721S+ alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 9025191010 |
| USHTS | 9025194000 |
| TARIC | 9025190010 |
| Type | Details |
|---|---|
| CAHTS | 9025190011 |
| BRHTS | 90251910 |
| INHTS | 90251910 |
| MXHTS | 9025.19.01 |
Sourcing Information
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Our Shenzhen sourcing team can help with supplier sourcing, availability checks and quotation comparison for DS1721S+, then coordinate procurement, supplier screening, inspection and international shipping based on what you need.
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