DS9108 Datasheet | Maxim Integrated

.. .maxim-ic. DS9108 Concrete Temperature Monitor - - - - - GENERAL DESCRIPTION This product is a sealed plastic stick containing three DS1921G i ButtonsÒ. The i Buttons are connected in parallel through metal plates that are spot-welded to the IO and GND contact, respectively. Two stranded wires protruding from the top end of the stick allow for a 1-WireÒ reader/write to make contact to the i Buttons for setup and data retrieval. Electrically, the product is specified by the DS1921G data sheet, with the proper scaling (e.g., current ×3, capacitance ×3). The mechanical and thermal characteristics of the module are specified in this document. Features Three DS1921G networked to monitor temperate at the top, bottom and center of the stick Connects to 1-Wire reader/writer through colorcoded 18 AWG (1 mm Ø) stranded wires with ½ inch (1.3 cm) stripped ends Electrically patible to the DS1921G Thermochron i Button (3 in parallel) Sealed against liquid intrusion Module position information stored in DS1921G memory APPLICATIONS - Concrete Maturity Monitoring ORDERING INFORMATION PART DS9108-080 DS9108-100 DS9108-120 DS9108-150 TEMP RANGE -20°C to 65°C -20°C to 65°C -20°C to 65°C -20°C to 65°C PIN-PACKAGE 8” (20.3 cm) depth- 10” (25.4 cm) depth 12” (30.5 cm) depth 15” (38.1 cm) depth Shipped in bulk with the wires bundled with a tie - Indicates depth of concrete to monitor, actual stick length is 0.25” (0.6 cm) less then depth TYPICAL OPERATING CIRCUIT VCC RPUP- BLOCK DIAGRAM Stranded wire Ends twisted U1 IO Metal plates welded to i Buttons U2 U3 Portable 1-Wire reader Temperature Monitor IO GND Red Black Red wire DS1921G #1 TOP DS1921G #2 MIDDLE DS1921G #3 BOTTOM Black wire Transition wire to metal plate - See Application Note 3829 for Rpup resistor size selection. i Button and 1-Wire are registered trademarks of Dallas Semiconductor. Note: Some revisions of this device may incorporate deviations from published specifications...