- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377712 > LT1720 (Linear Technology Corporation) Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs PDF資料下載
參數(shù)資料
| 型號： | LT1720 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| 中文描述： | 雙/四路，延遲時間為4.5ns，單電源3V/5V與鐵比較到軌輸出 |
| 文件頁數(shù)： | 19/28頁 |
| 文件大?。?/td> | 317K |
| 代理商： | LT1720 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
19
LT1720/LT1721
APPLICATIO
S I
N
FOR
ATIO
U
W
U
t
PULSE
(ns)
t
O
μ
s
14
12
10
8
6
4
2
0
1
100
1000
10000
1720/21 F14
10
MEASURED
EQUATION 1
Figure 14. Log Pulse Stretcher Output Pulse vs Input Pulse
SPLITTER
2V
0V
CIRCUIT OF
FIGURE 12
n FOOT CABLE
1 FOOT CABLE
NANOSECOND
INPUT RANGE
MICROSECOND
OUTPUT RANGE
X
Y
L
t
OUT
(SEE TEXT)
1720/21 F15
Figure 15. RG-58 Cable with Velocity of Propogation = 66%;
Delay at Y = (n – 1) 1.54ns
You don’t need expensive equipment to confirm the actual
overall performance of this circuit. All you need is a
respectable waveform generator (capable of >~100kHz), a
splitter, a variety of cable lengths and a 20MHz or 60MHz
oscilloscope. Split a single pulse source into different
cable lengths and then into the delay detector, feeding the
longer cable into the Y input (see Figure 15). A 6 foot cable
length difference will create a ~9.2ns delay (using 66%
propagation speed RG-58 cable), and should result in
easily measured 1.70
μ
s output pulses. A 12 foot cable
length difference will result in ~18.4ns delay and 2.07
μ
s
output pulses. The difference in the two output pulse
widths is the per-octave response of your circuit (see
equation (3)). Shorter cable length differences can be
used to get a plot of circuit performance down to 1.5ns (if
any), which can then later be used as a lookup reference
when you have moved from quantifying the circuit to using
the circuit. (Note there is a slight aberration in perfor-
mance below 10ns. See Figure 14.) As a final check, feed
the circuit with identical cable lengths and check that it is
not producing any output pulses.
10ns Triple Overlap Generator
The circuit of Figure 16 utilizes an LT1721 to generate
three overlapping outputs whose pulse edges are sepa-
rated by 10ns as shown. The time constant is set by the RC
network on the output of comparator A. Comparator B and
D trip at fixed percentages of the exponential voltage decay
across the capacitor. The 4.22k
feed-forward to the C
comparator’s inverting input keeps the delay differences
the same in each direction despite the exponential nature
of the RC network’s voltage.
There is a 15ns delay to the first edge in both directions,
due to the 4.5ns delay of two LT1721 comparators, plus
6ns delay in the RC network. This starting delay is short-
ened somewhat if the pulse was shorter than 40ns be-
cause the RC network will not have fully settled; however,
the 10ns edge separations stay constant.
The values shown utilize only the lowest 75% of the supply
voltage span, which allows it to work down to 2.7V supply.
The delay differences grow a couple nanoseconds from 5V
to 2.7V supply due to the fixed V
OL
/V
OH
drops which grow
as a percentage at low supply voltage. To keep this effect
to a minimum, the 1k
pull-up on comparator A provides
equal loading in either state.
Fast Waveform Sampler
Figure 17 uses a diode-bridge-type switch for clean, fast
waveform sampling. The diode bridge, because of its
inherent symmetry, provides lower AC errors than other
semiconductor-based switching technologies. This cir-
cuit features 20dB of gain, 10MHz full power bandwidth
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1721 | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| LT1721CGN | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| LT1720CS8 | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| LT1720CMS8 | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
| LT1721IS | Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1720CDD | 功能描述:IC COMP R-R IN/OUT DUAL 8DFN RoHS:否 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 |
| LT1720CDD#PBF | 功能描述:IC COMP R-R IN/OUT DUAL 8DFN 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 |
| LT1720CDD#TR | 功能描述:IC COMPARATOR DUAL HS 3/5V 8-DFN RoHS:否 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 |
| LT1720CDD#TRPBF | 功能描述:IC COMP R-R IN/OUT DUAL 8DFN 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 |
| LT1720CMS8 | 功能描述:IC COMP R-RINOUT DUAL 8-MSOP RoHS:否 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。