DS7505
Digital Thermometer and Thermostat
General Description
Benefits and Features
● Extends Performance Range with a Low-Voltage,
The DS7505 low-voltage (1.7V to 3.7V) digital thermom-
eter and thermostat provides 9-, 10-, 11-, or 12-bit digital
temperature readings over a -55°C to +125°C range with
±0.5°C accuracy over a -0°C to +70°C range. A 9-bit reso-
lution mode is software compatible with the LM75.
1.7V to 3.7V Operating Range
● Maximizes System Accuracy in Broad Range of
Thermal Management Applications
• Measures Temperature from -55°C to +125°C
(-67°F to +257°F)
• ±0.5°C Accuracy Over a 0°C to +70°C Range
• User-Configurable Resolution from 9 Bits (Default)
to 12 Bits (0.5°C to 0.0625°C Resolution)
The DS7505 thermostat has a dedicated open-drain
output (O.S.) and programmable fault tolerance, which
allows the user to define the number of consecutive error
conditions that must occur before O.S. is activated. There
are two thermostatic operating modes that control thermo-
● Reduces Cost with No External Components and
stat operation based on user-defined trip points (T
and
OS
Stand Alone Thermostat Capability
T
) that are stored in EEPROM registers.
HYST
● Increases Reliability and System Robustness
• Internally Filtered Data Lines for Noise Immunity
(50ns Deglitch)
Applications
● Networking Equipment
● Cellular Base Stations
● Office Equipment
• Bus Timeout Feature Prevents Lockup on a 2-Wire
Interface
● Simplifies Distributed Temperature-Sensing
Applications with Multidrop Capability
● Medical Equipment
● Any Thermally Sensitive System
• Up to Eight Devices Can Operate on a 2-Wire Bus
● Fast 25ms (max) 9-Bit Conversion Time
● Flexible and Nonvolatile (NV) User-Defined
Pin Configurations
Thermostatic Mode
s
TOP VIEW
SDA
SCL
O.S.
GND
1
2
3
4
8
7
6
5
VDD
A0
Ordering Information
DS7505
PART
TEMP RANGE
PIN-PACKAGE
A1
DS7505S+
-55°C to +125°C 8 SO (150 mils)
A2
8 SO (150 mils),
-55°C to +125°C
DS7505S+T&R
DS7505U+
2500-Piece T&R
SO
-55°C to +125°C 8 µMAX®
SDA
SCL
O.S.
GND
1
2
3
4
8
7
6
5
VDD
A0
8 µMAX,
-55°C to +125°C
DS7505U+T&R
DS7505
3000-Piece T&R
A1
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
A2
µMAX
Commands are capitalized for clarity.
μMAX is a registered trademark of Maxim Integrated Products,
Inc.
19-7471; Rev 3; 12/15