View MAX6516-BMAX6519_422770.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3007; Rev 0; 11/03
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23
General Description
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 -45C to +115C in 10C increments, and are accurate to 0.5C (typ). These devices require no external components and typically consume 22A of supply current. Hysteresis is pin selectable at 2C or 10C. The MAX6516-MAX6519 are offered with hot-temperature thresholds (+35C to +115C), asserting when the temperature is above the threshold, or with cold-temperature thresholds (-45C to +15C), 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 -35C to +125C with a supply voltage of 2.7V to 5.5V. For applications sensing temperature down to -45C, 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 -55C to +125C temperature range.
Features
o High Accuracy 1.5C (max) Over -15C to +65C Temperature Range o Low Power Consumption--22A Typical Current o Factory-Programmed Thresholds from -45C to +115C in 10C Increments o Analog Output to Allow Board-Level Testing o Open-Drain or Push-Pull Outputs o Pin-Selectable 2C or 10C Hysteresis o Low Cost
MAX6516-MAX6519
Ordering Information
PART MAX6516UK_ _ _ _-T MAX6517UK_ _ _ _-T MAX6518UK_ _ _ _-T MAX6519UK_ _ _ _-T TEMP RANGE -55C to +125C -55C to +125C -55C to +125C -55C to +125C PIN-PACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5
*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 +65C threshold. Contact the factory for pricing and availability.
Functional Diagram appears at end of data sheet.
Applications
Fan Control Test Equipment Temperature Control Temperature Alarms Over/Undertemperature Protection Notebook, Desktop PCs RAID Servers
OUT 1 5
Pin Configurations
TOP VIEW
(TOVER) TOVER (TUNDER) TUNDER
OUT
1
5
GND 2
(MAX6516) MAX6517
4 VCC
GND 2
(MAX6516) MAX6517
4 VCC
Typical Operating Circuit
HYST 3 HYST 3
VCC 100k VCC VCC 0.1F TOVER INT MICROCONTROLLER
GND 2 HYST 1 5 (TOVER) TOVER HYST 1 5 (TUNDER) TUNDER
SOT23
SOT23
MAX6517
OUT GND HYST
(MAX6518) MAX6519
4 VCC
GND 2
(MAX6518) MAX6519
4 VCC
ADC IN GND
OUT 3 OUT 3
SOT23
SOT23
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 MAX6516-MAX6519
ABSOLUTE MAXIMUM RATINGS
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 Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW Operating Temperature Range ........................-55C to +125C Junction Temperature ..................................................... +150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) ................................ +300C
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 = 100k (open-drain output only), TA = -55C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Supply Voltage Range SYMBOL VCC Hot-temperature thresholds (+35C to +115C) Supply Current ICC Cold-temperature thresholds (-45C to +15C) -15C to +65C Temperature Threshold Accuracy (Note 2) Temperature Threshold Hysteresis HYST Input Logic Level (Note 4) Logic Output Voltage High (Push-Pull) Logic Output Voltage Low (Push-Pull and Open Drain) Open-Drain Output Leakage Current OUT TEMPERATURE SENSITIVITY Error to Equation: OUT = 1.8015V - 10.62mV(T - 30) - 1.1V (T - 30)2 Sensor Gain OUT Capacitive Load (Note 4) OUT Load Regulation OUT Line Regulation 0 < IOUT < 40A -1A < IOUT < 0 0.02 0.04 0.3 -30C to +125C, VCC = 2.7V to 5.5V -55C to -30C (Note 3) -2 -5 -10.62 1000 0.24 +2 +2 C mV/C pF C C/V TTH +75C to +115C -45C to -25C (Note 3) THYST VIH VIL VOH VOL ISOURCE = 500A, VCC > 2.7V ISOURCE = 800A, VCC > 4.5V ISINK = 1.2mA, VCC > 2.7V ISINK = 3.2mA, VCC > 4.5V VCC = 2.7V, open-drain output = 5.5V 10 0.8 x VCC VCC - 1.5 0.3 0.4 HYST = VCC HYST = GND 0.8 x VCC 0.2 x VCC -1.5 -2.5 -3 2 10 CONDITIONS MIN 2.7 22 40 +1.5 +2.5 +3 C V V V nA C TYP MAX 5.5 40 A UNITS V
Note 1: 100% production tested at TA = +25C. Specifications over temperature are guaranteed by design. Note 2: The MAX6516-MAX6519 are available with internal factory-programmed temperature trip thresholds from -45C to +115C in 10C increments. Note 3: VCC must be greater than 4.5V for a switching threshold of -45C. Note 4: Guaranteed by design. 2 _______________________________________________________________________________________
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23
Typical Operating Characteristics
(VCC = 5V, TA = +25C, unless otherwise noted.)
TEMPERATURE ERROR vs. TEMPERATURE
MAX6516 toc02 MAX6516 toc03
MAX6516-MAX6519
TRIP-THRESHOLD ACCURACY
PERCENTAGE OF PARTS SAMPLED (%) SAMPLE SIZE = 147 40
MAX6516 toc01
OUTPUT VOLTAGE vs. TEMPERATURE
2.75 2.50 2.25 2.00 VOUT (V) 2
50
TEMPERATURE ERROR (C) -55 -35 -15 5 25 45 65 85 105 125
1
30
1.75 1.50 1.25
0
20
10
1.00 0.75
-1
0 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 ACCURACY (C)
0.50 TEMPERATURE (C)
-2 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C)
SUPPLY CURRENT vs. TEMPERATURE
MAX6516 toc04
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
MAX6516 toc05
TOVER/TUNDER OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT
MAX6516 toc06
30 25 SUPPLY CURRENT (A) 20
1.8300 1.8250 1.8200 1.8150 VOUT (V)
TA = +30C
5
4
15 10 5 0 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C)
1.8050 1.8000 1.7950 1.7900 1.7850 1.7800 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V)
VOH (V)
1.8100
3
2
1
0 0 1 2 3 4 5 6 7 8 9 10 ISINK (mA)
TOVER/TUNDER OUTPUT VOLTAGE LOW vs. SOURCE CURRENT
MAX6516 toc07
THERMAL STEP RESPONSE IN PERFLOURINATED FLUID
MAX6516 toc08
THERMAL STEP RESPONSE IN STILL AIR
MAX6516 toc09
500
+25C
+25C +18.5C/div +18.5C/div
400
VOL (V)
300
200 +100C 100
+100C
0 0 1 2 3 4 5 6 7 8 9 10 2s/div 10s/div ISINK (mA)
_______________________________________________________________________________________
3
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 MAX6516-MAX6519
Typical Operating Characteristics (continued)
(VCC = 5V, TA = +25C, unless otherwise noted.)
STARTUP AND POWER-DOWN (TEMP < TTH)
MAX6516 toc10
STARTUP DELAY (TEMP > TTH)
MAX6516 toc11
VCC (5V/div)
VCC (5V/div)
TOVER (5V/div)
TOVER (5V/div)
VOUT (5V/div) 200s/div 200s/div
VOUT (5V/div)
Pin Description
PIN MAX6516 1 2 3 4 5 MAX6517 1 2 3 4 -- MAX6518 MAX6519 3 2 1 4 5 3 2 1 4 -- NAME OUT GND HYST VCC TOVER FUNCTION Analog Output. Voltage represents the die's temperature. Ground Hysteresis Input. Connect to VCC for 2C of hysteresis or to GND for 10C hysteresis. Input Supply. Bypass to ground with a 0.1F capacitor. Push-Pull Active-High Output (Hot Threshold). TOVER goes high when the die temperature exceeds the factory-programmed hot temperature threshold. Open-Drain, Active-Low Output (Hot Threshold). TOVER goes low when the die temperature exceeds the factory-programmed hot temperature threshold. Connect to a 100k pullup resistor. May be pulled up to a voltage higher than VCC. Push-Pull Active-High Output (Cold Threshold). TUNDER goes high when the die temperature falls below the factory-programmed cold temperature threshold. 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 100k pullup resistor. May be pulled up to a voltage higher than VCC.
--
5
--
5
TOVER
5
--
5
--
TUNDER
--
5
--
5
TUNDER
4
_______________________________________________________________________________________
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23
Detailed Description
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 2C or 10C 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 +25C state for at least 50s.
Logic Temperature Indicators
Overtemperature Indicator (Hot Thresholds) TOVER and TOVER designations apply to thresholds above TA = +25C (+35C, +45C, +55C, +65C, +75C, +85C, +95C, +105C, +115C). 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 100k pullup resistor. TOVER is a push-pull active-high CMOS output that goes high when the die temperature exceeds the factory-programmed temperature threshold. Undertemperature Indicator (Cold Thresholds) TUNDER and TUNDER designations apply to thresholds below TA = +25C (+15C, +5C, -5C, -15C, -25C, -35C, -45C). 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 100k 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.
MAX6516-MAX6519
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 -45C to +125C. For applications with a switching threshold of -45C, 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) + 1.1V (T - 30)2 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 + 30C 0.01062
Applications Information
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 -5C to +75C range. The thermal overrange signal can be used to assert a thermal shutdown, power-up, recalibration, or other temperature-dependent function.
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 2C hysteresis or to GND for 10C hysteresis.
_______________________________________________________________________________________
5
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 MAX6516-MAX6519
5V VCC OUT 5V 100k OUT OF RANGE
MAX6516UKP075
VCC GND HYST TOVER OUT OF RANGE TOVER OVERTEMP TUNDER VCC
MAX6517UKP075
OUT GND HYST
MAX6517UKN005
OUT GND HYST
VCC
TUNDER UNDERTEMP
MAX6516UKN005 Figure 2. Temperature Window Alarm Using the MAX6517
OUT
5V
GND HYST
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 +45C. The second MAX6516 triggers a system shutdown if the die temperature reaches +75C, preventing damage from a wide variety of destructive fault conditions, including latchups, short circuits, and cooling-system failures.
MAX6516UKP075
OUT HEAT GND HYST
P GND
VCC HYST TOVER
FAN CONTROL
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
* Calculate the temperature using the formula: T= 1.8015 - VOUT + 30 0.01062
Thermal Considerations
The MAX6516-MAX6519 supply current is typically 22A. 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: TJ = PDISSIPATION JA where P DISSIPATION is the power dissipated by the MAX6516-MAX6519, and JA is the thermal resistance of the package. The typical thermal resistance is +140C/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 0.042C shift in the die temperature in the 5-pin SOT23 package.
MAX6516-MAX6519
* Verify that the temperature measured is within 2C 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 2C or 10C 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 +65C 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). * Calculate trip temperature (T1) using: 1.8015 - VOUT T= + 30 0.01062 * Gradually raise VOUT until the digital output reverts to its initial state and note VOUT. * Calculate trip temperature (T2). * THYST = T2 - T1.
Chip Information
TRANSISTOR COUNT: 1808 PROCESS: BiCMOS
_______________________________________________________________________________________
7
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 MAX6516-MAX6519
Table 1. Top Marks
PART MAX6516UKN045 MAX6516UKN035 MAX6516UKN025 MAX6516UKN015 MAX6516UKN005 MAX6516UKP005 MAX6516UKP015 MAX6516UKP035 MAX6516UKP045 MAX6516UKP055 MAX6516UKP065 MAX6516UKP075 MAX6516UKP085 MAX6516UKP095 MAX6516UKP105 MAX6516UKP115 MAX6517UKN045 MAX6517UKN035 MAX6517UKN025 MAX6517UKN015 MAX6517UKN005 MAX6517UKP005 MAX6517UKP015 MAX6517UKP035 MAX6517UKP045 MAX6517UKP055 MAX6517UKP065 MAX6517UKP075 MAX6517UKP085 MAX6517UKP095 MAX6517UKP105 MAX6517UKP115 TOP MARK AEHS AECZ AEHR AEHQ AEHP AEHT AEHU AEHV AEHW AEHX AEHY AEDA AEHZ AEIA AEIB AEIC AELZ AEDB AELY AELX AELW AEMA AEMB AEMC AEMD AEME AEMF AEDC AEMG AEMH AEMI AEMJ PART MAX6518UKN045 MAX6518UKN035 MAX6518UKN025 MAX6518UKN015 MAX6518UKN005 MAX6518UKP005 MAX6518UKP015 MAX6518UKP035 MAX6518UKP045 MAX6518UKP055 MAX6518UKP065 MAX6518UKP075 MAX6518UKP085 MAX6518UKP095 MAX6518UKP105 MAX6518UKP115 MAX6519UKN045 MAX6519UKN035 MAX6519UKN025 MAX6519UKN015 MAX6519UKN005 MAX6519UKP005 MAX6519UKP015 MAX6519UKP035 MAX6519UKP045 MAX6519UKP055 MAX6519UKP065 MAX6519UKP075 MAX6519UKP085 MAX6519UKP095 MAX6519UKP105 MAX6519UKP115 TOP MARK AELL AEDD AELK AELJ AELI AELM AELN AELO AELP AELQ AELR AEDE AELS AELT AELU AELV AEIG AEDF AEIF AEIE AEID AEIH AEII AEIS AEIK AEIL AEIM AEDG AEIN AEIO AEIP AEIQ
8
_______________________________________________________________________________________
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23
Functional Diagram
OUT TOVER V MAX6516/MAX6518 (HOT THRESHOLD)
MAX6516-MAX6519
TOVER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK
HYST TEMP COLD +25C TTH HOT
MAX6516/ MAX6518
OUT TOVER TOVER
V MAX6517/MAX6519 (HOT THRESHOLD) WITH 100k PULLUP
NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK
HYST TEMP COLD +25C TTH HOT
MAX6517/ MAX6519
OUT TUNDER
V MAX6516/MAX6518 (COLD THRESHOLD)
TUNDER NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK
HYST TEMP COLD TTH +25C HOT
MAX6516/ MAX6518
OUT TUNDER TUNDER
V MAX6517/MAX6519 (COLD THRESHOLD) WITH 100k PULLUP
NEGATIVE TEMPCO REFERENCE FIXED REFERENCE HYST NETWORK
HYST TEMP COLD TTH +25C HOT
MAX6517/ MAX6519
_______________________________________________________________________________________
9
Low-Cost, 2.7V to 5.5V, Analog Temperature Sensor Switches in a SOT23 MAX6516-MAX6519
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
1 1
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 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
SOT-23 5L .EPS

▲Up To Search▲

Price & Availability of MAX6516-BMAX6519

	To Download MAX6516-BMAX6519 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .