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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6676 Datasheet

Low-Voltage / 1.8kHz PWM Output Temperature Sensors

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MAX6676 pdf
MAX6676/MAX6677
EVALUATION KIT AVAILABLE
Low-Voltage, 1.8kHz PWM
Output Temperature Sensors
General Description
The MAX6676/MAX6677 are high-accuracy, low-pow-
er temperature sensors with a single-wire output. The
MAX6676/MAX6677 convert the ambient temperature
into a ratiometric PWM output with temperature infor-
mation contained in the duty cycle of the output square
wave. The MAX6676 has an open-drain output and the
MAX6677 has a push-pull output.
The MAX6676/MAX6677 are specified for operation with
power-supply voltages from 1.8V to 3.6V, or from 3.6V
to 5.5V (MAX6676 only). The typical unloaded supply
current is 80µA. All 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 1.8kHz (±20%) at +25°C. The
output format is decoded as follows:
Temperature (°C) = 398.15 5 (t1/t2) - 273.15
Where t1 is fixed with a typical value of 0.24ms and t2 is
modulated by the temperature. The MAX6676/MAX6677
operate from -40°C to +125°C and are available in
space-saving 6-pin SOT23 packages.
Applications
● Process Control
● Industrial
● HVAC and Environmental Control
● Portable Devices
● µP and µC Temperature Monitoring
● Isolated Temperature Sensing
Features
● Simple Single-Wire, 1.8kHz PWM Output
● Operates Down to 1.8V
● High Accuracy
±1.5°C at TA = +25°C
±3.0°C at TA = 0°C to +85°C
● Operates from -40°C to +125°C
● Low 80µA Typical Current Consumption
● Small 6-Pin SOT23 Package
Ordering Information
PART
MAX6676AUT3-T
MAX6676AUT5-T
MAX6677AUT3-T
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
6 SOT23
6 SOT23
6 SOT23
Selector Guide
PART
OUTPUT
TYPE
MAX6676AUT3
MAX6676AUT5
MAX6677AUT3
Open drain
Open drain
Push-pull
SUPPLY
VOLTAGE
RANGE (V)
1.8 to 3.6
3.6 to 5.5
1.8 to 3.6
TOP
MARK
ABBF
ABBG
ABBH
Typical Operating Circuit
VCC
0.1µF
VCC
DOUT
MAX6676
GND
5.1k*
t2
t1
INPUT TO
TIMER/
COUNTER
µC
*REQUIRED ONLY FOR MAX6676.
Pin Configuration
TOP VIEW
DOUT 1
GND 2
MAX6676
MAX6677
6 GND
5 GND
VCC 3
4 GND
SOT23
19-2660; Rev 2; 4/15


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6676 Datasheet

Low-Voltage / 1.8kHz PWM Output Temperature Sensors

No Preview Available !

MAX6676 pdf
MAX6676/MAX6677
Low-Voltage, 1.8kHz PWM
Output Temperature Sensors
Absolute Maximum Ratings
(Voltages Referenced to GND)
VCC........................................................................-0.3V to +6.0V
DOUT (MAX6676).................................................-0.3V to +6.0V
DOUT (MAX6677)..................................... -0.3V to (VCC + 0.3V)
DOUT Current..................................................... -1mA to +50mA
ESD Protection (DOUT, Human Body Model)..................±2000V
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)........695.7mW
Operating Temperature Range.......................... -40°C to +125°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 = 1.8V to 3.6V (MAX6676AUT3/MAX6677AUT3), VCC = 3.6V to 5.5V (MAX6676AUT5), TA = -40°C to +125°C, unless otherwise
noted. Typical values are at VCC = 3.0V (MAX6676AUT3/MAX6677AUT3), VCC = 5.0V (MAX6676AUT5), TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
Supply Voltage Range
MAX6676AUT3/MAX6677AUT3
VCC
MAX6676AUT5
1.8
3.6
Supply Current
Temperature Error
Nominal t1 Pulse Width
Output High Voltage
ICC RL = ∞
TA = +25°C
TA = 0°C to +85°C
TA = -20°C to +100°C
TA = -40°C to +125°C
VOH IOH = 800µA, MAX6677
-1.5
-3.0
-4.2
-5.5
VCC -
0.3
Output Leakage Current
Output Low Voltage
Fall Time
Rise Time
Digital Output Capacitance
Power-Supply Rejection Ratio
VOL
tF
tR
COUT
PSRR
VOUT = VCC
IOL = 3mA
CL = 100pF, RL = 10kΩ
MAX6676, CL = 15pF, RL = 10kW
MAX6677, CL = 100pF, RL = 10kW
VCC = 1.8V - 3.6V
-1.2
Note 1: Parts are tested at +25°C. Specifications are guaranteed by design over temperature.
TYP
80
240
0.1
20
300
30
15
+0.4
MAX
3.6
5.5
200
+1.5
+3.0
+4.2
+5.5
UNITS
V
µA
°C
µs
V
µA
0.3 V
ns
ns
+1.2
pF
°C/V
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX6676
Description Low-Voltage / 1.8kHz PWM Output Temperature Sensors
Maker Maxim
Total Page 7 Pages
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