DS1822+ Maxim Integrated Products, DS1822+ Datasheet - Page 13

Board Mount Temperature Sensors IC THERMOMETER ECONO DIG

DS1822+

Manufacturer Part Number
DS1822+
Description
Board Mount Temperature Sensors IC THERMOMETER ECONO DIG
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1822+

Temperature Threshold
Programmable
Full Temp Accuracy
+/- 2 C
Package / Case
TO-92
Digital Output - Bus Interface
1-Wire
Digital Output - Number Of Bits
9 bit to 12 bit
Supply Voltage (max)
5.5 V
Supply Voltage (min)
3 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Output Type
Digital
Supply Current
1.5 mA
Ic Output Type
Digital
Sensing Accuracy Range
± 2°C
Supply Voltage Range
3V To 5.5V
Resolution (bits)
12bit
Sensor Case Style
TO-92
No. Of Pins
3
Accuracy %
2°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
ROM COMMANDS FLOW CHART Figure 11
SERIAL NUMBER
FAMILY CODE
READ ROM
COMMAND
DS1822 T
DS1822 T
CRC BYTE
DS1822 T
6 BYTES
1 BYTE
33h
Y
X
X
X
Initialization
Sequence
N
MATCH ROM
MASTER T
MASTER T
MASTER T
COMMAND
MATCH?
MATCH?
MATCH?
BIT 63
BIT 0
BIT 0
BIT 63
BIT 1
BIT 1
55h
Y
Y
Y
Y
MASTER T
X
X
RESET PULSE
X
PRESENCE
MASTER T
COMMAND
DS1822 T
N
PULSE
N
N
N
X
ROM
X
X
(FIGURE 12)
MASTER T
COMMAND
FUNCTION
N
N
N
MASTER T
MASTER T
DS1822 T
DS1822 T
DS1822 T
DS1822 T
MASTER T
DS1822 T
DS1822 T
SEARCH ROM
13 of 21
COMMAND
MATCH?
MATCH?
Y
Y
MATCH?
BIT 0
BIT 1
BIT 63
X
F0h
X
X
X
X
X
X
X
X
Y
BIT 63
X
BIT 63
BIT 0
BIT 0
BIT 63
BIT 0
BIT 1
BIT 1
Y
BIT 1
N
MASTER T
ALARM SEARCH
DS1822 T
DS1822 T
WITH ALARM
COMMAND
FLAG SET?
DEVICE(S)
ECh
X
X
X
Y
Y
BIT 0
BIT 0
BIT 0
N
N
COMMAND
SKIP ROM
CCh
Y
N
DS1822

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