DS1721
PRODUCTIONDigital Thermometer and Thermostat
- Part Models
- 4
- 1ku List Price
- Starting From $2.50
Overview
- ±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
The DS1721 digital thermometer and thermostat features ±1°C accuracy over a -10°C to +85°C range. Thermometer data is read out over a 2-wire serial bus in 2's complement format with 9 to 12 bits of resolution (user-programmable). The DS1721 features three address inputs, allowing users to multidrop up to eight DS1721 devices on one bus.
The DS1721 offers thermostatic functionality with over-temperature (TH) and under-temperature (TL) user-programmable trip-points stored in on-chip SRAM. The two trip-points provide programmable thermostat hysteresis: the thermostat output is asserted when the measured temperature exceeds TH and it remains active until the temperature falls below TL.
The DS1721 is available in 150mil 8-pin SO (DS1721S) and 8-pin µMAX/µSOP (DS1721U) packages. For applications requiring higher precision, the DS1631 provides ±0.5°C accuracy and is functionally compatible with the DS1721.
Applications
- Alarm Systems
- Fibre Channel
- Instrumentation
- Networking
Documentation
Data Sheet 1
Reliability Data 1
Technical Articles 4
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS1721S+ | Small-Outline IC, Narrow (0.15in) | ||
| DS1721S+T&R | Small-Outline IC, Narrow (0.15in) | ||
| DS1721U+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1721U+T&R | Micro-MAX, Thin Shrink Small-Outline |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| DS1721S+ | PRODUCTION | |
| DS1721S+T&R | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Analog to Digital Converters (ADCs) 1 | ||
| DS1631 | PRODUCTION | High-Precision Digital Thermometer and Thermostat |
Tools & Simulations
IBIS Model 1
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