Rainbow Electronics DS1631 - Manual

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FEATURES
§ Temperature measurements require no
external components
§ Measures temperatures from -55°C to +125°C
(-67°F to +257°F)
§ ±0.5°C accuracy over a range of 0°C to
+70°C
§ Output resolution is user-selectable to 9, 10,
11, or 12 bits
§ Wide power-supply range (2.7V to 5.5V)
§ Converts temperature to digital word in
750ms (max)
§ Multidrop capability simplifies distributed
temperature-sensing applications
§ Thermostatic settings are user-definable and
nonvolatile (NV)
§ Data is read/written through a 2-wire serial
interface (SDA and SCL pins)
§ Applications include thermostatic controls,
industrial systems, consumer products,
thermometers, or any thermally sensitive
system
§ Available in 8-pin SO (150mil) and mSOP
packages
PIN ASSIGNMENT
PIN DESCRIPTION
SDA - Open-Drain Data I/O
SCL
- Clock Input
T
OUT
- Thermostat Output
GND - Ground
V
DD
- Power Supply (2.7V to 5.5V)
A
0
- Address Input
A
1
- Address Input
A
2
- Address Input
DESCRIPTION
The DS1631 digital thermometer and thermostat provides 9-, 10-, 11-, or 12-bit digital temperature
readings over a range of -55°C to +125°C. The thermometer accuracy is
±0.5°C from 0°C to +70°C with
3.0V £ V
DD
£ 5.5V. The thermostat provides custom hysteresis with user-defined trip points (T
H
and T
L
).
The thermostat output (T
OUT
) becomes active when the temperature of the device exceeds the upper
thermostat trip point (T
H
), and remains active until the temperature drops below the lower thermostat trip
point (T
L
).
The T
H
and T
L
registers and thermometer configuration settings are stored in NV EEPROM so the
DS1631 can be programmed prior to installation. Communication with the DS1631 is achieved through a
standard 2-wire serial interface.
DS1631
±0.5°C Accuracy Digital Thermometer
and Thermostat
www.maxim-ic.com
DS1631Z—8-pin SO (150mil)
DS1631U— mSOP
SCL
V
DD
A
0
A
1
A
2
GND
T
OUT
SDA
6
8
7
5
3
1
2
4
DS
1
6
31
Z
SCL
V
DD
A
0
A
1
A
2
GND
T
OUT
SDA
6
8
7
5
3
1
2
4
D
1631