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參數資料
| 型號： | ADCMP603BCPZ-WP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Rail-to-Rail, Very Fast, 2.5 V to 5.5 V, Single-Supply TTL/CMOS Comparator |
| 中文描述： | COMPARATOR, 5000 uV OFFSET-MAX, 5000 ns RESPONSE TIME, QCC12 |
| 封裝： | 3 X 3 MM, LEAD FREE, MO-220VEED-1, LFCSP-12 |
| 文件頁數： | 11/16頁 |
| 文件大小： | 267K |
| 代理商： | ADCMP603BCPZ-WP |
ADCMP603
OPTIMIZING PERFORMANCE
As with any high speed comparator, proper design and layout
techniques are essential for obtaining the specified performance.
Stray capacitance, inductance, inductive power and ground
impedances, or other layout issues can severely limit performance
and often cause oscillation. Large discontinuities along input
and output transmission lines can also limit the specified pulse-
width dispersion performance. The source impedance should
be minimized as much as is practicable. High source impedance,
in combination with the parasitic input capacitance of the
comparator, causes an undesirable degradation in bandwidth at
the input, thus degrading the overall response. Thermal noise
from large resistances can easily cause extra jitter with slowly
slewing input signals; higher impedances encourage undesired
coupling.
COMPARATOR PROPAGATION
DELAY DISPERSION
The ADCMP603 comparator is designed to reduce propagation
delay dispersion over a wide input overdrive range of 5 mV to
V
propagation delay that results from a change in the degree of
overdrive or slew rate (that is, how far or how fast the input
signal exceeds the switching threshold).
Propagation delay dispersion is a specification that becomes
important in high speed, time-critical applications, such as data
communication, automatic test and measurement, and instru-
mentation. It is also important in event-driven applications, such
as pulse spectroscopy, nuclear instrumentation, and medical
imaging. Dispersion is defined as the variation in propagation
delay as the input overdrive conditions are changed (Figure 15
and Figure 16).
ADCMP603 dispersion is typically < 2 ns as the overdrive varies
from 10 mV to 125 mV. This specification applies to both
positive and negative signals because the device has very closely
matched delays for both positive-going and negative-going
inputs.
Rev. 0 | Page 11 of 16
Q/Q OUTPUT
INPUT VOLTAGE
10V/ns
1V/ns
DISPERSION
V
N
± V
OS
0
Figure 16. Propagation Delay—Slew Rate Dispersion
COMPARATOR HYSTERESIS
The addition of hysteresis to a comparator is often desirable in a
noisy environment, or when the differential input amplitudes
are relatively small or slow moving. Figure 17 shows the transfer
function for a comparator with hysteresis. As the input voltage
approaches the threshold (0.0 V, in this example) from below
the threshold region in a positive direction, the comparator
switches from low to high when the input crosses +V
new switching threshold becomes V
H
/2. The comparator remains
in the high state until the new threshold, V
below the threshold region in a negative direction. In this manner,
noise or feedback output signals centered on 0.0 V input cannot
cause the comparator to switch states unless it exceeds the region
bounded by ±V
H
/2.
H
/2, and the
CCI
– 1 V. Propagation delay dispersion is the variation in
H
/2, is crossed from
OUTPUT
INPUT
0
V
OL
V
OH
+V
H
2
–V
H
2
0
Figure 17. Comparator Hysteresis Transfer Function
Q/Q OUTPUT
INPUT VOLTAGE
500mV OVERDRIVE
10mV OVERDRIVE
DISPERSION
V
N
± V
OS
0
The customary technique for introducing hysteresis into a
comparator uses positive feedback from the output back to the
input. One limitation of this approach is that the amount of
hysteresis varies with the output logic levels, resulting in
hysteresis that is not symmetric about the threshold. The
external feedback network can also introduce significant
parasitics that reduce high speed performance and induce
oscillation in some cases.
Figure 15. Propagation Delay—Overdrive Dispersion
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相關代理商/技術參數 |
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|---|---|
| ADCMP604 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Rail-to-Rail, Very Fast, 2.5 V to 5.5 V, Single-Supply LVDS Comparators |
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| ADCMP604BKSZ | 制造商:Analog Devices 功能描述:COMPARATOR SGL R-R I/P 5.5V 6PIN SC-70 - Bulk |
| ADCMP604BKSZ-R2 | 功能描述:IC COMP TTL/CMOS 1CHAN SC70-6 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: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（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) 產品目錄頁面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| ADCMP604BKSZ-R21 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Rail-to-Rail, Very Fast, 2.5 V to 5.5 V, Single-Supply LVDS Comparators |
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