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LM57器件是一款具有模擬溫度傳感器輸出的精密雙路輸出溫度開關,適用于寬溫度范圍的工業級應用。跳變溫度( T TRIP )可從-40°C至150°C溫度范圍內的256種可能值中進行選擇.V TEMP 是AB類模擬電壓輸出,該電壓輸出與溫度成正比,負溫度系數(NTC)可編程。兩個外部1%電阻設置T TRIP 和V TEMP 斜率。數字和模擬輸出具有保護功能,并且可監視系統過熱事件。
內置的熱滯后功能(T HYST )可防止數字輸出發生振蕩.T OVER 和 T OVER 數字輸出將在芯片溫度超過T TRIP 時置為有效,在芯片溫度低于T TRIP 與T HYST 的差值時置為無效。
T OVER 為高電平有效,并且采用推挽結構。 T OVER 為低電平有效,并且采用開漏結構。將T OVER 與TRIP-TEST相連,可在輸出發生跳變后將其鎖定。將TRIP-TEST強制為低電平可將輸出清零。將TRIP-TEST驅動為高電平會將數字輸出置為有效。處理器可檢查T OVER 或< span style =“text-decoration:overline”> T OVER 的狀態,從而確認它們是否已切換至激活狀態。這樣一來,便可以在系統裝配后現場驗證比較器和輸出電路的功能。當TRIP-TEST為高電平時,V TEMP 引腳為跳變基準電壓。系統隨后可使用該電壓計算LM57
所有商標均為各自所有者的財產。
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 | LM26LV | LM56 | TMP300 | TMP708 | TMP709 |
---|---|---|---|---|---|
-50 to 150 | 0 to 150 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
1.5 | 2.3 | 3 | 2 | 3 | 3 |
-5.2 to -12.9 | -5.1 to -12.8 | 6.2 | 10 | ||
-40 to 150 |
Range (0 to 150) 50, 60, 65, 70 75, 80, 85, 90 95, 100, 105, 110 115, 120, 125, 130 135, 140, 145, 150 |
-40 to 125 | -40 to 125 | 0 to 125 | 0 to 125 |
Resistor Programmable | Factory Programmed | Resistor Programmable | Resistor Programmable | Resistor Programmable | Resistor Programmable |
Open Drain Push Pull |
Open Drain Push Pull |
Open Drain | Open Drain | Open Drain | Open Drain |
2.4 | 1.6 | 2.7 | 1.8 | 2.7 | 2.7 |
5.5 | 5.5 | 10 | 18 | 5.5 | 5.5 |
24 | 8 | 230 | 110 | 40 | 40 |
1 | 1 | 2 | 1 | 1 | 1 |
Built-in Hysteresis Hysteresis (5°C or 10°C) Temperature Sensor and Switch Trip Test |
Built-in Hysteresis Hysteresis (5°C) Temperature Sensor and Switch Trip Test |
Built-in Hysteresis Hysteresis (5°C) Temperature Sensor and Switch |
Hysteresis (5°C or 10°C) Pin-Selectable Hysteresis Temperature Sensor and Switch |
Hysteresis (10°C or 30°C) Pin-Selectable Hysteresis |
Hysteresis (2°C or 10°C) Pin-Selectable Hysteresis |
Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
TSSOP WSON |
WSON |
SOIC VSSOP |
SC70 SOT-23 |
SOT-23 | SOT-23 |
8TSSOP: 19 mm2: 6.4 x 3(TSSOP) See datasheet (WSON) |
See datasheet (WSON) |
8SOIC: 29 mm2: 6 x 4.9(SOIC) 8VSSOP: 15 mm2: 4.9 x 3(VSSOP) |
6SC70: 4 mm2: 2.1 x 2(SC70) 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) |
5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) |
Analog Output Switch |
Analog Output Switch |
Analog Output Switch |
Analog Output Switch |
Switch | Switch |