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參數(shù)資料
| 型號(hào)： | LT1721IS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| 中文描述： | QUAD COMPARATOR, 4500 uV OFFSET-MAX, 7 ns RESPONSE TIME, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁數(shù)： | 28/28頁 |
| 文件大?。?/td> | 317K |
| 代理商： | LT1721IS |
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LT1720/LT1721
17201f LT/TP 1099 4K PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1998
TYPICAL APPLICATIO
N
U
Pulse Stretcher
For detecting short pulses from a single sensor, a pulse
stretcher is often required. The circuit of Figure 20 acts as
a one-shot, stretching the width of an incoming pulse to a
consistent 100ns. Unlike a logic one-shot, this LT1720-
based circuit requires only 100pV-s of stimulus to trigger.
The circuit works as follows: Comparator C1 functions as
a threshold detector, whereas comparator C2 is config-
ured as a one-shot. The first comparator is prebiased with
a threshold of 8mV to overcome comparator and system
offsets and establish a low output in the absence of an
input signal. An input pulse sends the output of C1 high,
which in turn latches C2’s output high. The output of C2
is fed back to the input of the first comparator, causing
regeneration and latching both outputs high. Timing
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
G
FAX: (408) 434-0507
G
www.linear-tech.com
PART NUMBER
LT1016
LT1116
LT1394
LT1671
LT1719
DESCRIPTION
UltraFast Precision Comparator
12ns Single Supply Ground-Sensing Comparator
7ns, UltraFast, Single Supply Comparator
60ns, Low Power, Single Supply Comparator
4.5ns Single Supply 3V/5V Comparator
COMMENTS
Industry Standard 10ns Comparator
Single Supply Version of LT1016
6mA Single Supply Comparator
450
μ
A Single Supply Comparator
Single Comparator Similar to the LT1720/LT1721
RELATED PARTS
Figure 20. A 1ns Pulse Stretcher
capacitor C now begins charging through R and, at the
end of 100ns, C2 resets low. The output of C1 also goes
low, latching both outputs low. A new pulse at the input
of C1 can now restart the process. Timing capacitor C can
be increased without limit for longer output pulses.
This circuit has an ultimate sensitivity of better than 14mV
with 5ns to 10ns input pulses. It can even detect an
avalanche generated test pulse of just 1ns duration with
sensitivity better than 100mV.
6
It can detect short events
better than the coincidence detector of Figure 14 because
the one-shot is configured to catch just 100mV of upward
movement from C1’s V
OL
, whereas the coincidence
detector’s 3ns specification is based on a full, legitimate
logic high, without the help of a regenerative one-shot.
6
See Linear Technology Application Note 47, Appendix B. This circuit can detect the output of the
pulse generator described after 40dB attenuation.
–
+
–
+
PULSE SOURCE
C1
1/2 LT1720
C2
1/2 LT1720
50
51
6.8k
1N5711
24
15k
R
1k
2k
2k
1720/21 F20
2k
C
100pF
0.01
μ
F
OUTPUT
100ns
5V
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| LT1721IS#PBF | 功能描述:IC COMP R-RINOUT QUAD 16-SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:UltraFast™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(biāo)準(zhǔn)）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標(biāo)準(zhǔn)）: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 |
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| LT1722CS5 | 制造商:Linear Technology 功能描述:OP Amp Single GP ±6.3V/12.6V 5-Pin TSOT-23 |
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