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| 型号： | ADCMP552BRQZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR PECL/LVPECL 20QSOP |
| 标准包装： | 56 |
| 类型： | 带锁销 |
| 元件数： | 1 |
| 输出类型： | 补充型，差分，LVPECL，开路发射极，PECL |
| 电压 - 电源，单路/双路(±)： | 3.14 V ~ 5.25 V |
| 电压 - 输入偏移（最小值）： | 10mV @ 3.3V |
| 电流 - 输入偏压（最小值）： | 28µA @ 3.3V |
| 电流 - 输出（标准）： | 55mA @ 3.3V |
| 电流 - 静态（最大值）： | 17mA |
| CMRR, PSRR（标准）： | 76dB CMRR，75dB PSRR |
| 传输延迟（最大）： | 0.625ns |
| 磁滞： | ± 0.5mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
| 产品目录页面： | 764 (CN2011-ZH PDF) |
| 配用： | EVAL-ADCMP552BRQZ-ND - BOARD EVALUATION ADCMP552BRQZ |
ADCMP551/ADCMP552/ADCMP553
Data Sheet
Rev. A | Page 12 of 16
Figure 18. Propagation Delay Dispersion
COMPARATOR HYSTERESIS
The addition of hysteresis to a comparator is often useful in a
noisy environment or where it is not desirable for the
comparator to toggle between states when the input signal is at
the switching threshold. The transfer function for a comparator
with hysteresis is shown in Figure 19. If the input voltage
approaches the threshold from the negative direction, the
comparator switches from a 0 to a 1 when the input crosses
+VH/2. The new switching threshold becomes VH/2. The
comparator remains in a 1 state until the VH/2 threshold is
crossed coming from the positive direction. In this manner,
noise centered on 0 V input does not cause the comparator to
switch states unless it exceeds the region bounded by ±VH/2.
Positive feedback from the output to the input is often used to
produce hysteresis in a comparator (Figure 23). The major
problem with this approach is that the amount of hysteresis
varies with the output logic levels, resulting in a hysteresis that
is not symmetrical around zero.
In the ADCMP552, hysteresis is generated through the
programmable hysteresis pin. A resistor from the HYS pin to
VCCI creates a current into the part that is used to generate
hysteresis. Hysteresis generated in this manner is independent
of output swing and is symmetrical around the trip point. The
hysteresis versus resistance curve is shown in Figure 20.
A current source can also be used with the HYS pin. The
relationship between the current applied to the HYS pin and the
resulting hysteresis is shown in Figure 16.
Figure 19. Comparator Hysteresis Transfer Function
Figure 20. Comparator Hysteresis Transfer Function
MINIMUM INPUT SLEW RATE REQUIREMENT
As for all high speed comparators, a minimum slew rate must
be met to ensure that the device does not oscillate when the
input crosses the threshold. This oscillation is due in part to the
high input bandwidth of the comparator and the parasitics of
the package. Analog Devices recommends a slew rate of 1 V/s
or faster to ensure a clean output transition. If slew rates less
than 1 V/s are used, hysteresis should be added to reduce the
oscillation.
Q OUTPUT
INPUT VOLTAGE
1.5V OVERDRIVE
20mV OVERDRIVE
DISPERSION
VREF ± VOS
04722-017
OUTPUT
INPUT
0
1
0V
–VH
2
+VH
2
04722-018
120
100
80
60
40
20
0
100
10
1
04722-019
RHYS (k)
PROGRAMMED
HYSTERESIS
(mV)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADCMP553 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Supply, High Speed PECL/LVPECL Comparators |
| ADCMP553BRM | 制造商:Analog Devices 功能描述:Comparator Single 5.25V 8-Pin MSOP 制造商:Analog Devices 功能描述:COMPARATOR SGL 5.25V 8MSOP - Rail/Tube 制造商:Analog Devices 功能描述:3.3V to 5V 1 0.75ns Rp[^ 8MSOP Tube 制造商:Analog Devices 功能描述:IC COMPARATOR HIGH SPEED |
| ADCMP553BRMZ | 功能描述:IC COMPARATOR PECL/LVPECL 8MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:1 系列:- 类型:通用 元件数:1 输出类型:CMOS，开路集电极，TTL 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V 电压 - 输入偏移（最小值）:7mV @ 5V 电流 - 输入偏压（最小值）:0.25µA @ 5V 电流 - 输出（标准）:84mA @ 5V 电流 - 静态（最大值）:120µA CMRR, PSRR（标准）:- 传输延迟（最大）:600ns 磁滞:- 工作温度:-40°C ~ 85°C 封装/外壳:SC-74A，SOT-753 安装类型:表面贴装 包装:剪切带 (CT) 产品目录页面:1268 (CN2011-ZH PDF) 其它名称:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| ADCMP553BRMZ | 制造商:Analog Devices 功能描述:IC, HIGH SPEED COMP, SINGLE, 500PS MSOP8 |
| ADCMP561 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual High Speed PECL Comparators |
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