參數(shù)資料
型號： LMX339ASD
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 比較器
英文描述： General-Purpose, Low-Voltage, Single/Dual/Quad, Tiny-Pack Comparators
中文描述： QUAD COMPARATOR, 7000 uV OFFSET-MAX, PDSO14
封裝： 0.150 INCH, MS-012B, SOIC-14
文件頁數(shù)： 7/12頁
文件大?。?/td> 387K
代理商： LMX339ASD
L
General-Purpose, Low-Voltage,
Single/Dual/Quad, Tiny-Pack Comparators
_______________________________________________________________________________________
7
Detailed Description
The LMX331/LMX393/LMX339 are single/dual/quad,
low-cost, general-purpose comparators. They have a
single-supply operating voltage of 1.8V to 5V. The com-
mon-mode input range extends from -0.1V below the
negative supply to within 0.7V of the positive supply.
They require approximately 60μA per comparator with
a 5V supply and 40μA with a 2.7V supply.
The LMX331H/LMX393H/LMX339H have 2mV of hys-
teresis for noise immunity. This significantly reduces the
chance of output oscillations even with slow-moving
input signals. The LMX331/LMX393/LMX339 and
LMX331H/LMX393H/LMX339H are ideal for automotive
applications because they operate from -40
°
C to
+125
°
C (see
Typical Operating Characteristics
).
Applications Information
Hysteresis
Many comparators oscillate in the linear region of oper-
ation because of noise or undesired parasitic feed-
back. This tends to occur when the voltage on one
input is equal or very close to the voltage on the other
input. The LMX331H/LMX393H/LMX339H have internal
hysteresis to counter parasitic effects and noise.
The hysteresis in a comparator creates two trip points:
one for the rising input voltage and one for the falling
input voltage (Figure 1). The difference between the trip
points is the hysteresis. When the comparator's input
voltages are equal, the hysteresis effectively causes
one comparator input to move quickly past the other,
thus taking the input out of the region where oscillation
occurs. This provides clean output transitions for noisy,
slow-moving input signals.
Additional hysteresis can be generated with two resis-
tors, using positive feedback (Figure 2). Use the follow-
ing procedure to calculate resistor values:
OUT
IN-
THRESHOLDS
IN+
HYSTERESIS
BAND
V
HYST
V
TL
V
TH
Figure 1. Threshold Hysteresis Band (Not to Scale)
PIN
LMX331
1
2
3
4
5
—
—
—
—
—
—
—
—
—
—
—
—
LMX393
—
4
—
—
8
1
7
2
3
5
6
—
—
—
—
—
—
LMX339
—
12
—
—
3
2
1
4
5
7
6
8
9
10
11
13
14
NAME
FUNCTION
IN+
V
SS
IN-
OUT
V
DD
OUTA
OUTB
INA-
INA+
INB+
INB-
INC-
INC+
IND-
IND+
OUTD
OUTC
Noninverting Input
Negative Supply (Connect to GND)
Inverting Input
Comparator Output (Open-Drain)
Positive Supply
Comparator A Output (Open-Drain)
Comparator B Output (Open-Drain)
Comparator A Inverting Input
Comparator A Noninverting Input
Comparator B Noninverting Input
Comparator B Inverting Input
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Inverting Input
Comparator D Noninverting Input
Comparator D Output (Open-Drain)
Comparator C Output (Open-Drain)
Pin Description
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX339ASD+ 功能描述:校驗器 IC Low-Voltage Quad TinyPack RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
LMX339ASD+T 功能描述:校驗器 IC Low-Voltage Quad TinyPack RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
LMX339ASD-T 功能描述:校驗器 IC Low-Voltage Quad TinyPack RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
LMX339AUD 功能描述:校驗器 IC Low-Voltage Quad TinyPack RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
LMX339AUD+ 功能描述:校驗器 IC Low-Voltage Quad TinyPack RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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