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参数资料
| 型号： | LT1715IMS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR 150MHZ DUAL 10MSOP |
| 标准包装： | 2,500 |
| 系列： | UltraFast™ |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | CMOS，满摆幅，TTL |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V |
| 电压 - 输入偏移（最小值）： | 2.5mV @ ±5V |
| 电流 - 输入偏压（最小值）： | 6µA @ ±5V |
| 电流 - 输出（标准）： | 20mA |
| 电流 - 静态（最大值）： | 2mA |
| CMRR, PSRR（标准）： | 70dB CMRR，80dB PSRR |
| 传输延迟（最大）： | 9ns |
| 磁滞： | 6mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 其它名称： | LT1715IMSTR |
LT1715
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APPLICATIONS INFORMATION
The bias conditions and signal swings in the output stage
are designed to turn their respective output transistors off
faster than on. This helps minimize the surge of current
from +VS to ground that occurs at transitions, to minimize
the frequency-dependent increase in power consumption.
The frequency dependence of the supply current is shown
in the Typical Performance Characteristics.
Speed Limits
The LT1715 comparator is intended for high speed ap-
plications, where it is important to understand a few
limitations. These limitations can roughly be divided into
three categories: input speed limits, output speed limits,
and internal speed limits.
There are no signicant input speed limits except the shunt
capacitance of the input nodes. If the 2pF typical input
nodes are driven, the LT1715 will respond.
The output speed is constrained by three mechanisms, the
rst of which is the slew currents available from the output
transistors. To maintain low power quiescent operation,
the LT1715 output transistors are sized to deliver 35mA
to 60mA typical slew currents. This is sufcient to drive
small capacitive loads and logic gate inputs at extremely
high speeds. But the slew rate will slow dramatically with
heavy capacitive loads. Because the propagation delay (tPD)
denition ends at the time the output voltage is halfway
between the supplies, the xed slew current makes the
LT1715 faster at 3V than 5V with large capacitive loads
and sufcient input overdrive.
Another manifestation of this output speed limit is skew,
the difference between tPD+ and tPD–. The slew currents
of the LT1715 vary with the process variations of the PNP
and NPN transistors, for rising edges and falling edges
respectively. The typical 0.5ns skew can have either polar-
ity, rising edge or falling edge faster. Again, the skew will
increase dramatically with heavy capacitive loads.
A nal limit to output speed is the turn-on and turn-off
time of the output devices. Each device has substantial
base charge that requires one nanosecond or more of
active charging or discharging by the bias current of
the Darlington driver stage. When toggle rates are high
enough that insufcient time is allowed for this turn-on
or turn-off, glitches may occur leading to dropout or runt
pulses. Furthermore, power consumption may increase
nonlinearly if devices are not turned off before the oppos-
ing cycle. However, once the toggle frequency increases
or decreases, the part will easily leave this undesired
operating mode no worse for the wear provided there
is adequate heat sinking toprevent thermal overload. At
frequencies well beyond the maximum toggle rate, the part
will toggle with limited output swing and well controlled
power consumption.
The internal speed limits manifest themselves as disper-
sion. All comparators have some degree of dispersion,
dened as a change in propagation delay versus input
overdrive. The propagation delay of the LT1715 will vary
with overdrive, from a typical of 4ns at 20mV overdrive
to 6ns at 5mV overdrive (typical). The LT1715’s primary
source of dispersion is the hysteresis stage. As a change
of polarity arrives at the gain stage, the positive feedback
of the hysteresis stage subtracts from the overdrive avail-
able. Only when enough time has elapsed for a signal to
propagate forward through the gain stage, backwards
through the hysteresis path and forward through the gain
stage again, will the output stage receive the same level
of overdrive that it would have received in the absence of
hysteresis.
The LT1715 is several hundred picoseconds faster when
VEE = –5V, relative to single supply operation. This is due
to the internal speed limit; the gain stage operates between
VEE and +VS, and it is faster with higher reverse voltage
bias due to reduced silicon junction capacitances.
In many applications, as shown in the following examples,
there is plenty of input overdrive. Even in applications pro-
viding low levels of overdrive, the LT1715 is fast enough
that the absolute dispersion of 2ns (= 6 – 4) is often small
enough to ignore.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1715IMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:4ns, 150MHz Dual Comparator with Independent Input/Output Supplies |
| LT1716 | 制造商:LINER 制造商全称:Linear Technology 功能描述:SOT-23, 44V, Over-The-Top, Micropower, Precision Rail-to-Rail Comparator |
| LT1716CS5 | 制造商:Linear Technology 功能描述:Comparator Single R-R O/P ±22V/44V 5-Pin TSOT-23 |
| LT1716CS5#PBF | 制造商:Linear Technology 功能描述:COMPARATOR PRECISION R/R SOT-23-5 制造商:Linear Technology 功能描述:COMPARATOR PRECISION SINGLE 制造商:Linear Technology 功能描述:COMPARATOR, PRECISION R/R, SOT-23-5 制造商:Linear Technology 功能描述:COMPARATOR, PRECISION, SINGLE, TSOT-23-5; Comparator Type:Precision; No. of Comparators:1; Response Time:3s; Supply Voltage Range:2.7V to 44V; Amplifier Case Style:TSOT-23; No. of Pins:5; IC Output Type:Pull Up; Supply Current:40A ;RoHS Compliant: Yes |
| LT1716CS5#TR | 功能描述:IC COMP OTT R-R 44V TSOT-23-5 RoHS:否 类别:集成电路 (IC) >> 线性 - 比较器 系列:Over-The-Top® 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS，开路漏极，TTL 电压 - 电源，单路/双路(±):2 V ~ 11 V，±1 V ~ 5.5 V 电压 - 输入偏移（最小值）:10mV @ 5V 电流 - 输入偏压（最小值）:- 电流 - 输出（标准）:0.015mA @ 5V 电流 - 静态（最大值）:8.5µA CMRR, PSRR（标准）:80dB CMRR，80dB PSRR 传输延迟（最大）:12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP（0.300"，7.62mm） 安装类型:通孔 包装:管件 |
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