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MAX6666ATT+T

P1-P3P4-P6P7-P7
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 temper-
ature information contained in the duty cycle of the out-
put 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 t
1
) / t
2
Where t
1
is fixed with a typical value of 10ms and t
2
is
modulated by the temperature (Figure 1). The MAX6666/
MAX6667 operate from -40°C to +125°C and are available
in space-saving SOT23 packages.
Applications
Process Control
Industrial
HVAC and Environmental Control
Automotive
µP and µC Temperature Monitoring
Features
o Simple Single-Wire PWM Output
o ±1.0°C Accuracy at +25°C
o High Accuracy
±1°C at T
A
= +30°C
±2.5°C at T
A
= +10°C to +50°C
o Operate Up to +125°C
o Low 200µA Typical Current Consumption
o Small SOT23 package
MAX6666/MAX6667
High-Accuracy PWM Output Temperature
Sensors
________________________________________________________________
Maxim Integrated Products
1
Pin Configuration
Ordering Information
V
CC
+3.3V
GND
DOUT
t
1
t
2
µC
INPUT TO
TIMER/COUNTER
MAX6666
MAX6667
Typical Operating Circuit
19-2138; Rev 3; 8/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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
V
CC
I.C.GND
1
+
5
6
I.C.
I.C.
D
OUT
MAX6666
MAX6667
SOT23
2
34
TOP VIEW
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX6666/MAX6667
High-Accuracy PWM Output Temperature
Sensors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°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.
(Voltages Referenced to GND)
V
CC
........................................................................-0.3V to +6.0V
D
OUT
MAX6666................................................-0.3V to (V
CC
+ 0.3V)
MAX6667 ..........................................................-0.3V to + 6.0V
D
OUT
Current ......................................................-1mA to +50mA
Continuous Current into Any Other Terminal....................±20mA
Continuous Power Dissipation (T
A
= +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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
CC
3.0 5.5 V
Supply Current I
CC
V
CC
= +3.0V to +5.5V 200 500 µA
T
A
= +30°C -1 +1
T
A
= +10°C to +50°C -2.5 +2.5
T
A
= 0°C to +100°C -3.8 +3.8
T
A
= -25°C to +125°C -4.8 +4.8
Temperature Error V
CC
= +3.3V
T
A
= -40°C, V
CC
= +3.3V -6 +6
°C
Nominal t
1
Pulse Width 10 ms
MAX6666 Output High Voltage I
OH
= 800µA V
C C
- 0.4 V
MAX6666 Output Low Voltage I
OL
= 800µA 0.4 V
MAX6666 Fall Time C
L
= 100pF, R
L
= ∞ 80 ns
MAX6666 Rise Time C
L
= 100pF, R
L
= ∞ 80 ns
I
SINK
= 1.6mA 0.4
MAX6667 Output Low Voltage
I
SINK
= 5.0mA 1.2
V
MAX6667 Fall Time C
L
= 100pF, R
L
= 10kΩ 40 ns
MAX6667 Output Capacitance C
L
= 0 15 pF
MAX6667 Output Leakage <0.1 µA
Power-Supply Rejection Ratio PSRR V
CC
= +3.0V to +5.5V 0.3 1.0 °C/V
MAX6666/MAX6667
High-Accuracy PWM Output Temperature
Sensors
_______________________________________________________________________________________
3
0
10
30
20
40
50
-40 10-15 356085110
OUTPUT FREQUENCY vs. TEMPERATURE
MAX6666/7 toc01
TEMPERATURE (°C)
OUTPUT FREQUENCY (Hz)
20
25
35
30
40
45
3.0 4.03.5 4.5 5.0 5.5
OUTPUT FREQUENCY vs. SUPPLY VOLTAGE
MAX6666/7 toc02
SUPPLY VOLTAGE (V)
OUTPUT FREQUENCY (Hz)
TEMP = +125°C
TEMP = +25°C
TEMP = -40°C
9
19
14
29
24
39
34
-40 20 50-10 80 110 140
T
1
AND T
2
TIMES
vs. TEMPERATURE
MAX6666/7 toc03
TEMPERATURE (°C)
TIME (ms)
TWO TYPICAL PARTS
T
2
T
1
-3
-1
-2
1
0
2
3
OUTPUT ACCURACY
vs. TEMPERATURE
MAX6666/7 toc04
TEMPERATURE (°C)
OUTPUT ACCURACY (°C)
-40 20 50-10 80 110
SUPPLY CURRENT
vs. TEMPERATURE
MAX6666/7 toc05
SUPPLY CURRENT (µA)
-55 5 35-25
65
95 125 155
TEMPERATURE (°C)
210
100
110
120
130
140
160
170
180
190
200
150
V
CC
= +5.5V
V
CC
= +3.3V
140
144
142
150
148
146
156
154
152
158
3.0 4.03.5 4.5 5.0 5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6666/7 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
0
0.15
0.10
0.05
0.25
0.20
0.45
0.40
0.35
0.30
0.50
-40 -15 10 35 60 85 110
POWER-SUPPLY REJECTION RATIO
vs. TEMPERATURE
MAX6666/7 toc07
TEMPERATURE (°C)
PSRR (°C/V)
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX6666/7 toc08
FREQUENCY (Hz)
CHANGE IN TEMPERATURE (°C)
1.0
-1.0
-0.5
0
0.5
0.01 10 100 1k0.1 1 10k
V
AC
= 100mVp-p
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P7

MAX6666ATT+T

Mfr. #:
Buy MAX6666ATT+T
Manufacturer:
Maxim Integrated
Description:
IC TEMP SENSOR PWM 6TDFN
Lifecycle:
New from this manufacturer.
Delivery:
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