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數(shù)據(jù)： LM57 電阻可編程溫度開(kāi)關(guān)和模擬溫度傳感器 數(shù)據(jù)表 (Rev. E)
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(kāi)關(guān)，適用于寬溫度范圍的工業(yè)級(jí)應(yīng)用。跳變溫度（ T TRIP ）可從-40°C至150°C溫度范圍內(nèi)的256種可能值中進(jìn)行選擇.V TEMP 是AB類(lèi)模擬電壓輸出，該電壓輸出與溫度成正比，負(fù)溫度系數(shù)（NTC）可編程。兩個(gè)外部1％電阻設(shè)置T TRIP 和V TEMP 斜率。數(shù)字和模擬輸出具有保護(hù)功能，并且可監(jiān)視系統(tǒng)過(guò)熱事件。
內(nèi)置的熱滯后功能（T HYST ）可防止數(shù)字輸出發(fā)生振蕩.T OVER 和 T OVER 數(shù)字輸出將在芯片溫度超過(guò)T TRIP 時(shí)置為有效，在芯片溫度低于T TRIP 與T HYST 的差值時(shí)置為無(wú)效。
T OVER 為高電平有效，并且采用推挽結(jié)構(gòu)。 T OVER 為低電平有效，并且采用開(kāi)漏結(jié)構(gòu)。將T OVER 與TRIP-TEST相連，可在輸出發(fā)生跳變后將其鎖定。將TRIP-TEST強(qiáng)制為低電平可將輸出清零。將TRIP-TEST驅(qū)動(dòng)為高電平會(huì)將數(shù)字輸出置為有效。處理器可檢查T(mén) OVER 或< span style =“text-decoration：overline”> T OVER 的狀態(tài)，從而確認(rèn)它們是否已切換至激活狀態(tài)。這樣一來(lái)，便可以在系統(tǒng)裝配后現(xiàn)場(chǎng)驗(yàn)證比較器和輸出電路的功能。當(dāng)TRIP-TEST為高電平時(shí)，V TEMP 引腳為跳變基準(zhǔn)電壓。系統(tǒng)隨后可使用該電壓計(jì)算LM57
所有商標(biāo)均為各自所有者的財(cái)產(chǎn)。
| 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 |
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