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DS1626, DS1726
High-Precision 3-Wire Digital Thermometer and Thermostat
High-Precision, 3-Wire Digital Thermometers/Thermostats Provide Temperature Measurements and Stand-Alone Thermostat Capability over a -55°C to +125°C Range
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Status
Active: In Production.
Description
The DS1626 and DS1726 digital thermometers/thermostats provide temperature measurements and stand-alone thermostat capability over a -55°C to +125°C range. The DS1626 offers ±0.5°C accuracy from 0°C to +70°C and the DS1726 has ±1°C accuracy from -10°C to +85°C. The resolution of the measured temperature is user selectable from 9 to 12 bits. Communication with the DS1626 and DS1726 is achieved through a 3-wire serial bus.
The DS1626 and DS1726 offer thermostatic functionality with three dedicated thermostat outputs (THIGH, TLOW, and TCOM), and overtemperature (TH) and undertemperature (TL) user-programmable thresholds stored in on-chip EEPROM. For stand-alone thermostat operation, TH and TL can be programmed prior to installation, and the DS1626/DS1726 can be configured to automatically begin taking temperature measurements at power-up. Table 1, in the full data sheet, summarizes the user-accessible registers. Figure 1, in the full data sheet, shows a functional diagram.
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Data Sheet
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Key Features
- Temperature Measurements Require No External Components
- Measure Temperatures from -55°C to +125°C (-67°F to +257°F)
- DS1626: ±0.5°C Accuracy from 0°C to +70°C
- DS1726: ±1°C Accuracy from -10°C to +85°C
- Output Resolution is User Selectable to 9, 10, 11, or 12 Bits
- Wide Power-Supply Range (2.7V to 5.5V)
- Convert Temperature to Digital Word in 750ms (max)
- Stand-Alone Thermostat Capability
- Thermostatic Settings are User Definable and Nonvolatile (NV)
- Data is Read/Written Through a 3-Wire Serial Interface
- Available in 8-Pin µSOP Package
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Applications/Uses
- Any Space-Constrained Thermally Sensitive Application
- Consumer Products
- Industrial Controls
- Thermostatic Controls
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Key Specifications:
| Temperature Sensors |
| Part Number |
Sensor Type |
Functions |
Interface |
Accuracy
(±°C) |
Parasite Pwr. |
Temp. Thresh. |
Temp. Resolution
(bits) |
Oper. Temp.
(°C) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| DS1626 |
Local |
| Dual Output Temperature Switch | | Dual Temperature Alarms | | Standalone Thermostat | | Temperature Switch/Temperature Comparator |
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0.5 |
No |
Programmable (NV) |
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-55 to +125 |
16.2 |
$1.74 @1k |
| DS1726 |
1 |
$1.69 @1k |
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See All Temperature Sensors (103)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Temperature Switches |
| Part Number |
Switch Type |
Functions |
Interface |
Accuracy
(±°C) |
Temp. Thresh.
(°C) |
Features |
Package/Pins |
Budgetary Price |
| See Notes |
| DS1626 |
Local |
| Dual Output Temperature Switch | | Dual Temperature Alarms | | Standalone Thermostat | | Temperature Switch/Temperature Comparator |
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0.5 |
| Factory Programmed | | Programmable |
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| High Accuracy | | Nonvolatile Thermostatic Settings | | Push Pull Active High Output | | Separate High and Low Temperature Thresholds |
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$1.74 @1k |
| DS1726 |
1 |
| Push Pull Active High Output | | Separate High and Low Temperature Thresholds |
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$1.69 @1k |
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See All Temperature Switches (22)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Functional Diagram
More Information
Didn't Find What You Need?
Information Index
Rev 4;
2007-07-11
This page last modified: 2009-10-13
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