temperature sensor. This accuracy is valid over its
entire operating voltage range of 2.7V to 5.5V and
the wide temperature range of -20°C to +100°C. The
DS600 can also act as a thermostat, with user-
programmable trip points. A shutdown mode enables
the DS600 to be placed in a low-power standby state.
The DS600 is available in an 8-pin µSOP package.
FEATURES
±0.5°C Accuracy (-20°C to +100°C)
±0.75°C Accuracy Over Entire Temperature
Range of(-40°C to +125°C
Requires No External Components
6.45mV/°C Output Gain with 509mV Offset at
0°C
2.7V to 5.5V Supply Voltage Range
User-Programmable Thermostat Function
Shutdown Function Puts Device into a Low-
Power Standby Mode
Exposed Pad 8-Pin µSOP Package for Quick
Thermal Response
APPLICATIONS
Cold-Junction Thermocouple Compensation
Portable Medical Equipment
Thermally Sensitive Systems that Require a High-
Accuracy Analog-Output Temperature Sensor
ORDERING INFORMATION
TYPICAL OPERATING CIRCUIT
PART
DS600U
DS600U/T&R
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
8 µSOP
8 µSOP
Tape-and-Reel
2.7V to 5.5V
DS600
V
DD
TO
TO
V
OUT
PIN CONFIGURATION
TOP VIEW
GND
CTG
SD
V
TH
TO/FROM
µC
V
DD
TO
TO
V
OUT
1
2
3
4
8
7
6
5
GND
CTG
SD
V
TH
EXPOSED PAD µSOP
DALLAS is a registered trademark of Dallas Semiconductor Corp.
MAXIM is a registered trademark of Maxim Integrated Products, Inc.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
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REV: 040804
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin (except CTG) Relative to Ground
Voltage Range on CTG Relative to Ground
Operating Temperature Range
Storage Temperature Range
Soldering Temperature (10s)
Reflow Oven Temperature
-0.5V to +6.0V
-0.5 to +0.5V
-40°C to +125°C
-55°C to +125°C
+260°C (See IPC/JEDEC J-STD-020A)
+220°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 the absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 5.5V, T
A
= -40°C to +125°C.)
PARAMETER
Supply Voltage
Thermometer Error
Output Gain
V
OUT
DC Offset
Low-Level Input Voltage (SD)
High-Level Input Voltage (SD)
SD Input Capacitance
VTH Input Capacitance
Low-Level Output Voltage
(TO,
TO
)
Supply Current
Shutdown Current
Input Current (V
TH
)
Input Resistance (V
TH
)
Leakage Current (SD)
External Load Capacitance
on V
OUT
V
OUT
Source Current
V
OUT
Sink Current
Output Impedance (V
OUT
)
Power-Up Time
Nonlinearity
Comparator Offset
Comparator Response Time
t
COMP
SYMBOL
V
DD
T
ERR
∆V/∆T
V
OS
V
IL
V
IH
C
SD
C
VTH
V
OL
I
DD
I
SD
I
TH
R
TH
I
L
C
EL
I
OSO
I
OSI
R
OUT
t
POWERUP
10
10
100
10
±0.2
±3
20
5
0.01
1
50
0.01
4mA sink current
0
0°C
-0.5
0.7 x V
DD
5
5
0.4
140
2.5
1
-20°C to +100°C
-40°C to +125°C
6.45
509
0.3 x V
DD
V
DD
+ 0.5
CONDITIONS
MIN
2.7
TYP
MAX
5.5
±0.5
±0.75
UNITS
V
°C
mV/°C
mV
V
V
pF
pF
V
µA
µA
µA
MΩ
µA
pF
µA
µA
Ω
ms
°C
mV
ms
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DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
NAME
V
DD
TO
TO
V
OUT
V
TH
SD
CTG
GND
FUNCTION
Supply Voltage.
2.7V to 5.5V
Active-High Thermostat Output.
Open-drain output transitions from low to high when the output
voltage exceeds V
TH
. In shutdown mode, (SD = 1), TO is low.
Active-Low Thermostat Output.
Open-drain output transitions from high to low when the output
voltage exceeds V
TH
. In shutdown mode, (SD = 1),
TO
is high.
Temperature Output.
Outputs a voltage that is proportional to the die temperature in degrees
centigrade. In shutdown mode, this pin goes high-Z.
Thermostat Trip Voltage.
User-selectable voltage that sets the thermostat trip-point temperature.
TO and
TO
are asserted when V
OUT
crosses this voltage. (No on-chip hysteresis is present).
Shutdown.
Power consumption and thermal sensor function are controlled through SD. This pin
functions as an active-high input pin. Driving this pin high puts the device in a low-power state and
discontinues thermal sensing.
Must be connected to GND.
Ground.
Figure 1. Block Diagram
2.7V to 5.5V
V
DD
TEMPERATURE
SENSOR
LEVEL-SHIFT
BUFFER
V
OUT
THERMOSTAT
COMPARATOR
DS600
TO
SD
CONTROL
LOGIC
TO
GND
V
TH
TEMPERATURE MEASUREMENT
The DS600 analog temperature sensor measures it own temperature and provides these measurements to the
user in the form of an output voltage, V
OUT
, that is proportional to degrees centigrade. The output voltage
characteristic is factory-calibrated for a typical output gain (∆V/∆T) of +6.45mV/°C and a DC offset (V
OS
) of 509mV.
Its operating temperature range is -40°C to +125°C, corresponding to an output voltage range of 251mV to
1315mV. (V
OUT
= Device Temperature (°C) x
∆V/∆T
+ V
OS
). The DS600 has ±0.5°C accuracy over a -20°C to
+100°C temperature range and over the full 2.7V to 5.5V voltage range. Because the output voltage is positive for
the entire temperature range, there is no need for a negative supply.
Figure 2 shows the output voltage characteristic for the DS600.
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DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
Figure 2. Output Voltage Characteristic
DS600 OUTPUT CHARACTERISTIC
1.4
1
V
OUT
(V)
0.6
0.2
-40 -20
0
20
509mV
40
60
80 100 120
TEMPERATURE (°C)
THERMOSTAT OPERATION
The DS600 can also be used as a thermostat with either an active-high (TO) or active-low (
TO
) output. To function
as a thermostat, a precise voltage reference equal to the desired threshold must be applied to the V
TH
pin. When
the temperature with the equivalent voltage value is reached (voltage on V
OUT
= voltage on V
TH
), thermostat outputs
TO and
TO
become active. Figure 3 shows an example thermostat application circuit.
Figure 3. Thermostat Application Circuit
2.7V to 5.5V
500 KΩ
DS600
V
DD
TO
TO
V
OUT
MAX6007A
GND
CTG
SD
V
TH
4 of 4
Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product.
No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
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