DS7505：High-Precision Digital Thermometer and Thermostat

Improved LM75/DS75 Software-Compatible Temperature Sensor Is ±0.5°C Accurate and Has Nonvolatile Thermostat Thresholds

The DS7505 low-voltage (1.7V to 3.7V) digital thermometer and thermostat provides 9-, 10-, 11-, or 12-bit digital temperature readings over a -55°C to +125°C range with ±0.5°C accuracy over a -0°C to +70°C range. A 9-bit resolution mode is software compatible with the LM75. The DS7505 thermostat has a dedicated open-drain output (O.S.) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated. There are two thermostatic operating modes that control thermostat operation based on user-defined trip points (TOS and THYST) that are stored in EEPROM registers.

Key Features

Extends Performance Range with a Low-Voltage, 1.7V to 3.7V Operating Range
Maximizes System Accuracy in Broad Range of Thermal Management Applications
- Measures Temperature from -55°C to +125°C (-67°F to +257°F)
- ±0.5°C Accuracy Over a 0°C to +70°C Range
- User-Configurable Resolution from 9 Bits (Default) to 12 Bits (0.5°C to 0.0625°C Resolution)
Reduces Cost with No External Components and Stand Alone Thermostat Capability
Increases Reliability and System Robustness
- Internally Filtered Data Lines for Noise Immunity (50ns Deglitch)
- Bus Timeout Feature Prevents Lockup on a 2-Wire Interface
Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability
- Up to Eight Devices Can Operate on a 2-Wire Bus
Fast 25ms (max) 9-Bit Conversion Time
Flexible and Nonvolatile (NV) User-Defined Thermostatic Modes

DS7505: Block Diagram

Applications/Uses

Any Thermally Sensitive System
Cellular Base Stations
Medical Equipment
Networking Equipment
Office Equipment

DataSheet

title	Download file
DS7505 Data Sheet	DS7505.pdf

Parametrics

Part Number	Sensor Type	Functions	Interface	Channels	Accuracy (±°C)	Parasite Pwr.	Temp. Thresh.	Temp. Resolution (bits)	Multi Droppable	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Sensor Type	Functions	Interface	Channels	Accuracy (±°C)	Parasite Pwr.	Temp. Thresh.	Temp. Resolution (bits)	Multi Droppable	Oper. Temp. (°C)	Package/Pins	See Notes
DS7505	Local	Standalone Thermostat	2-Wire/I2C/SMBus	One	0.5	No	Programmable (NV)	9 10 11 12	Yes	-55 to +125	µMAX/8 SOIC(N)/8	$1.31 @1k

Quality and Environmental Data

DS7505.pdf

Ordering Information

Part Number	Status	Package	Temp	RoHS
DS7505S+	Active	SOIC(N),;8 pin;30.9 mm²	-55°C to +125°C	Lead Free
DS7505S+T&R	Active	SOIC(N),;8 pin;30.9 mm²	-55°C to +125°C	Lead Free
DS7505U+	Active	µMAX,;8 pin;15.6 mm²	-55°C to +125°C	Lead Free
DS7505U+T&R	Active	µMAX,;8 pin;15.6 mm²	-55°C to +125°C	Lead Free