DS1721U+

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Analog Devices Inc./Maxim Integrated

TEMP SENSOR DIGITAL SERIAL (2-WIRE) 8-PIN UMAX TUBE

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DS1721U+

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Analog Devices Inc./Maxim Integrated

TEMP SENSOR DIGITAL SERIAL (2-WIRE) 8-PIN UMAX TUBE

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Description Specifications Series Pricing CAD Documents

Description

General part information

DS1721 Series

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 THand 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, theDS1631provides ±0.5°C accuracy and is functionally compatible with the DS1721.ApplicationsAlarm SystemsFibre ChannelInstrumentationNetworking

Technical Specifications

Parameters and characteristics for this part

Specification	DS1721U+

Accuracy - Highest	1 °C
Accuracy - Lowest	2 °C
Features	Output Switch, Programmable Resolution, One-Shot, Standby Mode, Programmable Limit
Mounting Type	Surface Mount
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-55 °C
Output Type	I2C
Package Length	0.118 in
Package Name	8-uMAX/uSOP, 8-TSSOP, 8-MSOP
Package Width	3 mm
Resolution	11 b
Sensing Temperature - Local (Max)	125 °C
Sensing Temperature - Local (Min)	-55 °C
Sensor Type	Local, Digital
Test Condition (Alternate) Maximum	125 ¯C
Test Condition (Alternate) Minimum	-55 °C
Test Condition (Primary) Maximum	85 °C
Test Condition (Primary) Minimum	-10 °C
Voltage - Supply (Maximum)	5.5 V
Voltage - Supply (Minimum)	2.7 V

DS1721 Series

Digital Thermometer and Thermostat

Part	Operating Temperature (Max)	Operating Temperature (Min)	Sensor Type	Features	Accuracy - Highest	Accuracy - Lowest	Mounting Type	Resolution	Test Condition (Alternate) Maximum	Test Condition (Primary) Minimum	Test Condition (Primary) Maximum	Test Condition (Alternate) Minimum	Package Name	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Output Type	Package Width	Package Length	Sensing Temperature - Local (Min)	Sensing Temperature - Local (Max)
Analog Devices Inc./Maxim Integrated DS1721U+T&R	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-TSSOP 8-MSOP 8-uMAX/uSOP	5.5 V	2.7 V	I2C	3 mm	0.118 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721U	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-TSSOP 8-MSOP 8-uMAX/uSOP	5.5 V	2.7 V	I2C	3 mm	0.118 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721U+	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-TSSOP 8-MSOP 8-uMAX/uSOP	5.5 V	2.7 V	I2C	3 mm	0.118 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721S+	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-SOIC	5.5 V	2.7 V	I2C	3.9 mm	0.154 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721S	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-SOIC	5.5 V	2.7 V	I2C	3.9 mm	0.154 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721S+T&R	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-SOIC	5.5 V	2.7 V	I2C	3.9 mm	0.154 in	-55 °C	125 °C
Analog Devices Inc./Maxim Integrated DS1721S/T&R	125 °C	-55 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	1 °C	2 °C	Surface Mount	11 b	125 ¯C	-10 °C	85 °C	-55 °C	8-SOIC	5.5 V	2.7 V	I2C	3.9 mm	0.154 in	-55 °C	125 °C

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - Micro-MAX, Thin Shrink Small-Outline

DS1721 Reliability Data

Datasheet