19-3007; Rev 1; 2/11 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 The MAX6516–MAX6519 low-cost, fully integrated temperature switches assert a logic signal when their die temperature crosses a factory-programmed threshold. Operating from a 2.7V to 5.5V supply, these devices feature a fixed voltage reference, an analog temperature sensor, and a comparator. They are available with factory-trimmed temperature trip thresholds from -45°C to +115°C in 10°C increments, and are accurate to ±0.5°C (typ). These devices require no external components and typically consume 22µA of supply current. Hysteresis is pin selectable at 2°C or 10°C. The MAX6516–MAX6519 are offered with hot-temperature thresholds (+35°C to +115°C), asserting when the temperature is above the threshold, or with cold-temperature thresholds (-45°C to +15°C), asserting when the temperature is below the threshold. These devices provide an analog output proportional to temperature and are stable with any capacitive load up to 1000pF. The MAX6516–MAX6519 can be used over a range of -35°C to +125°C with a supply voltage of 2.7V to 5.5V. For applications sensing temperature down to -45°C, a supply voltage above 4.5V is required. The MAX6516 and MAX6518 have an active-high, push-pull output. The MAX6517 and MAX6519 have an active-low, open-drain output. These devices are available in a space-saving 5-pin SOT23 package and operate over the -55°C to +125°C temperature range. Applications Fan Control Test Equipment Over/Undertemperature Protection Temperature Control Notebook, Desktop PCs Temperature Alarms RAID Features ♦ High Accuracy ±1.5°C (max) Over -15°C to +65°C Temperature Range ♦ Low Power Consumption—22µA Typical Current ♦ Factory-Programmed Thresholds from -45°C to +115°C in 10°C Increments ♦ Analog Output to Allow Board-Level Testing ♦ Open-Drain or Push-Pull Outputs ♦ Pin-Selectable 2°C or 10°C Hysteresis Ordering Information PART TEMP RANGE PIN-PACKAGE MAX6516UK_ _ _ _+T -55°C to +125°C 5 SOT23 MAX6517UK_ _ _ _+T -55°C to +125°C 5 SOT23 MAX6518UK_ _ _ _+T -55°C to +125°C 5 SOT23 MAX6519UK_ _ _ _+T -55°C to +125°C 5 SOT23 Note: These parts are offered in 16 standard temperature versions with a minimum order of 2500 pieces. To complete the suffix information, add P or N for positive or negative trip temperature, and select an available trip point in degrees centigrade. For example, the MAX6516UKP065+T describes a MAX6516 in a 5-pin SOT23 package with a +65°C threshold. Contact the factory for pricing and availability. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Functional Diagram appears at end of data sheet. Pin Configurations TOP VIEW OUT 1 5 Servers GND 2 (TOVER) TOVER (MAX6516) MAX6517 OUT 1 GND 2 5 (TUNDER) TUNDER 4 VCC 5 (TUNDER) TUNDER 4 VCC (MAX6516) MAX6517 Typical Operating Circuit HYST 3 4 VCC HYST 3 VCC SOT23 100kΩ SOT23 VCC TOVER VCC 0.1μF HYST 1 MICROCONTROLLER MAX6517 GND 2 OUT GND INT HYST 5 (TOVER) TOVER (MAX6518) MAX6519 HYST 1 GND 2 (MAX6518) MAX6519 ADC IN GND OUT 3 4 SOT23 VCC OUT 3 SOT23 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX6516–MAX6519 General Description MAX6516–MAX6519 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) SOT23 (derate 3.1mW/°C above +70°C) .....................247mW Operating Temperature Range ........................-55°C to +125°C Junction Temperature ..................................................... +150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C Soldering Temperature (reflow) .......................................+260°C All voltages are referenced to GND. VCC ...........................................................................-0.3V to +6V TOVER, TUNDER (open drain)................................ -0.3V to +6V TOVER, TUNDER (push-pull) .................... -0.3V to (VCC + 0.3V) OUT, HYST .................................................-0.3V to (VCC + 0.3V) OUT Short to GND .........................................................Indefinite 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 = 2.7V to 5.5V, RPULLUP = 100kΩ (open-drain output only), TA = -55°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Supply Voltage Range Supply Current Temperature Threshold Accuracy (Note 2) SYMBOL CONDITIONS VCC ICC ΔTTH HYST Input Logic Level (Note 4) THYST Hot-temperature thresholds (+35°C to +115°C) 22 Cold-temperature thresholds (-45°C to +15°C) 40 Logic Output Voltage Low (Push-Pull and Open Drain) VOL UNITS 5.5 V 40 -15°C to +65°C -1.5 +1.5 +75°C to +115°C -2.5 +2.5 -3 2 HYST = GND 10 °C 0.8 x VCC 0.2 x VCC ISOURCE = 500µA, VCC > 2.7V 0.8 x VCC ISOURCE = 800µA, VCC > 4.5V VCC - 1.5 V V ISINK = 1.2mA, VCC > 2.7V 0.3 ISINK = 3.2mA, VCC > 4.5V 0.4 VCC = 2.7V, open-drain output = 5.5V °C +3 HYST = VCC VIL VOH MAX µA VIH Logic Output Voltage High (Push-Pull) Open-Drain Output Leakage Current TYP 2.7 -45°C to -25°C (Note 3) Temperature Threshold Hysteresis MIN 10 V nA OUT TEMPERATURE SENSITIVITY Error to Equation: OUT = 1.8015V - 10.62mV(T - 30) - 1.1µV (T - 30)2 -30°C to +125°C, VCC = 2.7V to 5.5V -2 +2 -55°C to -30°C (Note 3) -5 +2 Sensor Gain -10.62 OUT Capacitive Load (Note 4) OUT Load Regulation OUT Line Regulation mV/°C 1000 0 < IOUT < 40µA -1µA < IOUT < 0 0.24 0.02 0.04 °C 0.3 pF °C °C/V Note 1: 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design. Note 2: The MAX6516–MAX6519 are available with internal factory-programmed temperature trip thresholds from -45°C to +115°C in 10°C increments. Note 3: VCC must be greater than 4.5V for a switching threshold of -45°C. Note 4: Guaranteed by design. 2 _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 TRIP-THRESHOLD ACCURACY 40 2.50 TEMPERATURE ERROR (°C) 2.25 2.00 VOUT (V) 30 20 1.75 1.50 1.25 1.00 10 2 MAX6516 toc03 SAMPLE SIZE = 147 MAX6516 toc02 2.75 MAX6516 toc01 1 0 -1 0.75 0.50 1.0 -1.25 -0.75 -0.25 0 0.5 TO -1.5 TO -1.0 TO -0.5 TO 0.25 TO 0.75 TO 1.25 -2 -55 -35 -15 25 45 65 85 105 125 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (°C) OUTPUT VOLTAGE vs. SUPPLY VOLTAGE TOVER/TUNDER OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT 1.8300 MAX6516 toc04 30 25 TEMPERATURE (°C) ACCURACY (°C) SUPPLY CURRENT vs. TEMPERATURE 5 TA = +30°C 1.8250 5 1.8200 MAX6516 toc06 0 MAX6516 toc05 PERCENTAGE OF PARTS SAMPLED (%) 50 4 1.8150 15 1.8100 VOH (V) 20 VOUT (V) SUPPLY CURRENT (μA) TEMPERATURE ERROR vs. TEMPERATURE OUTPUT VOLTAGE vs. TEMPERATURE MAX6516–MAX6519 Typical Operating Characteristics (VCC = 5V, TA = +25°C, unless otherwise noted.) 1.8050 2 1.8000 10 3 1.7950 1 1.7900 5 1.7850 0 0 1.7800 -55 -35 -15 5 25 45 65 85 105 125 2.5 3.0 3.5 4.0 4.5 5.0 0 5.5 1 2 3 4 5 6 7 8 TEMPERATURE (°C) SUPPLY VOLTAGE (V) ISINK (mA) TOVER/TUNDER OUTPUT VOLTAGE LOW vs. SOURCE CURRENT THERMAL STEP RESPONSE IN PERFLOURINATED FLUID THERMAL STEP RESPONSE IN STILL AIR MAX6516 toc07 400 +25°C +25°C +18.5°C/div +18.5°C/div VOL (V) 10 MAX6516 toc09 MAX6516 toc08 500 9 300 200 +100°C +100°C 100 0 0 1 2 3 4 5 6 7 8 9 10 2s/div 10s/div ISINK (mA) _______________________________________________________________________________________ 3 MAX6516–MAX6519 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 Typical Operating Characteristics (continued) (VCC = 5V, TA = +25°C, unless otherwise noted.) STARTUP AND POWER-DOWN (TEMP < TTH) STARTUP DELAY (TEMP > TTH) MAX6516 toc10 MAX6516 toc11 VCC (5V/div) VCC (5V/div) TOVER (5V/div) TOVER (5V/div) VOUT (5V/div) VOUT (5V/div) 200μs/div 200μs/div Pin Description PIN MAX6516 MAX6518 MAX6519 NAME FUNCTION 1 1 3 3 OUT Analog Output. Voltage represents the die’s temperature. 2 2 2 2 GND Ground 3 3 1 1 HYST Hysteresis Input. Connect to VCC for 2°C of hysteresis or to GND for 10°C hysteresis. 4 4 4 4 VCC 5 — 5 — TOVER Push-Pull Active-High Output (Hot Threshold). TOVER goes high when the die temperature exceeds the factory-programmed hot temperature threshold. Input Supply. Bypass to ground with a 0.1µF capacitor. — 5 — 5 TOVER Open-Drain, Active-Low Output (Hot Threshold). TOVER goes low when the die temperature exceeds the factory-programmed hot temperature threshold. Connect to a 100kΩ pullup resistor. May be pulled up to a voltage higher than VCC. 5 — 5 — TUNDER Push-Pull Active-High Output (Cold Threshold). TUNDER goes high when the die temperature falls below the factory-programmed cold temperature threshold. TUNDER Open-Drain, Active-Low Output (Cold Threshold). TUNDER goes low when the die temperature goes below the factory-programmed cold temperature threshold. Connect to a 100kΩ pullup resistor. May be pulled up to a voltage higher than VCC. — 4 MAX6517 5 — 5 _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 Logic Temperature Indicators The MAX6516–MAX6519 fully integrated temperature switches incorporate a fixed reference, an analog temperature sensor, and a comparator. The temperature at which the two reference voltages are equal determines the temperature trip point. OUT is an analog voltage that varies with the die’s temperature. Pin-selectable 2°C or 10°C hysteresis keeps the digital output from oscillating when the die temperature approaches the threshold temperature. The MAX6516 and MAX6518 have an active-high, push-pull output structure that can sink or source current. The MAX6517 and MAX6519 have an active-low, open-drain output structure that can only sink current. The internal power-on reset circuit guarantees the logic output is at its +25°C state for at least 50µs. Overtemperature Indicator (Hot Thresholds) TOVER and TOVER designations apply to thresholds above TA = +25°C (+35°C, +45°C, +55°C, +65°C, +75°C, +85°C, +95°C, +105°C, +115°C). All “hot” thresholds are positive temperatures. The overtemperature indicator output is open-drain active low (TOVER) or push-pull active high (TOVER). TOVER goes low when the die temperature exceeds the factory-programmed temperature threshold. TOVER should be pulled up to a voltage no greater than 5.5V with a 100kΩ pullup resistor. TOVER is a push-pull active-high CMOS output that goes high when the die temperature exceeds the factory-programmed temperature threshold. Analog Output OUT is an analog output that is proportional to the die temperature. OUT voltage range is between 0.77V to 2.59V, within the temperature range of -45°C to +125°C. For applications with a switching threshold of -45°C, the supply voltage must be greater than 4.5V. The temperature-to-voltage transfer function is approximately linear and can be described by the quadratic equation: VOUT = 1.8015 - 10.62mV (T - 30) + 1.1µV (T - 30)2 Undertemperature Indicator (Cold Thresholds) TUNDER and TUNDER designations apply to thresholds below TA = +25°C (+15°C, +5°C, -5°C, -15°C, -25°C, -35°C, -45°C). The undertemperature indicator output is open drain, active low (TUNDER), or push-pull active high (TUNDER). TUNDER goes low when the die temperature goes below the factory-programmed temperature threshold. TUNDER should be pulled up to a voltage no greater than 5.5V with a 100kΩ pullup resistor. TUNDER is a push-pull active-high CMOS output that goes high when the die temperature falls below the factory-programmed temperature threshold. Applications Information where T = temperature in °C. In most cases, a linear approximation can be applied: VOUT = 1.8015 - 10.62mV (T - 30) Therefore, T= 1.8015 − VOUT + 30°C 0.01062 Hysteresis Input The HYST input selects the devices’ temperature hysteresis and prevents the output from oscillating when the temperature approaches the trip point. Connect HYST to VCC for 2°C hysteresis or to GND for 10°C hysteresis. Temperature-Window Alarm The MAX6516/MAX6518 logic outputs assert when the die temperature is outside the factory-programmed range. Combining the outputs of two devices creates an over/undertemperature alarm. Two MAX6516s or two MAX6518s are used to form two complementary pairs, containing one cold trip-point output and one hot trip-point output. The assertion of either output alerts the system to an out-of-range temperature. The MAX6516 push-pull output stages can be ORed to produce a thermal out-of-range alarm (Figure 1). More favorably, two MAX6517s or two MAX6519s can be directly wire-ORed with a single external resistor to accomplish the same task. The temperature window alarms shown in Figure 2 can be used to accurately determine when a device’s temperature falls out of the -5°C to +75°C range. The thermal overrange signal can be used to assert a thermal shutdown, power-up, recalibration, or other temperature-dependent function. _______________________________________________________________________________________ 5 MAX6516–MAX6519 Detailed Description MAX6516–MAX6519 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 5V 5V VCC OUT 100kΩ OUT OF RANGE MAX6516UKP075 VCC GND HYST VCC TUNDER TOVER OVERTEMP TOVER OUT OF RANGE MAX6517UKP075 MAX6517UKN005 OUT VCC GND TUNDER OUT HYST HYST GND UNDERTEMP MAX6516UKN005 Figure 2. Temperature Window Alarm Using the MAX6517 GND HYST OUT 5V Figure 1. Temperature-Window Alarms Using the MAX6516 VCC TOVER SYSTEM SHUTDOWN Low-Cost, Fail-Safe Temperature In high-performance/high-reliability applications, multiple temperature monitoring is important. The high-level integration and low cost of the MAX6516 and MAX6518 facilitate the use of multiple temperature monitors to increase system reliability. The application in Figure 3 uses two MAX6516s with different hot temperature thresholds to ensure that fault conditions that can overheat the monitored device cause no permanent damage. The first temperature monitor activates the fan when the die temperature exceeds +45°C. The second MAX6516 triggers a system shutdown if the die temperature reaches +75°C, preventing damage from a wide variety of destructive fault conditions, including latchups, short circuits, and cooling-system failures. MAX6516UKP075 OUT HEAT μP GND HYST VCC GND FAN CONTROL TOVER HYST MAX6516UKP045 HEAT OUT PC Board Testing The MAX6516–MAX6519 temp sensor devices can be tested after PC board assembly using OUT. Testing can be used to verify proper assembly and functionality of the temperature protection circuitry. Since OUT has a weak drive capability, the voltage at OUT can be forced to cause the digital outputs to change states, thereby verifying that the internal comparators and output circuitry function properly after assembly. Below is a test procedure that can be used to test the MAX6516–MAX6519: • Power up the device, measure OUT, and observe the state of the logic output. 6 GND Figure 3. Low-Power, High-Reliability, Fail-Safe Temperature Monitor _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 T= 1.8015 − VOUT + 30 0.01062 • Verify that the temperature measured is within ±2°C of the ambient board temperature. Measure the ambient board temperature using an accurate calibrated temperature sensor. • Connect OUT to ground (OUT to V CC for cold threshold versions) and observe the state change of the logic output. • Disconnect OUT from ground and observe that the logic output reverts to its initial state. Hysteresis Testing The MAX6516–MAX6519 can be programmed with 2°C or 10°C of hysteresis by pin strapping HYST to VCC or GND, respectively. Below is a test feature that can be used to measure the accuracy of the device’s hysteresis using a device with a +65°C threshold: • Power up the device and observe the state of the digital output. • Drive the OUT voltage down gradually. • When the digital output changes state, note VOUT. • V OUT trip = V OUT at logic output change of state (high to low or low to high). The MAX6516–MAX6519 supply current is typically 22µA. When used to drive high-impedance loads, the devices dissipate negligible power. Therefore, the die temperature is essentially the same as the package temperature. Accurate temperature monitoring depends on the thermal resistance between the device being monitored and the MAX6516–MAX6519 die. Heat flows in and out of plastic packages, primarily through the leads. Pin 2 of the 5-pin SOT23 package provides the lowest thermal resistance to the die. Short, wide copper traces between the MAX6516–MAX6519 and the object whose temperature is being monitored ensures heat transfers occur quickly and reliably. The rise in die temperature due to self-heating is given by the following formula: ΔTJ = PDISSIPATION ✕ θJA where P DISSIPATION is the power dissipated by the MAX6516–MAX6519, and θJA is the thermal resistance of the package. The typical thermal resistance is 140°C/W for the 5-pin SOT23 package. To limit the effects of selfheating, minimize the output current. For example, if the MAX6516–MAX6519 sink 1mA, the open-drain output voltage is guaranteed to be less than 0.3V. Therefore, an additional 0.3mW of power is dissipated within the IC. This corresponds to a 0.042°C shift in the die temperature in the 5-pin SOT23 package. • Calculate trip temperature (T1) using: 1.8015 − VOUT T= + 30 0.01062 Chip Information PROCESS: BiCMOS • Gradually raise VOUT until the digital output reverts to its initial state and note VOUT. • Calculate trip temperature (T2). • THYST = T2 - T1. _______________________________________________________________________________________ 7 MAX6516–MAX6519 Thermal Considerations • Calculate the temperature using the formula: MAX6516–MAX6519 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 Package Information Table 1. Top Marks PART TOP MARK PART TOP MARK MAX6516UKN045 AEHS MAX6518UKN045 AELL MAX6516UKN035 AECZ MAX6518UKN035 AEDD MAX6516UKN025 AEHR MAX6518UKN025 AELK MAX6516UKN015 AEHQ MAX6518UKN015 AELJ MAX6516UKN005 AEHP MAX6518UKN005 AELI MAX6516UKP005 AEHT MAX6518UKP005 AELM MAX6516UKP015 AEHU MAX6518UKP015 AELN MAX6516UKP035 AEHV MAX6518UKP035 AELO MAX6516UKP045 AEHW MAX6518UKP045 AELP MAX6516UKP055 AEHX MAX6518UKP055 AELQ MAX6516UKP065 AEHY MAX6518UKP065 AELR MAX6516UKP075 AEDA MAX6518UKP075 AEDE MAX6516UKP085 AEHZ MAX6518UKP085 AELS MAX6516UKP095 AEIA MAX6518UKP095 AELT MAX6516UKP105 AEIB MAX6518UKP105 AELU MAX6516UKP115 AEIC MAX6518UKP115 AELV MAX6517UKN045 AELZ MAX6519UKN045 AEIG MAX6517UKN035 AEDB MAX6519UKN035 AEDF MAX6517UKN025 AELY MAX6519UKN025 AEIF MAX6517UKN015 AELX MAX6519UKN015 AEIE MAX6517UKN005 AELW MAX6519UKN005 AEID MAX6517UKP005 AEMA MAX6519UKP005 AEIH MAX6517UKP015 AEMB MAX6519UKP015 AEII MAX6517UKP035 AEMC MAX6519UKP035 AEIS MAX6517UKP045 AEMD MAX6519UKP045 AEIK MAX6517UKP055 AEME MAX6519UKP055 AEIL MAX6517UKP065 AEMF MAX6519UKP065 AEIM MAX6517UKP075 AEDC MAX6519UKP075 AEDG MAX6517UKP085 AEMG MAX6519UKP085 AEIN MAX6517UKP095 AEMH MAX6519UKP095 AEIO MAX6517UKP105 AEMI MAX6519UKP105 AEIP MAX6517UKP115 AEMJ MAX6519UKP115 AEIQ 8 For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 5 SOT23 U5+2 21-0057 90-0174 _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 OUT V MAX6516/MAX6518 (HOT THRESHOLD) TOVER TOVER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK HYST TEMP MAX6516/ MAX6518 COLD OUT +25°C TTH HOT V MAX6517/MAX6519 (HOT THRESHOLD) WITH 100kΩ PULLUP TOVER TOVER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK HYST TEMP MAX6517/ MAX6519 COLD OUT +25°C TTH HOT V MAX6516/MAX6518 (COLD THRESHOLD) TUNDER TUNDER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK HYST TEMP MAX6516/ MAX6518 COLD OUT TTH +25°C HOT V MAX6517/MAX6519 (COLD THRESHOLD) WITH 100kΩ PULLUP TUNDER TUNDER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE MAX6517/ MAX6519 HYST NETWORK HYST TEMP COLD TTH +25°C HOT _______________________________________________________________________________________ 9 MAX6516–MAX6519 Functional Diagram MAX6516–MAX6519 Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 Revision History REVISION NUMBER REVISION DATE 0 11/03 1 2/11 DESCRIPTION Initial release PAGES CHANGED — Changed the leaded parts to lead(Pb)-free parts in the Ordering Information table; in the Absolute Maximum Ratings section changed the continuous power dissipation numbers (7.1mW/°C to 3.1mW/°C and 571mW to 247mW); added the Package Information table 1, 2, 8 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.