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Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23 Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Tel: 781.329.4700 © 2007–2012 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com

FEATURES

±0.5°C (typical) threshold accuracy Factory-set trip points from −45°C to +15°C in 10°C increments +35°C to +115°C in 10°C increments No external components required Maximum temperature of 125°C Open-drain output (ADT6501/ADT6503) Push-pull output (ADT6502/ADT6504) Pin-selectable hysteresis of 2°C and 10°C Supply current of 30 µA (typical) Space-saving, 5-lead SOT-23 package

APPLICATIONS

Figure 1. GENERAL DESCRIPTION The ADT6501/ADT6502/ADT6503/ADT6504 are trip point temperature switches available in a 5-lead SOT-23 package. Each part contains an internal band gap temperature sensor for local temperature sensing. When the temperature crosses the trip point setting, the logic output is activated. The ADT6501/ ADT6503 logic output is active low and open-drain. The ADT6502/ADT6504 logic output is active high and push-pull. The temperature is digitized to a resolution of 0.125°C (11-bit). The factory trip point settings are 10°C apart starting from −45°C to +15°C for the cold threshold models and from +35°C to +115°C for the hot threshold models. These devices require no external components and typically consume 30 μA supply current. Hysteresis is pin-selectable at 2°C and 10°C. The temperature switch is specified to operate over the supply range of 2.7 V to 5.5 V . The ADT6501 and ADT6502 are used for monitoring temperatures from +35°C to +115°C only. Therefore, the logic output pin becomes active when the temperature goes higher than the selected trip point temperature. The ADT6503 and ADT6504 are used for monitoring tempera- tures from −45°C to +15°C only. Therefore, the logic output pin becomes active when the temperature goes lower than the selected trip point temperature. PRODUCT HIGHLIGHTS 1. Σ-Δ based temperature measurement gives high accuracy and noise immunity. 2. Wide operating temperature range from −55°C to +125°C. 3. ±0.5°C typical accuracy from −45°C to +115°C. 4. Factory threshold settings from −45°C to +115°C in 10°C increments. 5. Supply voltage is 2.7 V to 5.5 V . 6. Supply current of 30 μA. 7. Space-saving, 5-lead SOT-23 package. 8. Pin-selectable temperature hysteresis of 2°C or 10°C. 9. Temperature resolution of 0.125°C. 06096-001 2ºC/10ºC VCC GND GND HYST TOVER5 FACTORY PRESET TRIP POINT REGISTER ADT6501 COMPARATOR Σ-Δ TEMPERATURE-TO- DIGITAL CONVERTER

ADT6501/ADT6502/ADT6503/ADT6504 Data Sheet Rev. B | Page 2 of 16 TABLE OF CONTENTS

REVISION HISTORY

9/12—Rev. A to Rev. B 1/08—Rev. 0 to Rev. A 07—Revision 0: Initial Version

Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 Rev. B | Page 3 of 16 SPECIFICATIONS TA = −55°C to +125°C, VCC = 2.7 V to 5.5 V, open-drain RPULL-UP = 10 kΩ, unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments TEMPERATURE SENSOR AND ADC Threshold Accuracy ±0.5 ±6 °C TA = −45°C to −25°C ±0.5 ±4 °C TA = 35°C to 65°C ±0.5 ±6 °C TA = 75°C to 115°C ADC Resolution 11 Bits Temperature Conversion Time 30 ms Time necessary to complete a conversion Update Rate 600 ms Conversion started every 600 ms Temperature Threshold Hysteresis 2 °C HYST pin = 0 V 10 °C HYST pin = VCC DIGITAL INPUT (HYST) Input Low Voltage, VIL 0.2 × VCC V Input High Voltage, VIH 0.8 × VCC V DIGITAL OUTPUT (OPEN-DRAIN) Output High Current, IOH 10 nA Leakage current, VCC = 2.7 V and VOH = 5.5 V Output Low Voltage, VOL 0.3 V IOL = 1.2 mA, VCC = 2.7 V 0.4 V IOL = 3.2 mA, VCC = 4.5 V Output Capacitance, COUT 1 10 pF RPULL-UP = 10 kΩ DIGITAL OUTPUT (PUSH-PULL) Output Low Voltage, VOL 0.3 V IOL = 1.2 mA, VCC = 2.7 V 0.4 V IOL = 3.2 mA, VCC = 4.5 V Output High Voltage, VOH 0.8 × VCC V ISOURCE = 500 µA, VCC = 2.7 V VCC − 1.5 V ISOURCE = 800 µA, VCC = 4.5 V Output Capacitance, COUT 1 10 pF POWER REQUIREMENTS Supply Voltage 2.7 5.5 V Supply Current 30 55 µA 1 Guaranteed by design and characterization.

worst case θJA. Refer to Figure 2 for a plot of maximum power dissipation vs.

3 Junction-to-case resistance is applicable to components featuring a

Figure 2. SOT-23 Maximum Power Dissipation vs. Temperature

(maximum) from −45°C to +115°C. completed, which typically takes 30 ms. of effective accuracy in an extremely compact circuit. the comparator output in response to input voltage changes. improving overall noise performance and increasing accuracy. available temperature threshold ranges. Table 4. Factory-Set Temperature Threshold Ranges have to go as low as 35°C before the output deactivates. the output trip pin of each generic model.

ADT6501/ADT6502/ADT6503/ADT6504 Data Sheet Rev. B | Page 10 of 16

APPLICATION INFORMATION

The time required for a temperature sensor to settle to a specified accuracy is a function of the sensor’s thermal mass and the thermal conductivity between the sensor and the object being sensed. Thermal mass is often considered equivalent to capacitance. Thermal conductivity is commonly specified using the symbol Q and can be thought of as thermal resistance. It is commonly specified in units of degrees per watt of power transferred across the thermal joint. Thus, the time required for the ADT650x to settle to the desired accuracy is dependent on the characteristics of the SOT-23 package, the thermal contact established in that particular application, and the equivalent power of the heat source. In most applications, the settling time is best determined empirically. SELF-HEATING EFFECTS The temperature measurement accuracy of the ADT6501/ ADT6502/ADT6503/ADT6504 can be degraded in some applications due to self-heating. Errors can be introduced from the quiescent dissipation and power dissipated when converting. The magnitude of these temperature errors depends on the thermal conductivity of the ADT650x package, the mounting technique, and the effects of airflow. At 25°C, static dissipation in the ADT650x is typically 99 µW operating at 3.3 V . In the 5-lead SOT-23 package mounted in free air, this accounts for a temperature increase due to self-heating of ΔT = P DISS × θJA = 99 µW × 240°C/W = 0.024°C It is recommended that current dissipated through the device be kept to a minimum because it has a proportional effect on the temperature error. SUPPLY DECOUPLING The ADT6501/ADT6502/ADT6503/ADT6504 should be decoupled with a 0.1 µF ceramic capacitor between VCC and GND. This is particularly important when the ADT650x are mounted remotely from the power supply. Precision analog products such as the ADT650x require well filtered power sources. Because the ADT650x operate from a single supply, it may seem convenient to tap into the digital logic power supply. Unfortunately, the logic supply is often a switch-mode design, which generates noise in the 20 kHz to 1 MHz range. In addition, fast logic gates can generate glitches that are hundreds of mV in amplitude due to wiring resistance and inductance. If possible, the ADT650x should be powered directly from the system power supply. This arrangement, shown in Figure 19, isolates the analog section from the logic switching transients. Even if a separate power supply trace is not available, generous supply bypassing reduces supply line induced errors. Local supply bypassing consisting of a 0.1 µF ceramic capacitor is advisable to achieve the temperature accuracy specifications. This decoupling capacitor must be placed as close as possible to the ADT650x V CC pin. Figure 19. Separate Traces Used to Reduce Power Supply Noise monitoring the thermal environment within electronic equipment. exact thermal conditions that affect nearby integrated circuits. and the GND of the heat source be reduced as much as possible. beneath the microprocessor’s pin grid array (PGA) package. The ADT650x requires no external characterization.

Figure 23. Fail-Safe Temperature Monitor

Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 Rev. B | Page 13 of 16 OUTLINE DIMENSIONS Figure 24. 5-Lead Small Outline Transistor Package [SOT-23]

Description

ADT6501SRJZP035RL7 35°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1U ADT6501SRJZP045RL7 45°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1V ADT6501SRJZP055RL7 55°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T0B ADT6501SRJZP065RL7 65°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1W ADT6501SRJZP075RL7 75°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1X ADT6501SRJZP085RL7 85°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T0W ADT6501SRJZP085-RL 85°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 10,000 T0W ADT6501SRJZP095RL7 95°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1Y ADT6501SRJZP105RL7 105°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T15 ADT6501SRJZP105-RL 105°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 10,000 T15 ADT6501SRJZP115RL7 115°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T1Z ADT6502SRJZP035RL7 35°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T25 ADT6502SRJZP045RL7 45°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T26 ADT6502SRJZP055RL7 55°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T27 ADT6502SRJZP065RL7 65°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T28 ADT6502SRJZP075RL7 75°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T17 ADT6502SRJZP085RL7 85°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T29 ADT6502SRJZP095RL7 95°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2B ADT6502SRJZP105RL7 105°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2C ADT6502SRJZP115RL7 115°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2D ADT6503SRJZN045RL7 −45°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2E ADT6503SRJZN035RL7 −35°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2F ADT6503SRJZN025RL7 −25°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T19 ADT6503SRJZN015RL7 −15°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2J ADT6503SRJZN005RL7 −5°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2M COMPLIANT TO JEDEC STANDARDS MO-178-AA 10° SEATING PLANE 1.90 BSC

0.95 BSC

0.60 BSC 1 2 3 3.00 2.90 2.80 3.00 2.80 2.60 1.70 1.60 1.50 1.30 1.15 0.90

0.15 MAX

0.05 MIN

1.45 MAX

0.95 MIN

0.20 MAX

0.08 MIN

0.50 MAX

0.35 MIN

0.55 0.45 0.35 11-01-2010-A

ADT6501/ADT6502/ADT6503/ADT6504 Data Sheet Rev. B | Page 14 of 16 Model1 Threshold Temperature Accuracy @ Threshold Temperature Temperature Range Package ADT6503SRJZP005RL7 +5°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2N ADT6503SRJZP015RL7 +15°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2P ADT6504SRJZN045RL7 −45°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2K ADT6504SRJZN035RL7 −35°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2L ADT6504SRJZN025RL7 −25°C ±6°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2Q ADT6504SRJZN015RL7 −15°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2R ADT6504SRJZN005RL7 −5°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2T ADT6504SRJZP005RL7 +5°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2H ADT6504SRJZP015RL7 +15°C ±4°C −55°C to +125°C 5-Lead SOT-23 RJ-5 3,000 T2U 1 Z = RoHS Compliant Part.

Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 Rev. B | Page 15 of 16 NOTES

ADT6501/ADT6502/ADT6503/ADT6504 Data Sheet Rev. B | Page 16 of 16 NOTES ©2007–2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06096-0-10/12(B)