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參數(shù)資料
| 型號(hào)： | LMC6762 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual MicroPower Rail-To-Rail Input CMOS Comparator with Push-Pull Output |
| 中文描述： | 雙微功耗軌至與推軌輸入的CMOS比較，推挽輸出 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 317K |
| 代理商： | LMC6762 |
Application Hints
1.0 Input Common-Mode Voltage Range
At supply voltages of 2.7V, 5V and 15V, the LMC6762 has an
input common-mode voltage range which exceeds both sup-
plies. As in the case of operational amplifiers, CMVR is de-
fined by the V
shift of the comparator over the
common-mode range of the device. A CMRR (
V
/
V
)
of 75 dB (typical) implies a shift of
<
1 mV over the entire
common-mode range of the device. The absolute maximum
input voltage at V
+
= 5V is 200 mV beyond either supply rail
at room temperature.
A wide input voltage range means that the comparator can
be used to sense signals close to ground and also to the
power supplies. This is an extremely useful feature in power
supply monitoring circuits.
An input common-mode voltage range that exceeds the sup-
plies, 20 fA input currents (typical), and a high input imped-
ance makes the LMC6762 ideal for sensor applications. The
LMC6762 can directly interface to sensors without the use of
amplifiers or bias circuits. In circuits with sensors which pro-
duce outputs in the tens to hundreds of millivolts, the
LMC6762 can compare the sensor signal with an appropri-
ately small reference voltage. This reference voltage can be
close to ground or the positive supply rail.
2.0 Low Voltage Operation
Comparators are the common devices by which analog sig-
nals interface with digital circuits. The LMC6762 has been
designed to operate at supply voltages of 2.7V without sac-
rificing performance to meet the demands of 3V digital sys-
tems.
At supply voltages of 2.7V, the common-mode voltage range
extends 200 mV (guaranteed) below the negative supply.
This feature, in addition to the comparator being able to
sense signals near the positive rail, is extremely useful in low
voltage applications.
At V
+
= 2.7V, propagation delays are t
= 4 μs and t
=
4 μs with overdrives of 100 mV. Please refer to the perfor-
mance curves for more extensive characterization.
3.0 Shoot-Through Current
The shoot-through current is defined as the current surge,
above the quiescent supply current, between the positive
and negative supplies of a device. The current surge occurs
when the output of the device switches states. This transient
switching current results in glitches in the supply voltage.
Usually, glitches in the supply lines are compensated by by-
pass capacitors. When the switching currents are minimal,
the values of the bypass capacitors can be reduced
considerably.
DS012320-5
FIGURE 1. An Input Signal Exceeds the LMC6762
Power Supply Voltages with No Output Phase
Inversion
DS012320-6
FIGURE 2. Even at Low-Supply Voltage of 2.7V, an
Input Signal which Exceeds the Supply Voltages
Produces No Phase Inversion at the Output
DS012320-7
FIGURE 3. LMC6762 Circuit for Measurement
of the Shoot-Through Current
www.national.com
8
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| LMC6762AIM | 功能描述:校驗(yàn)器 IC 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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)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 |
| LMC6762AIM | 制造商:Texas Instruments 功能描述:COMPARATOR DUAL CMOS R/R SMD 6762 |
| LMC6762AIM/NOPB | 功能描述:校驗(yàn)器 IC Dual Micropwr RRIN CMOS Comparator 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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)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 |
| LMC6762AIMNOPB | 制造商:Texas Instruments 功能描述: |
| LMC6762AIMX | 功能描述:校驗(yàn)器 IC 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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)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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