DS9108 Datasheet, PDF (2/3 Pages) Maxim Integrated Products – Concrete Temperature Monitor

DS9108 Concrete Temperature Module
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground
Operating Temperature Range
Storage Temperature Range
See DS1921G Datasheet
-4°F to 149°F (-20°C to +65°C)
See DS1921G Datasheet
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.
SPECIFICATIONS
(See DS1921G datasheet, T_A = -4°F to 149°F (-20°C to +65°C) (Note 1))
PARAMETER
CONDITIONS
MIN
TYP
MAX
2.5
Weight
72
Physical Dimensions
See technical drawing
Wire Length
12.9
13.1
32.8
33.3
10
Tensile Strength of Wires
44.5
Thermal Response Time
(Note 2)
500
UNITS
ounces
grams
inches
cm
lbf
Newton
s
Note 1: Assembled module production tested at 77°F (25°C).
Note 2: Response time in water is the time required for the recorded value to read 63% of the temperature’s real variation.
Material: PVC with PVC cement and E-60NC black Hysol epoxy for wire sealant
PIN DESCRIPTION
PIN
NAME
Red Wire
Black Wire
IO
GND
FUNCTION
1-Wire bus interface. Open drain, requires external pull-up resistor.
Ground Reference
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. Memory Tag Description
TAG TYPE
TOP
MIDDLE
BOTTOM
ADDRESS
1E0h–1E3h
CONTENTS
(HEX)
01 54 FA 60
01 4D 3B AA
01 42 7B AE
DESCRIPTION
‘T’ in a CRC validated packet
‘M’ in a CRC validated packet
‘B’ in a CRC validated packet
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