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參數(shù)資料
| 型號： | LT1714CGN#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMP R-R I/O DUAL LP 16SSOP |
| 標(biāo)準包裝： | 2,500 |
| 系列： | UltraFast™ |
| 類型： | 帶鎖銷 |
| 元件數(shù)： | 2 |
| 輸出類型： | CMOS，補充型，滿擺幅，TTL |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 12 V，±2.4 V ~ 6 V |
| 電壓 - 輸入偏移（最小值）： | 4mV @ 5V |
| 電流 - 輸入偏壓（最小值）： | 2µA @ 5V |
| 電流 - 輸出（標(biāo)準）： | 20mA |
| 電流 - 靜態(tài)（最大值）： | 7.5mA |
| CMRR, PSRR（標(biāo)準）： | 70dB CMRR，80dB PSRR |
| 傳輸延遲（最大）： | 11ns |
| 磁滯： | 100mV |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
12
LT1713/LT1714
TYPICAL APPLICATIO S
U
Figure 4. Performance of Figure 3’s Circuit When
Operated Unidirectionally. Eye is Wide Open
171112 F04
Figure 5. Performance When Operated Simultaneous
Bidirectionally (Full Duplex). Crosstalk Appears as Noise.
Eye is Slightly Shut But Performance is Still Excellent
171112 F05
This amounts to an attenuation factor of 0.0978 with the
values shown. (The actual voltage on the lines will be cut
in half again due to the 120
ZO.) The reason this
attenuation factor is important is that it is the key to
deciding the ratio between the R2-R3 resistor divider in
the receiver path. This divider allows the receiver to reject
the large signal of the local transmitter and instead sense
the attenuated signal of the remote transmitter. Note that
in the above equations, R2 and R3 are not yet fully
determined because they only appear as a sum. This
allows the designer to now place an additional constraint
on their values. The R2-R3 divide ratio should be set to
equal half the attenuation factor mentioned above or:
R3/R2 = 1/2 0.09761.
Having already designed R2 + R3 to be 2.653k (by allocat-
ing input impedance across RO, R1 and R2 + R3 to get the
requisite 120
), R2 and R3 then become 2529 and
123.5
respectively. The nearest 1% value for R2 is 2.55k
and that for R3 is 124
.
Voltage-Tunable Crystal Oscillator
The front page application is a variant of a basic crystal
oscillator that permits voltage tuning of the output fre-
quency. Such voltage-controlled crystal oscillators (VCXO)
are often employed where slight variation of a stable
carrier is required. This example is specifically intended to
provide a 4
× NTSC sub-carrier tunable oscillator suitable
for phase locking.
The LT1713 is set up as a crystal oscillator. The varactor
diode is biased from the tuning input. The tuning network
is arranged so a 0V to 5V drive provides a reasonably
symmetric, broad tuning range around the 14.31818MHz
center frequency. The indicated selected capacitor sets
tuning bandwidth. It should be picked to complement loop
response in phase locking applications. Figure 6 is a plot
of tuning input voltage versus frequency deviation. Tuning
deviation from the 4
× NTSC 14.31818MHz center fre-
quency exceeds
±240ppm for a 0V to 5V input.
1 Using the design value of R2 + R3 = 2.653k rather than the implementation value of 2.55k +
124
= 2.674k.
INPUT VOLTAGE (V)
0
FREQUENCY
DEVIATION
(kHz)
2
4
5
9
8
7
6
5
4
3
2
1
0
171112 F06
13
14.314.0MHz
14.31818MHz
14.3217MHz
Figure 6. Control Voltage vs Output Frequency for the First Page
Application Circuit. Tuning Deviation from Center Frequency
Exceeds
±240ppm
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| LT1714IGN | 功能描述:IC COMP R-RINOUT DUAL 16-SSOP 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）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標(biāo)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 |
| LT1714IGN#PBF | 功能描述:IC COMP R-RINOUT DUAL 16-SSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:UltraFast™ 標(biāo)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(biāo)準）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標(biāo)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 |
| LT1714IGN#PBF | 制造商:Linear Technology 功能描述:IC,VOLT COMPARATOR,DUAL,BIPOLAR,SSOP,16P |
| LT1714IGN#TR | 功能描述:IC COMP R-R I/O DUAL LP 16SSOP 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）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標(biāo)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 |
| LT1714IGN#TRPBF | 功能描述:IC COMP R-RINOUT DUAL 16-SSOP 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）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標(biāo)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 |
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