Top

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

Product Details

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.

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

Applications/Uses

  • Any Space-Constrained Thermally Sensitive Application
  • Consumer Products
  • Industrial Controls
  • Thermostatic Controls
Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 3-Wire
Logic
Functions Dual Temperature Alarms
Standalone Thermostat
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (W)/8
UMAX/8
Budgetary
Price (See Notes)
$1.91 @1k
Parametric specs for Temperature Switches
Temp. Thresh. (°C) Programmable
Package/Pins SOIC (W)/8
UMAX/8
View More

Simplified Block Diagram

DS1626, DS1726: Functional Diagram DS1626, DS1726: Functional Diagram Zoom icon

Design & Development

Click any title below to view the detail page where available.

/en/design/design-tools/ee-sim.html?

SIMULATION MODELS

DS1626 IBIS Model

Download

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal

Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 3-Wire
Logic
Functions Dual Temperature Alarms
Standalone Thermostat
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (W)/8
UMAX/8
Budgetary
Price (See Notes)
$1.91 @1k
Parametric specs for Temperature Switches
Temp. Thresh. (°C) Programmable
Package/Pins SOIC (W)/8
UMAX/8

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

Applications/Uses

  • Any Space-Constrained Thermally Sensitive Application
  • Consumer Products
  • Industrial Controls
  • Thermostatic Controls

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.

Simplified Block Diagram

DS1626, DS1726: Functional Diagram DS1626, DS1726: Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal