DS75LV
Digital Thermometer and Thermostat
General Description
Benefits and Features
● Extend Performance Range with Low-Voltage,
The DS75LV low-voltage (1.7V to 3.7V) digital thermometer
and thermostat provides 9, 10, 11, or 12-bit digital temperature
readings over a -55°C to +125°C range with ±2°C accuracy
over a -25°C to +100°C range. At power-up, the DS75LV
defaults to 9-bit resolution for software compatibility with the
LM75. Communication with the DS75LV is achieved through
a simple 2-wire serial interface.
1.7V to 3.7V Operating Range
● Maximize System Accuracy in Broad Range of
Thermal Management Applications
• Measures Temperature from -55°C to +125°C
(-67°F to +257°F)
• ±2°C Accuracy over a -25°C to 100°C Range
• User-Configurable Resolution from 9 Bits (Default)
to 12 Bits (0.5°C to 0.0625°C)
The DS75LV thermostat has a dedicated open-drain output
(OS) and programmable fault tolerance, which allows the
user to define the number of consecutive error conditions that
must occur before OS is activated. There are two thermostatic
operating modes that control thermostat operation based on
● Easy Upgrade to LM75: Pin and Software Compatible
● Simplify Distributed Temperature-Sensing
Applications with Multidrop Capability
user-defined trip-points (T and T
).
HYST
OS
• Up to Eight DS75LVs Can Operate on 2-Wire Bus
● Increase Reliability and System Robustness
• Internally Filtered Data Lines for Noise Immunity
(50ns Deglitch)
Applications
● Personal Computers
● Cellular Base Stations
● Office Equipment
• Bus Timeout Feature Prevents Lockup on 2-Wire
Interface
● Any Thermally Sensitive System
● Minimize Power Consumption with Built-In Shutdown
Mode
Ordering Information appears at end of data sheet.
● Flexible User-Defined Thermostatic Modes with
Programmable Fault Tolerance
Functional Block Diagram
PRECISION
OVERSAMPLING
DIGITAL
REFERENCE
MODULATOR
DECIMATOR
V
DD
CONFIGURATION
REGISTER
SCL
SDA
ADDRESS
AND
I/O CONTROL
TEMPERATURE
REGISTER
A0
A1
A2
R
P
OS
TOS AND THYST
REGISTERS
THERMOSTAT
COMPARATOR
GND
DS75LV
19-7469; Rev 5; 11/16