DS1626 Dallas, DS1626 Datasheet

DS1626

Manufacturer Part Number

DS1626

Description

High-Precision 3-Wire Digital Thermometer and Thermostat

Manufacturer

Dallas

Datasheet

1.DS1626.pdf (13 pages)

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FEATURES

§ Temperature Measurements Require No

§ Measure Temperatures from -55°C to +125°C

§ DS1626: ±0.5°C Accuracy from 0°C to

§ DS1726: ±1°C Accuracy from -10°C to

§ Output Resolution is User-Selectable to 9, 10,

§ Wide Power-Supply Range (2.7V to 5.5V)

§ Convert Temperature to Digital Word in

§ Stand-Alone Thermostat Capability

§ Thermostatic Settings are User-Definable and

§ Data is Read/Written Through a 3-Wire Serial

§ Available in 8-Pin mMAX/mSOP Package

www.maxim-ic.com

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 (T

stored in on-chip EEPROM. For stand-alone thermostat operation, T

installation, and the DS1626/DS1726 can be configured to automatically begin taking temperature

measurements at power-up.

Pin descriptions for the DS1626 and DS1726 are provided in Table 2 and user-accessible registers are

summarized in Table 3. A functional diagram is shown in Figure 1.

LOW

External Components

(-67°F to +257°F)

+70°C

+85°C

11, or 12 Bits

750ms (max)

Nonvolatile (NV)

Interface

, and T

COM

), and over-temperature (T

) and under-temperature (T

1 of 13

PIN CONFIGURATION

APPLICATIONS

§ Thermostatic Controls

§ Industrial Controls

§ Consumer Products

§ Any Space-Constrained Thermally Sensitive

Thermometer and Thermostat

High-Precision 3-Wire Digital

Application

CLK/ CNV

See Table 1 for Ordering Information

See Table 2 for Pin Descriptions

GND

RST

(DS1626U, DS1726U)

and T

DS1626/DS1726

) user-programmable thresholds

mSOP

can be programmed prior to

HIGH

LOW

COM

06/10/03

HIGH

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