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V
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GENERAL DESCRIPTION
The DS600 is a ±0.5°C accurate analog-output
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 userprogrammable 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.
APPLICATIONS
Cold-Junction Thermocouple Compensation
Portable Medical Equipment
Thermally Sensitive Systems that Require a High-
Accuracy Analog-Output Temperature Sensor
±0.5 Accurate Analog-Output
Temperature Senso
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
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
DS600U -40°C to +125°C
DS600U+ -40°C to +125°C
TYPICAL OPERATING CIRCUIT
DS600U/T&R -40°C to +125°C
2.7V to 5.5V
DS600
DD
TO
O
V
OUT
PAD
GND
CTG
SD
TH
TO/FROM
C
DS600U+/T&R -40°C to +125°C
+ Denotes lead-free package.
PIN CONFIGURATION
TOP VIEW
DS600
Exposed Pad
8 µSOP
Exposed Pad
8 µSOP
Exposed Pad
8 µSOP
Tape-and-Reel
Exposed Pad
8 µSOP
Tape-and-Reel
PAD
8-Pin μSOP Package
Exposed Pad
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: 041607
.
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin (except CTG) Relative to Ground -0.5V to +6.0V
Voltage Range on CTG Relative to Ground -0.5 to +0.5V
Operating Temperature Range
Storage Temperature Range
Soldering Temperature (10s)
-40°C to +125°C
-55°C to +125°C
+260°C (See IPC/JEDEC J-STD-020A)
Reflow Oven Temperature +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
(VCC = 2.7V to 5.5V, TA = -40°C to +125°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
Supply Voltage
Thermometer Error
Output Gain
V
DC Offset VOS 0°C 509 mV
OUT
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 (VTH)
Input Resistance (VTH)
Leakage Current (SD)
External Load Capacitance
on V
V
V
Output Impedance (V
OUT
Source Current I
OUT
Sink Current I
OUT
) R
OUT
DD
-20°C to +100°C ±0.5
T
ERR
ΔV/ΔT
V
IL
V
IH
C
SD
C
VTH
V
OL
I
DD
I
SD
I
TH
R
TH
I
L
C
EL
OSO
OSI
OUT
-40°C to +125°C ±0.75
6.45 mV/°C
4mA sink current 0 0.4 V
50 pF
10 µA
10 µA
2.7 5.5 V
°C
-0.5
0.7 x VDD
0.3 x VDD
V
+ 0.5
DD
V
V
5 pF
5 pF
140 µA
2.5 µA
0.01 1 µA
5 MΩ
0.01 1 µA
100 Ω
Power-Up Time t
POWERUP
10 ms
Nonlinearity ±0.2 °C
Comparator Offset ±3 mV
Comparator Response Time t
20 ms
COMP
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DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
PIN DESCRIPTION
PIN NAME FUNCTION
1
2 TO
3
4
5
6 SD
7 CTG Must be connected to GND.
8 GND
PAD
VDD
TO
V
OUT
VTH
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
Active-Low Thermostat Output. Open-drain output transitions from high to low when the output
voltage exceeds VTH. 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
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.
Ground.
PAD. Connect to GND or float. DO NOT CONNECT TO SUPPLY. The exposed pad is the best
way to conduct temperature into the package. Connecting PAD to a ground plane can assist in
properly measuring the temperature of the circuit board.
. In shutdown mode, (SD = 1), TO is low.
TH
crosses this voltage. (No on-chip hysteresis is present).
OUT
Figure 1. Block Diagram
2.7V to 5.5V
V
TEMPERATURE
SENSOR
DS600
LEVEL-SHIFT
BUFFER
V
THERMOSTAT
COMPARATOR
SD
CONTROL
TO
TO
GND
V
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
characteristic is factory-calibrated for a typical output gain (ΔV/ΔT) of +6.45mV/°C and a DC offset (V
Its operating temperature range is -40°C to +125°C, corresponding to an output voltage range of 251mV to
1315mV. (V
= Device Temperature (°C) x ΔV/ΔT + VOS). The DS600 has ±0.5°C accuracy over a -20°C to
OUT
+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.
, that is proportional to degrees centigrade. The output voltage
OUT
) of 509mV.
OS
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DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
V
T
V
Figure 2. Output Voltage Characteristic
DS600 OUTPUT CHARACTERISTIC
1.4
1
(V)
OUT
V
0.6
509mV
0.2
-20
TEMPERATURE (°C)
80 0 100 -40 120 60 40 20
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
the temperature with the equivalent voltage value is reached (voltage on V
= voltage on VTH), thermostat outputs
OUT
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
PAD
DD GND
TO
CTG
O
V
OUT
MAX6007A
SD
TH
pin. When
TH
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DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
PACKAGE INFORMATION
For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.
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 D rive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products • Printed USA
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