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MAX6666 Datasheet

(MAX6666 / MAX6667) High-Accuracy PWM Output Temperature Sensors

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MAX6666/MAX6667
High-Accuracy PWM Output Temperature Sensors
General Description
The MAX6666/MAX6667 are high-accuracy, low-cost,
low-power temperature sensors with a single-wire
output. The MAX6666/MAX6667 convert the ambient
temperature into a ratiometric PWM output with tempera-
ture information contained in the duty cycle of the output
square wave. The MAX6666 has a push-pull output and
the MAX6667 has an open-drain output.
The MAX6666/MAX6667 operate at supply voltages from
+3V to +5.5V. The typical unloaded supply current at 5.0V
is 200µA. Both devices feature a single-wire output that
minimizes the number of pins necessary to interface with
a microprocessor (µP). The output is a square wave with
a nominal frequency of 35Hz (±20%) at +25°C. The output
format is decoded as follows:
Temperature (°C) = 235 - (400 x t1)/t2
Where t1 is fixed with a typical value of 10ms and t2 is
modulated by the temperature (Figure 1). The MAX6666/
MAX6667 operate from -40°C to +125°C and are avail-
able in space-saving SOT23 packages.
Applications
● Process Control
● Industrial
● HVAC and Environmental Control
● µP and µC Temperature Monitoring
Features
● Simple Single-Wire PWM Output
● ±1.0°C Accuracy at +25°C
● High Accuracy
±1°C at TA = +30°C
±2.5°C at TA = +10°C to +50°C
● Operate Up to +125°C
● Low 200µA Typical Current Consumption
● Small SOT23 package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX6666AUT+T -40°C to +125°C 6 SOT23
AATF
MAX6667AUT+T -40°C to +125°C 6 SOT23
AATG
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
+3.3V
VCC
MAX6666
MAX6667
DOUT
GND
t1
t2
µC
INPUT TO
TIMER/COUNTER
Pin Configuration
TOP VIEW
+
DOUT 1
VCC 2
MAX6666
MAX6667
6 I.C.
5 I.C.
GND 3
4 I.C.
SOT23
19-2138; Rev 4; 4/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6666 Datasheet

(MAX6666 / MAX6667) High-Accuracy PWM Output Temperature Sensors

No Preview Available !

MAX6666/MAX6667
High-Accuracy PWM Output Temperature Sensors
Absolute Maximum Ratings
(Voltages Referenced to GND)
VCC........................................................................-0.3V to +6.0V
DOUT
MAX6666.............................................. .-0.3V to (VCC + 0.3V)
MAX6667..........................................................-0.3V to + 6.0V
DOUT Current..................................................... .-1mA to +50mA
Continuous Current into Any Other Terminal....................±20mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 7.4mW/°C above +70°C)...........595mW
Operating Temperature Range.......................... -40°C to +150°C
Storage Temperature Range............................. -65°C to +150°C
Junction Temperature.......................................................+150°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 = +3.0V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C.)
PARAMETER
Supply Voltage Range
Supply Current
Temperature Error
Nominal t1 Pulse Width
MAX6666 Output High Voltage
MAX6666 Output Low Voltage
MAX6666 Fall Time
MAX6666 Rise Time
MAX6667 Output Low Voltage
MAX6667 Fall Time
MAX6667 Output Capacitance
MAX6667 Output Leakage
Power-Supply Rejection Ratio
SYMBOL
CONDITIONS
MIN TYP
VCC
ICC
VCC = +3.0V to +5.5V
TA = +30°C
TA = +10°C to +50°C
VCC = +3.3V
TA = 0°C to +100°C
TA = -25°C to +125°C
TA = -40°C, VCC = +3.3V
3.0
-1
-2.5
-3.8
-4.8
-6
200
10
IOH = 800µA
IOL = 800µA
CL = 100pF, RL = ∞
CL = 100pF, RL = ∞
ISINK = 1.6mA
ISINK = 5.0mA
CL = 100pF, RL = 10kW
CL = 0
VCC - 0.4
80
80
40
15
<0.1
PSRR VCC = +3.0V to +5.5V
0.3
MAX
5.5
500
+1
+2.5
+3.8
+4.8
+6
0.4
0.4
1.2
1.0
UNITS
V
µA
°C
ms
V
V
ns
ns
V
ns
pF
µA
°C/V
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX6666
Description (MAX6666 / MAX6667) High-Accuracy PWM Output Temperature Sensors
Maker Maxim Integrated Products
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MAX6666 Datasheet PDF






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