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. Communication with the DS7505 is achieved through a simple 2-wire serial interface. Three address pins allow up to eight DS7505 devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications.
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
Applications/Uses
Operating Range from 1.7V to 3.7V
Temperature Measurements Require No External Components
Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
±0.5°C Accuracy Over a 0°C to +70°C Range
Thermometer Resolution is User-Configurable from 9 (Default) to 12 Bits (0.5°C to 0.0625°C Resolution)
9-Bit Conversion Time is 25ms (max)
Thermostatic Settings are User-Definable and Nonvolatile (NV)
Stand-Alone Thermostat Capability
Data Read/Write Occurs Through a 2-Wire Serial Interface (SDA and SCL Pins)
Data Lines Filtered Internally for Noise Immunity (50ns Deglitch)
Optional Bus Timeout Feature Prevents Lockup Problems on 2-Wire Interface
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.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-2
of
2
DS7505
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TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS7505S+
SOIC;8 pin;31 mm²
Dwg: 56-G2008-001C (PDF)
Use pkgcode/variation: S8+2*
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