LM57-Q1 Automotive Grade, ±0.7°C Temperature Sensor with Resistor-Programmable Temp Switch | TI.com

LM57-Q1 (ACTIVE)

Automotive Grade, ±0.7°C Temperature Sensor with Resistor-Programmable Temp Switch

 

Description

The LM57-Q1 device is a precision, dual-output, temperature switch with analog temperature sensor output for wide temperature applications such as automotive grade. The trip temperature (TTRIP) is selected from 256 possible values in the range of –40°C to 160°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-Q1.

Features

  • Qualified for Automotive Applications, for
    Commercial Device See LM57 Data Sheet
  • AEC-Q100 Qualified with the Following Results:
    • Temperature Grade 0 Extended: −50°C to
      +160°C with Excursions up to 170°C Operating
      Temperature Range
    • Temperature Grade 0: −50°C to +150°C
      Operating Temperature Range
    • Temperature Grade 1: −50°C to +125°C
      Operating Temperature Range
    • HBM ESD Component Classification Level 2
    • CDM ESD Component Classification Level C5
  • Trip Temperature Set by External Resistors with
    Accuracy of ±2.3°C from −40°C to +150°C
  • Resistor Tolerance Contributes Zero Error
  • Push-Pull and Open-Drain Switch Outputs
  • Wide Operating Temperature Range of −50°C to
    160°C
  • Very Linear Analog VTEMP Temp Sensor Output
    with ±1.3°C Accuracy from −50°C to +150°C
  • Short-Circuit Protected Analog and Digital Outputs
  • Latching Function for Digital Outputs
  • TRIP-TEST Pin Allows In-System Testing
  • Low Power Minimizes Self-Heating to Under 0.02°C

Parametrics

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Part number Order Operating temperature range (C) Accuracy over temp range (Max) (C) Sensor gain (mV/Deg C) SetPoint value (deg C) SetPoint type Output type Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Typ) (uA) Comparator channels (#) Features Rating Package Group Package size: mm2:W x L (PKG) Interface
LM57-Q1 Order now -50 to 125
-50 to 150
-50 to 160    
1.3     -5.2 to 12.9     -40 to 160     Resistor Programmable     Open Drain
Push Pull    
2.4     5.5     24     1     Built-in Hysteresis
Hysteresis (5°C or 10°C)
Temperature Sensor and Switch
Trip Test    
Automotive     TSSOP | 8     8TSSOP: 19 mm2: 6.4 x 3 (TSSOP | 8)     Analog Output
Switch    
LM26LV-Q1 Order now -40 to 150     2.3     -5.1 to -12.8     Range (0 to 150)
130, 135    
Factory Programmed     Open Drain
Push Pull    
1.6     5.5     8     1     Built-in Hysteresis
Hysteresis (5°C)
Temperature Sensor and Switch
Trip Test    
Automotive     WSON | 6     See datasheet (WSON)     Analog Output
Switch    
TMP300-Q1 Order now -40 to 125     2     10     -40 to 125     Resistor Programmable     Open Drain     1.8     18     110     1     Hysteresis (5°C or 10°C)
Pin-Selectable Hysteresis
Temperature Sensor and Switch    
Automotive     SC70 | 6     6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)     Analog Output
Switch    
TMP708 Order now -40 to 125     3       0 to 125     Resistor Programmable     Open Drain     2.7     5.5     40     1     Hysteresis (10°C or 30°C)
Pin-Selectable Hysteresis    
Catalog     SOT-23 | 5     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)     Switch    
TMP708-Q1 Order now 0 to 125     3       0 to 125     Resistor Programmable     Open Drain     2.7     5.5     40     1     Hysteresis (10°C or 30°C)
Pin-Selectable Hysteresis    
Automotive     SOT-23 | 5     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)     Switch    
TMP709 Order now -40 to 125     3       0 to 125     Resistor Programmable     Open Drain     2.7     5.5     40     1     Hysteresis (2°C or 10°C)
Pin-Selectable Hysteresis    
Catalog     SOT-23 | 5     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)     Switch    
TMP709-Q1 Order now 0 to 125