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參數(shù)資料
| 型號： | ADCMP562BRQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Dual High Speed PECL Comparators |
| 中文描述： | COMPARATOR, 10000 uV OFFSET-MAX, PDSO20 |
| 封裝： | MO-137AD, QSOP-20 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 335K |
| 代理商： | ADCMP562BRQ |
ADCMP561/ADCMP562
Propagation delay dispersion is a specification that is important
in critical timing applications such as ATE, bench instruments,
and nuclear instrumentation. Overdrive dispersion is defined
as the variation in propagation delay as the input overdrive
conditions are changed (Figure 19). For the ADCMP561 and
ADCMP562, overdrive dispersion is typically 75 ps as the
overdrive is changed from 100 mV to 1.5 V. This specification
applies for both positive and negative overdrive because the
ADCMP561/ADCMP562 have equal delays for positive and
negative going inputs.
Rev. A | Page 12 of 16
Q OUTPUT
INPUT VOLTAGE
1.5V OVERDRIVE
20mV OVERDRIVE
DISPERSION
V
REF
± V
OS
0
Figure 19. 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 20. If the input voltage
approaches the threshold from the negative direction, the
comparator switches from a 0 to a 1 when the input crosses
+V
H
/2. The new switching threshold becomes V
H
/2. The
comparator remains in a 1 state until the threshold V
H
/2 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 ±V
H
/2.
Positive feedback from the output to the input is often used to
produce hysteresis in a comparator (Figure 24). 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 ADCMP562, hysteresis is generated through the
programmable hysteresis pin. A resistor from the HYS pin to
GND 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 21.
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 17.
OUTPUT
INPUT
0
1
0V
–V
H
2
+V
H
2
0
Figure 20. Comparator Hysteresis Transfer Function
160
140
120
100
80
60
40
20
0
0
10
20
30
40
50
0
R
HYS
(k
)
P
Figure 21. Comparator Hysteresis vs. R
HYS
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/μs
or faster to ensure a clean output transition. If slew rates less
than 1 V/μs are used, hysteresis should be added to reduce the
oscillation.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADCMP562BRQZ | 功能描述:IC COMPARATOR PECL DUAL 20-QSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:1 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，開路集電極，TTL 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:7mV @ 5V 電流 - 輸入偏壓（最小值）:0.25µA @ 5V 電流 - 輸出（標準）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標準）:- 傳輸延遲（最大）:600ns 磁滯:- 工作溫度:-40°C ~ 85°C 封裝/外殼:SC-74A，SOT-753 安裝類型:表面貼裝 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| ADCMP562BRQZ-RL7 | 功能描述:IC COMPARATOR PECL DUAL 20QSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，滿擺幅，TTL 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 電壓 - 輸入偏移（最小值）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
| ADCMP563 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual High Speed ECL Comparators |
| ADCMP563_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual, High Speed ECL Comparators |
| ADCMP563BCP-R2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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