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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6662 Datasheet

12-Bit + Sign Temperature Sensor

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MAX6662 pdf
19-2121; Rev 0; 7/01
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
General Description
The MAX6662 is a 12-bit + sign temperature sensor
combined with a programmable overtemperature alarm
and a 3-wire (SPI™-compatible) serial interface in a sin-
gle package. It converts its die temperature into digital
values using an internal analog-to-digital converter
(ADC). The temperature data is stored in a temperature
register as a 13-bit word, which allows 0.0625°C resolu-
tion. The temperature data is readable at any time
through the serial interface. The operating temperature
range is -55°C to +150°C.
The MAX6662 provides two programmable watchdog
interrupt outputs. ALERT is used for lower temperature
warning functions, while OT is used for higher tempera-
ture-critical functions, such as power-supply shutdown.
The MAX6662 features a shutdown mode that saves
power by disabling everything except the serial inter-
face. The temperature sensor is available in an 8-pin SO
package.
Features
12-Bit + Sign, 0.0625°C Resolution
Accuracy
±1°C max (+30°C to +50°C)
±1.6°C max (0°C to +70°C)
±2.5°C max (-20°C to +85°C)
±2.5 typ (+150°C)
Extended Temperature Measurement Range
-55°C to +150°C
Low Average Supply Current, 125µA (typ)
Shutdown Mode to Minimize Power Consumption
in Portable Applications
Two Programmable Temperature Fault Outputs
Switchable Fault Queue to Eliminate False
Tripping in Noisy Environments
HVAC
Refrigeration
Automotive
Test Equipment
Applications
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Typical Operating Circuit
VCC = +3V TO +5.5V
HEAT
SOURCES
0.1µF
VCC
MAX6662
10k
OT
ALERT
SIO
SCLK
CS
10k
PART
MAX6662MSA
Ordering Information
TEMP. RANGE
-55°C to +150°C
PIN-PACKAGE
8 SO
TOP VIEW
Pin Configuration
SCLK 1
CS 2
SIO 3
GND 4
MAX6662
8 VCC
7 NC
6 ALERT
5 OT
SO
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6662 Datasheet

12-Bit + Sign Temperature Sensor

No Preview Available !

MAX6662 pdf
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
ABSOLUTE MAXIMUM RATINGS
All Voltages Are Referenced to GND
VCC ...........................................................................-0.3V to +6V
ALERT, OT................................................................-0.3V to +6V
SIO, SCLK, CS............................................-0.3V to (VCC + 0.3V)
SIO Current .......................................................-10mA to +50mA
Continuous Current into Any Pin (except NC)….................10mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
Operating Temperature Range (Note 1) ..........-55°C to +150°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: The MAX6662 is not recommended to operate above +125°C for an extended period of time.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +3V to +5.5V, TA = -55°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = +3.3V.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
TEMPERATURE TO DIGITAL-CONVERTER CHARACTERISTICS
+30°C TA +50°C, VCC = +3.3V
0°C TA +70°C, VCC = +3.3V
Accuracy
-20°C TA +85°C, VCC = +3.3V
-40°C TA +100°C, VCC = +3.3V
-55°C TA +125°C, VCC = +3.3V
TA +150°C, VCC = +3.3V
Power-Supply Rejection Ratio
PSRR
Resolution
Supply Voltage Range
VCC
Average Operating Current
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Peak Operating Current (Note 2)
VCC = +5.5V
VCC = +3.0V
VCC = +5.5V
VCC = +3.0V
-1.0 ±0.4 +1.0
-1.6 ±0.7 +1.6
-2.5 ±1.0 +2.5
-3.0 ±1.2 +3.0
-4.0 ±1.5 +4.0
±2.5
0.2 0.5
0.0625
3.0 5.5
150
125
300 600
300 500
Shutdown Supply Current
Power-On-Reset Threshold
Power-On-Reset Threshold
Hysteresis
VPOR
VCC = +5.5V
VCC = +3.0V
8 22
4 15
2.0 2.5
90
Conversion Time
tCONV
Temperature Update Frequency
SERIAL INTERFACE (SIO, SCLK, CS, ALERT, OT)
Input Low Voltage
VIL
Input High Voltage
VIH
Input/Output Leakage Current
ILEAK VIN = GND or VCC
Input Capacitance
Cin
Output Low Sink Current
IOL ALERT, OT, VOL = 0.6V
Output High Voltage
VOH ISIO = 1.6mA source
Output Low Voltage
VOL ISIO = 1.6mA sink
0.25
2
0.7 VCC
-5
3
VCC - 0.4
5
0.8
+5
0.4
UNITS
°C
°C/V
°C
V
µA
µA
µA
V
mV
s
Hz
V
V
µA
pF
mA
V
V
2 _______________________________________________________________________________________


Part Number MAX6662
Description 12-Bit + Sign Temperature Sensor
Maker Maxim Integrated Products
Total Page 9 Pages
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