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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6672 Datasheet

PWM Output Temperature Sensors

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MAX6672 pdf
19-2458; Rev 0; 10/02
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PWM Output Temperature Sensors
in SC70 Packages
General Description
The MAX6672/MAX6673 are low-current temperature
sensors with a single-wire output. These temperature
sensors convert the ambient temperature into a 1.4kHz
PWM output, which contains the temperature informa-
tion in its duty cycle. The MAX6672 has an open-drain
output and the MAX6673 has a push-pull output.
The MAX6672/MAX6673 operate from 2.4V to 5.5V with
a maximum supply current of 150µA. Both devices fea-
ture a single-wire output that minimizes the number of
pins necessary to interface with a microprocessor.
The MAX6672/MAX6673 are available in 5-pin SC70
packages.
Features
o Simple Single-Wire PWM Output
o Tiny SC70 Package
o Low 60µA (typ) Supply Current Consumption
o 1.4kHz Nominal Frequency
o Choice of Outputs
Open Drain (MAX6672)
Push-Pull (MAX6673)
o 2.4V to 5.5V Supply Range
Applications
Industrial and Process Control
HVAC
Automotive
Environmental Control
Isolated Temperature Sensing
Ordering Information
PART
TEMP RANGE
MAX6672AXK-T -40°C to +125°C
MAX6673AXK-T -40°C to +125°C
PIN-
PACKAGE
5 SC70-5
5 SC70-5
TOP
MARK
ACQ
ACR
Typical Application Circuit
Pin Configuration
0.1µF
VCC
MAX6672
MAX6673
GND
µC
GPIO TO CONTROL
* SHUTDOWN
INPUT TO TIMER/
COUNTER
* PULLUP RESISTOR REQUIRED ONLY FOR THE MAX6672.
TOP VIEW
DOUT 1
5 VCC
MAX6672
N.C. 2 MAX6673
GND 3
4 GND
SC70
________________________________________________________________ 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

MAX6672 Datasheet

PWM Output Temperature Sensors

No Preview Available !

MAX6672 pdf
PWM Output Temperature Sensors
in SC70 Packages
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to GND) ................................. -0.3V to +6V
DOUT to GND (MAX6672)........................................-0.3V to +6V
DOUT to GND (MAX6673)..........................-0.3V to (VCC + 0.3V)
DOUT Short to GND ...................................................Continuous
ESD Protection (Human Body Model) ............................ ±2000V
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C). ............200mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
SC70 Package
Vapor Phase (60s) ...................................................... +215°C
Infrared (15s). ............................................................. +220°C
Lead Temperature (soldering, 10s) ................................ +300°C
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 = 2.4V to 5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values specified at +25°C and VCC of 3.3V.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Temperature Error
(Note 2)
Nominal t1 Pulse Width
Output Low Voltage
Output High Voltage
Fall Time
Rise Time
VCC = 3.3V
TA = +25°C to +100°C
TA = 0°C to +125°C
TA = -20°C to +125°C
TA = -40°C to -20°C
VOL
VOH
tFALL
tRISE
ISINK = 3mA
ISOURCE = 800µA (MAX6673)
CLOAD = 100pF
CLOAD = 100pF (MAX6673)
-3
-4
-5
±3
280
VCC - 0.5
14
96
+3
+4
+5
0.4
°C
µs
V
V
ns
ns
DOUT Open-Drain Leakage
Current
VDOUT = 6V (MAX6672)
0.1 µA
Output Capacitance
2.5 pF
Power-Supply Rejection Ratio
Supply Current
PSRR
ICC
2.4V to 5.5V, TA = -25°C to +125°C
2.4V to 3.6V
3.6V to 5.5V
0.3 0.8 °C/V
60 100
µA
70 150
Note 1: All specifications are 100% tested at TA = +25°C. Specification limits over temperature (TA = -40°C to +125°C) are guaranteed
by design, not production tested.
Note 2: Temperature = -200 (0.85 - T1/T2)3 + (425 T1/T2) - 273. T1 is the low time period. T2 is the high time period (Figure 1).
2 _______________________________________________________________________________________


Part Number MAX6672
Description PWM Output Temperature Sensors
Maker Maxim Integrated Products
Total Page 6 Pages
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