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Maxim Integrated Semiconductor Electronic Components Datasheet

DS75LV Datasheet

Digital Thermometer and Thermostat

No Preview Available !

www.maxim-ic.com
DESCRIPTION
This 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. Three address pins allow up to eight
wwwD.SD7a5taLSVhedeet4vUic.ceosmto operate on the same 2-wire bus,
which greatly simplifies distributed temperature-
sensing applications.
The DS75LV 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 thermostat operation
based on user-defined trip-points (TOS and THYST).
A block diagram of the DS75LV is shown in Figure 1
and detailed pin descriptions are given in Table 2.
APPLICATIONS
Personal Computers
Cellular Base Stations
Office Equipment
Any Thermally Sensitive System
PIN CONFIGURATION
SDA 1
8 VDD
SCL 2
7 A0
O.S. 3
6 A1
GND 4
5 A2
DS75LVS—SO (150 mils)
SDA
SCL
O.S.
GND
1
2
3
4
8 VDD
7 A0
6 A1
5 A2
DS75LVU—mSOP/mMAX
DS75LV
Digital Thermometer and Thermostat
FEATURES
§ Operating Range from 1.7V to 3.7V
§ Temperature Measurements Require No
External Components
§ Measures Temperatures from -55°C to +125°C
(-67°F to +257°F)
§ ±2°C Accuracy Over a -25°C to +100°C Range
§ Thermometer Resolution is User-
Configurable from 9 (Default) to 12 Bits (0.5°C
to 0.0625°C Resolution)
§ 9-Bit Conversion Time is 25ms (Max)
§ Thermostatic Settings are User-Definable
§ Data Read/Write Occurs Through a 2-Wire
Serial Interface (SDA and SCL Pins)
§ Data Lines Filtered Internally for Noise
Immunity (50ns Deglitch)
§ Bus Timeout Feature Prevents Lockup
Problems on 2-Wire Interface
§ Multidrop Capability Simplifies Distributed
Temperature-Sensing Applications
§ Pin/Software Compatible with the LM75
§ Available in 8-Pin mSOP (mMAX) and SO
Packages
ORDERING INFORMATION
PART
DS75LVS+
DS75LVS+T&R
DS75LVU+
DS75LVU+T&R
TEMP RANGE
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
PIN-PACKAGE
DS75LV
(150-mil) 8-SO
DS75LV
(150-mil) 8-SO,
2500 Piece
Tape-and-Reel
DS75LV
8-µSOP
(µMAX)
DS75LV
8-µSOP
(µMAX), 3000
Piece Tape-
and-Reel
Ordering Information continued at the end of the data sheet.
1 of 13
051106


Maxim Integrated Semiconductor Electronic Components Datasheet

DS75LV Datasheet

Digital Thermometer and Thermostat

No Preview Available !

ABSOLUTE MAXIMUM RATINGS*
Voltage on VDD, Relative to Ground
Voltage on Any Other Pin, Relative to Ground
Operating Temperature Range
Storage Temperature Range
Soldering Temperature
DS75LV: Digital Thermometer and Thermostat
-0.3V to +4.0V
-0.3V to +6.0V
-55°C to +125°C
-55°C to +125°C
260°C for 10 seconds
These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
The Dallas Semiconductor DS75LV is built to the highest quality standards and manufactured for long-term
reliability. All Dallas Semiconductor devices are made using the same quality materials and manufacturing
methods. However, the DS75LV is not exposed to environmental stresses, such as burn-in, that some industrial
applications require. For specific reliability information on this product, please contact the factory in Dallas at (972)
371-4448.
DC ELECTRICAL CHARACTERISTICS
www(-.5Da5t°aCShetoet4+U1.c2o5m°C; 1.7V £ VDD £ 3.7V.)
PARAMETER
SYMBOL
CONDITIONS
Supply Voltage
Thermometer Error
(Note 2)
VDD
TERR
(Note 10)
-25 to +100
-55 to +125
Input Logic High
Input Logic Low
SDA Output Logic Low
Voltage (Note 1)
VIH
VIL
VOL1
VOL2
(Note 1)
(Note 1)
3mA sink current
6mA sink current
MIN
1.7
0.7 × VDD
-0.5
0
0
MAX
3.7
± 2.0
± 3.0
5.5
0.3 × VDD
0.4
0.6
UNITS
V
°C
V
V
V
O.S. Saturation Voltage
Input current each I/O pin
I/O Capacitance
Standby Current
Active Current
(Notes 3, 4)
VOL
4mA sink current
(Notes 1, 2)
0.4 < VI/O< 0.9 VDD
CI/O
IDD1 (Notes 3, 4)
Active Temp
IDD Conversions
Communication only
0.8 V
-10 +10 mA
10 pF
2 mA
1000
100
mA
AC ELECTRICAL CHARACTERISTICS
(-55°C to +125°C; 1.7V £ VDD £ 3.7V.)
PARAMETER
SYMBOL
CONDITION
Resolution
9-bit conversions
MIN TYP MAX UNITS
9 12 bits
25
Temperature Conversion
Time
tCONVT
10-bit conversions
11-bit conversions
50
ms
100
SCL Frequency
Bus Free Time Between a
STOP and START
Condition
START and Repeated
START Hold Time from
12-bit conversions
fSCL
tBUF (Note 5)
tHD:STA
(Notes 5, 6)
2 of 13
200
400 KHz
1.3 ms
600 ns


Part Number DS75LV
Description Digital Thermometer and Thermostat
Maker Maxim Integrated Products
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DS75LV Datasheet PDF






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