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參數(shù)資料
| 型號(hào)： | LT1394IS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 7ns, Low Power, Single Supply, Ground-Sensing Comparator |
| 中文描述： | COMPARATOR, 4000 uV OFFSET-MAX, 7 ns RESPONSE TIME, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大小： | 213K |
| 代理商： | LT1394IS8 |
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14
LT1394
High Speed Adaptive Trigger Circuit
Line and fibre-optic receivers often require an adaptive
trigger to compensate for variations in signal amplitude
and DC offsets. The circuit in Figure 18 triggers on 2mV to
175mV signals from 100Hz to 45MHz while operating from
a single 5V rail. A1, operating at a gain of 15, provides
wideband AC gain. The output of this stage biases a 2-way
peak detector (Q1 through Q4). The maximum peak is
stored in Q2’s emitter capacitor, while the minimum excur-
sion is retained in Q4’s emitter capacitor. The DC value of
the midpoint of A1’s output signal appears at the junction
of the 500pF capacitor and the 3M
units. This point
always sits midway between the signal’s excursions,
egardless of absolute amplitude. This signal-adaptive volt-
age is buffered by A2 to set the trigger voltage at the
LT1394’s positive input. The LT1394’s negative input is
biased directly from A1’s output. The LT1394’s output, the
circuit’s output, is unaffected by >85:1 signal amplitude
variations. Bandwidth limiting in A1 does not affect trigger-
ing because the adaptive trigger threshold varies
ratiometrically to maintain circuit output.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Figure 19 shows operating waveforms at 45MHz. Trace A’s
input produces Trace B’s amplified output at A1. The
comparator’s output is Trace C.
Split supply versions of this circuit can achieve band-
widths to 50MHz with wider input operating range.
A = 0.1V/DIV
B = 0.1V/DIV
C = 5V/DIV
50ns/DIV
AN72 F64
Figure 19. Adaptive Trigger Responding to a 40MHz,
5mV Input. Input Amplitude Variations from 2mV to
175mV Are Accommodated
5V
–
+
A1
LT1227
–
+
A2
LT1006
INPUT
5V
5V
5V
TRIGGER
OUT
1394 F18
500pF
0.1
μ
F
510
470
470
750
36
1
3
2
4
14
13
15
5
6
12
10
11
2k
10
μ
F
2k
2k
+
0.1
μ
F
0.1
μ
F
0.005
μ
F
0.005
μ
F
100
μ
F
+
Q1, Q2, Q3, Q4 = CA3096 ARRAY:
TIE SUBSTRATE (PIN 16) TO GROUND
= 1N4148
–
+
LT1394
Q1
Q2
Q3
Q4
3M
3M
Figure 18. 45MHz Single Supply Adaptive Trigger. Output Comparator’s
Threshold Varies Ratiometrically with Input Amplitude, Maintaining Data
Integrity over >85:1 Input Amplitude Range
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PDF描述 |
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| LT1394CS8 | 7ns, Low Power, Single Supply, Ground-Sensing Comparator |
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| LT1395CS8 | Single/Dual/Quad 400MHz Current Feedback Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1394IS8#PBF | 功能描述:IC COMPARATOR LOW PWR 7NS 8-SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:UltraFast™ 標(biāo)準(zhǔn)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(biāo)準(zhǔn)）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標(biāo)準(zhǔn)）:- 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(yè)面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| LT1394IS8#TR | 功能描述:IC COMPARATOR 7NS LOW PWR 8SOIC 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 |
| LT1394IS8#TRPBF | 功能描述:IC COMPARATOR LOW PWR 7NS 8-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 |
| LT1395 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single/Dual/Quad 400MHz Current Feedback Amplifier |
| LT1395_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single/Dual/Quad 400MHz Current Feedback Amplifier |
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