DS1720S Maxim Integrated Products, DS1720S Datasheet - Page 9

• Manufacturer Part Number: DS1720S
• Description: IC THERMOMETER/STAT DIG 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS1720S

• Sensing Temperature: -55°C ~ 125°C
• Output Type: Digital
• Voltage - Supply: 2.7 V ~ 5.5 V
• Accuracy: ±2.5°C
• Package / Case: 8-SOIC (0.200", 5.30mm Width)
• Full Temp Accuracy: +/- 2.5 C
• Digital Output - Bus Interface: Serial (3-Wire)
• Digital Output - Number Of Bits: 12 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Dc: 0538
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DS1720 COMMAND SET Table 3
Read Temperature Temperature Reads last converted
Read Counter
Read Slope
Start Convert T
Stop Convert T
Write T
Write T
Read T
Read T
Write Config
Read Config
NOTES:
1. In continuous conversion mode, a Stop Convert T command will halt continuous conversion. To
2. Writing to the E
INSTRUCTION
restart, the Start Convert T command must be issued. In one–shot mode, a Start Convert T command
must be issued for every temperature reading desired.
further writes should be requested for at least 10 ms.
H
L
H
L
2
temperature value from
temperature register
Reads value of count remaining
from counter
Reads value of the slope
accumulator
Initiates temperature conversion
Halts temperature conversion
Writes high temperature limit
value into T
Writes low temperature limit value
into T
Reads stored value of high
temperature limit from T
Reads stored value of low
temperature limit from T
Writes configuration data to
configuration register
Reads configuration data from
configuration register
typically requires 10 ms at room temperature. After issuing a write command, no
TEMPERATURE CONVERSION COMMANDS
L
register
DESCRIPTION
H
register
THERMOSTAT COMMANDS
H
L
register
register
9 of 14
PROTOCOL
AAh
ACh
A0h
A9h
EEh
A1h
A2h
0Ch
22h
01h
02h
DATA AFTER
3-WIRE BUS
PROTOCOL
<write data>
<write data>
<write data>
<read data>
<read data>
<read data>
<read data>
<read data>
<read data>
ISSUING
Idle
Idle
NOTES
DS1720
2
2
2
2
2
2
1
1