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Thermostat Programmable Active High, Active Low Open Drain, Push-Pull 8-WSON (2.5x2.5)
QFNHersteller:
Herstellerteil #:
LM57CISD-10/NOPB
Datenblatt:
Trip Temperature Threshold:
Hot
Switching Temperature:
Programmable
Accuracy:
±2.3°C
Output Type:
Open Drain, Push-Pull
EDA/CAD Modelle:
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The LM57 device is a precision, dual-output, temperature switch with analog temperature sensor output for wide temperature industrial applications. The trip temperature (TTRIP) is selected from 256 possible values in the range of –40°C to +150°C. The VTEMP is a class AB analog voltage output that is proportional to temperature with a programmable negative temperature coefficient (NTC). Two external 1% resistors set the TTRIP and VTEMP slope. The digital and analog outputs enable protection and monitoring of system thermal events.
Built-in thermal hysteresis (THYST) prevents the digital outputs from oscillating. The TOVER and TOVER digital outputs will assert when the die temperature exceeds TTRIP and will de-assert when the temperature falls below a temperature equal to TTRIP minus THYST.
TOVER is active-high with a push-pull structure. TOVER is active-low with an open-drain structure. Tying TOVER to TRIP-TEST will latch the output after it trips. The output can be cleared by forcing TRIP-TEST low. Driving the TRIP-TEST high will assert the digital outputs. A processor can check the state of TOVER or TOVER, confirming they changed to an active state. This allows for in-situ verification that the comparator and output circuitry are functional after system assembly. When TRIP-TEST is high, the trip-level reference voltage appears at the VTEMP pin. The system could then use this voltage to calculate the threshold of the LM57.
Category | Sensors, TransducersTemperature SensorsThermostats - Solid State | Series | - |
Trip Temperature Threshold | Hot | Switching Temperature | Programmable |
Accuracy | ±2.3°C | Current - Output (Max) | - |
Output Type | Open Drain, Push-Pull | Output | Active High, Active Low |
Output Function | OverTemp, /OverTemp | Selectable Hysteresis | Yes |
Features | Selectable Trip Point, Trip Test | Voltage - Supply | 2.4 V ~ 5.5 V |
Current - Supply | 24µA | Operating Temperature | -50°C ~ 150°C |
Mounting Type | Surface Mount | Base Product Number | LM57 |
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Menge. | Einzelpreis | Ext. Preis |
---|---|---|
1+ | $4,040 | $4,04 |
200+ | $1,566 | $313,20 |
500+ | $1,509 | $754,50 |
1000+ | $1,482 | $1.482,00 |
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12 Std.