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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 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.
APPLICATIONS
Cold-Junction Thermocouple Compensation
Portable Medical Equipment
Thermally Sensitive Systems that Require a High-
Accuracy Analog-Output Temperature Sensor
TYPICAL OPERATING CIRCUIT
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 Exposed Pad
8 µSOP
DS600U+ -40°C to +125°C Exposed Pad
8 µSOP
DS600U/T&R -40°C to +125°C
Exposed Pad
8 µSOP
Tape-and-Reel
DS600U+/T&R -40°C to +125°C
Exposed Pad
8 µSOP
Tape-and-Reel
+ Denotes lead-free package.
PIN CONFIGURATION
DS600
±0.5 Accurate Analog-Output
Tem
p
erature Senso
r
www.maxim-ic.com
TOP VIEW
PAD
V
DD GND
TO
T
O
VOUT
V
TH
SD
CTG
2.7V to 5.5V
TO/FROM
µ
C
DS600
PAD
8-Pin μSOP Package
Exposed Pad
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
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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 -40°C to +125°C
Storage Temperature Range -55°C to +125°C
Soldering Temperature (10s) +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 thos e 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
Supply Voltage VDD 2.7 5.5 V
-20°C to +100°C ±0.5
Thermometer Error TERR -40°C to +125°C ±0.75 °C
Output Gain ΔV/ΔT 6.45 mV/°C
VOUT DC Offset VOS 0°C 509 mV
Low-Level Input Voltage (SD) VIL -0.5
0.3 x VDD V
High-Level Input Voltage (SD) VIH 0.7 x VDD VDD + 0.5 V
SD Input Capacitance CSD 5 pF
VTH Input Capacitance CVTH 5 pF
Low-Level Output Voltage
(TO, TO) VOL 4mA sink current 0 0.4 V
Supply Current IDD 140 µA
Shutdown Current ISD 2.5 µA
Input Current (VTH) ITH 0.01 1 µA
Input Resistance (VTH) RTH 5 MΩ
Leakage Current (SD) IL 0.01 1 µA
External Load Capacitance
on VOUT CEL 50 pF
VOUT Source Current IOSO 10 µA
VOUT Sink Current IOSI 10 µA
Output Impedance (VOUT) ROUT 100 Ω
Power-Up Time tPOWERUP 10 ms
Nonlinearity ±0.2 °C
Comparator Offset ±3 mV
Comparator Response Time tCOMP 20 ms
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
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PIN DESCRIPTION
PIN NAME FUNCTION
1 VDD Supply Voltage. 2.7V to 5.5V
2 TO
Active-High Thermostat Output. Open-drain output transitions from low to high when the output
voltage exceeds VTH. In shutdown mode, (SD = 1), TO is low.
3 TO A ctive-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.
4 VOUT Temperatu re Output. Outputs a voltage that is proportional to the die temperature in degrees
centigrade. In shutdown mode, this pin goes high-Z.
5 VTH Thermostat Trip Voltage. User-selectable voltage that sets the thermostat trip-point temperature.
TO and TO are asserted when VOUT crosses this voltage. (No on-chip hysteresis is present).
6 SD
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.
7 CTG Must be connected to GND.
8 GND
Ground.
PAD
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.
Figure 1. Block Diagram
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, VOUT, that is proportional to degrees centigrade. The output voltage
characteristic is factory-calibrated for a typical output gain (ΔV/ΔT) of +6.45mV/°C and a DC offset (VOS) of 509mV.
Its operating temperature range is -40°C to +125°C, corresponding to an output voltage range of 251mV to
1315mV. (VOUT = Device Temperature (°C) x ΔV/ΔT + VOS). 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.
TEMPERATURE
SENSOR V
OUT
V
TH
TO
TO
SD
V
DD
GND
CONTROL
LOGIC
LEVEL-SHIFT
BUFFER
THERMOSTAT
COMPARATOR
2.7V to 5.5V
DS600
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
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Figure 2. Output Voltage Characteristic
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 VTH pin. When
the temperature with the equivalent voltage value is reached (voltage on VOUT = voltage on VTH), thermostat outputs
TO and TO become active. Figure 3 shows an example thermostat application circuit.
Figure 3. Thermostat Application Circuit
80 0 100 -40 120 60 40 20
-20
0.2
0.6
1
1.4
DS600 OUTPUT CHARACTERISTIC
TEMPERATURE (°C)
VOUT (V)
509mV
2.7V to 5.5V
V
DD GND
TO
T
O
VOUT
V
TH
SD
CTG
500 KΩMAX6007A
DS600
PAD
DS600 ±0.5°C Accurate Analog-Output Temperature Sensor
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PACKAGE INFORMATION
Maxim/Dallas Semiconductor cannot assume responsibili ty 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
© 2007 Maxim Integrated Products • Printed USA
For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.
