DS620 Datasheet, PDF (1/15 Pages) Dallas Semiconductor – Low-Voltage, +-0.5°C Accuracy Digital Thermometer and Thermostat

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DS620
Low-Voltage, ±0.5°C Accuracy
Digital Thermometer and Thermostat
GENERAL DESCRIPTION
The DS620 digital thermometer and thermostat
provides low-voltage (1.7V £ V_DD £ 3.5V) temperature
measurements with ±0.5°C accuracy from 0°C to
+70°C and an operating temperature range of -55°C
to +125°C. The DS620 communicates over a 2-wire
digital interface. For distributed-sensing applications,
it is multidroppable with three address pins that allow
up to eight DS620s to operate on a single bus.
The DS620 has thermostat functionality with user-
defined thresholds stored in EEPROM registers, and
it can be configured for standalone thermostat
operation. The programmable output (PO) pin serves
as the thermostat output, and this pin can also be
configured to function as an active-low control for
peripheral devices.
APPLICATIONS
Portable Applications
Low-Voltage Temperature-Sensitive Applications
Computers/Servers
Test Equipment
Medical Instruments
Industrial Applications
FEATURES
§ Low-Voltage Operation: 1.7V to 3.5V
§ ±0.5°C Accuracy from 0°C to +70°C
§ Operating Temperature Range: -55°C to +125°C
(-67°F to +257°F)
§ Temperature Measurements Require No
External Components
§ Resolution is User-Selectable to 10-, 11-, 12-, or
13-Bits (0.5°C, 0.25°C, 0.125°C, and 0.0625°C
LSb Weight, Respectively)
§ Multidroppable
§ Fast (200ms max) Temperature-to-Digital
Conversion Time
§ Thermostatic Settings are User-Definable and
Nonvolatile
§ Standalone Thermostat Capability
§ Data is Read/Written Through a 2-Wire Serial
Interface
§ Package: 8-Pin mSOP
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS620U
-55°C to +125°C
8 µSOP,
Exposed Pad
DS620U/T&R
-55°C to +125°C
8 µSOP
Exposed Pad
Tape-and-Reel
TYPICAL OPERATING CIRCUIT
PIN CONFIGURATION
1.7V to 3.5V
1.7V to 3.5V
SDA
SCL
HOST
VDD
SDA
SCL
PO
DS620
A0
A1
A2
GND
Thermostat
DS620
SDA ¹
8 _VDD
SCL ²
7 _A0
PO 3
6 _A1
GND ⁴
5 A2
8-Pin mSOP Package
Exposed Pad
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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