DS9108 Maxim, DS9108 Datasheet

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DS9108

Manufacturer Part Number
DS9108
Description
This product is a sealed plastic stick containing three DS1921G iButtons®
Manufacturer
Maxim
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS91088
Manufacturer:
DALLAS
Quantity:
20 000
iButton and 1-Wire are registered trademarks of Dallas Semiconductor.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
www.maxim-ic.com
GENERAL DESCRIPTION
This product is a sealed plastic stick containing three
DS1921G iButtons®. The iButtons 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-Wire® reader/writer to make contact to the
iButtons 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.
APPLICATIONS
TYPICAL OPERATING CIRCUIT
*See Application Note 3829 for R
V
Concrete Maturity Monitoring
CC
Portable
1-Wire
reader
IO
GND
R
PUP
*
pup
Temperature
resistor size selection.
Red
Black
Monitor
1 of 3
FEATURES
ORDERING INFORMATION
Shipped in bulk with the wires bundled with a tie
*Indicates depth of concrete to monitor, actual stick
BLOCK DIAGRAM
length is 0.25” (0.6cm) less then depth
DS9108-8#
DS9108-10#
DS9108-12#
DS9108-15#
Black
Red
wire
wire
Three DS1921G networked to monitor temperate
at the top, bottom and center of the stick
Connects to 1-Wire reader/writer through color-
coded 18 AWG (1 mm Ø) stranded wires with ½
inch (1.3cm) stripped ends
Electrically compatible to the DS1921G
Thermochron iButton (3 in parallel)
Sealed against liquid intrusion
Module position information stored in DS1921G
memory
GND
PART
Stranded wire
Ends twisted
IO
Concrete Temperature
TEMP RANGE
-20°C to 65°C
-20°C to 65°C
-20°C to 65°C
-20°C to 65°C
Transition wire to
metal plate
DS1921G
U1
TOP
#1
Metal plates welded
to iButtons
DS1921G
MIDDLE
PIN-PACKAGE
8
10
12
15
U2
” (20.3 cm) depth*
#2
Monitor
” (25.4 cm) depth
” (30.5 cm) depth
” (38.1 cm) depth
DS9108
REV: 091806
DS1921G
BOTTOM
U3
#3

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DS9108 Summary of contents

Page 1

... Metal plates welded Stranded wire to iButtons Ends twisted DS1921G DS1921G #2 #1 MIDDLE TOP Transition wire to metal plate DS9108 Monitor ” (25.4 cm) depth ” (30.5 cm) depth ” (38.1 cm) depth U3 DS1921G #3 BOTTOM REV: 091806 ...

Page 2

... Black Wire iButton LOCATION WITHIN MODULE Each DS1921G in the DS9108 module contains a memory tag marker to indicate its position in the assembly. The position mark is a CRC16 validated packet starting on page 15 in the user memory. The memory image for ‘TOP’, ‘MIDDLE’, and ‘BOTTOM’: Table 1 ...

Page 3

... The module is inserted into wet concrete with the top approximately 0.25 inches (0.6cm) below the surface. The wires are draped on the surface for later data retrieval. Concrete Surface 0.25 PACKAGE INFORMATION 0.20 (0.5) 0.63 (1.6) 1.10 (2.8) Bottom iButton M B Concrete Depth L 8 (20.3) 7.75 (19.7) 10 (25.4) 9.75 (24.8) 12 (30.5) 11.75 (29.8) 15 (38.1) 14.75 (37.5) Inches (centimeters) L Middle iButton B M .60 (1.5) 3.88 (9.9) .60 (1.5) 4.88 (12.4) .60 (1.5) 5.88 (14.9) .60 (1.5) 7.38 (18. DS9108 Concrete Temperature Monitor Top iButton T T .60 (1.5) .60 (1.5) .60 (1.5) .60 (1.5) ...

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