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| 型号： | LT1719CS8 |
| 厂商： | Linear Technology |
| 文件页数： | 15/22页 |
| 文件大小： | 0K |
| 描述： | IC COMP R-R I/O SGL 3/5V 8-SOIC |
| 标准包装： | 100 |
| 系列： | UltraFast™ |
| 类型： | 通用 |
| 元件数： | 1 |
| 输出类型： | CMOS，满摆幅，TTL |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 6 V |
| 电压 - 输入偏移（最小值）： | 2.5mV @ ±5V |
| 电流 - 输入偏压（最小值）： | 6µA @ ±5V |
| 电流 - 输出（标准）： | 20mA |
| 电流 - 静态（最大值）： | 9mA |
| CMRR, PSRR（标准）： | 70dB CMRR，80dB PSRR |
| 传输延迟（最大）： | 4.2ns |
| 磁滞： | 7mV |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
| 其它名称： | Q1357287 |
LT1719
22
1719fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2000
LT 0809 REV A PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER
DESCRIPTION
COMMENTS
LT1016
UltraFast Precision Comparator
Industry Standard 10ns Comparator
LT1116
12ns Single Supply Ground-Sensing Comparator
Single Supply Version of LT1016
LT1394
7ns, UltraFast, Single Supply Comparator
6mA Single Supply Comparator
LT1671
60ns, Low Power, Single Supply Comparator
450μA Single Supply Comparator
LT1713/LT1714
Single/Dual 7ns, Rail-to-Rail Comparator
Rail-to-Rail Inputs and Outputs
LT1720/LT1721
Dual/Quad 4.5ns, Single Supply 3V/5V Comparator
Dual/Quad Comparator Similar to the LT1719
High Performance Sine Wave
to Square Wave Converter
Propagation delay of comparators is typically specied for
a 100mV step with some fraction of that for overdrive. But
in many signal processing applications, such as in com-
munications, the goal is to convert a sine wave, such as
a carrier, to a square wave for use as a timing clock. The
desired behavior is for the output timing to be dependent
on the input timing only. No phase shift should occur as
a function of the input amplitude, which would result in
AM to FM conversion.
The circuit of Figure 9a is a simple LT1719S8-based sine
wave to square wave converter. The ± 5V supplies on the
input allow very large swing inputs, while the 3V logic
supply keeps the output swing small to minimize cross
talk. Figure 9b shows the time delay vs input amplitude
with a 10MHz sine wave. The LT1719 delay changes just
0.65ns over the 26dB amplitude range; 2.33° at 10MHz.
The delay is particularly at yielding excellent AM rejection
Figure 9a. LT1719-Based Sine Wave to Square Wave Converter
from 0dBm to 15dBm. If a 2:1 transformer is used to drive
the input differentially, this exceptionally at zone spans
–5dBm to 10dBm, a common range for RF signal levels.
Similar delay performance is achieved with input frequen-
cies as high as 50MHz. There is, however, some additional
encroachment into the central at zone by both the small
amplitude and large amplitude variations.
With small input signals, the hysteresis and dispersion
make the LT1719 act like a comparator with a 12mV
hysteresis span. In other words, a 12mVP-P sine wave at
10MHz will barely toggle the LT1719, with 90° of phase
lag or 25ns additional delay.
Above 5VP-P at 10MHz, the LT1719 delay starts to decrease
due to internal capacitive feed-forward in the input stage.
Unlike some comparators, the LT1719 will not falsely an-
ticipate a change in input polarity, but the feed-forward is
enough to make a transition propagate through the LT1719
faster once the input polarity does change.
–
+
LT1719S8
50Ω
1719 F09a
SINE WAVE
INPUT
SQUARE WAVE
OUTPUT
5V
–5V
3V
INPUT AMPLITUDE (dBm)
–5
0
TIME
DELAY
(ns)
1
2
3
4
5
0
510
15
1719 F09b
20
25
632mVP-P
2VP-P
6.32VP-P
25°C
VCC = 5V
VEE = –5V
+VS = 3V
10MHz
Figure 9b. Time Delay vs Sine Wave Input Amplitude
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1719CS8#PBF | 功能描述:IC COMP R-R I/O SGL 3/5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:UltraFast™ 标准包装:1 系列:- 类型:通用 元件数:1 输出类型:CMOS，开路集电极，TTL 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V 电压 - 输入偏移（最小值）:7mV @ 5V 电流 - 输入偏压（最小值）:0.25µA @ 5V 电流 - 输出（标准）:84mA @ 5V 电流 - 静态（最大值）:120µA CMRR, PSRR（标准）:- 传输延迟（最大）:600ns 磁滞:- 工作温度:-40°C ~ 85°C 封装/外壳:SC-74A，SOT-753 安装类型:表面贴装 包装:剪切带 (CT) 产品目录页面:1268 (CN2011-ZH PDF) 其它名称:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| LT1719CS8#TR | 功能描述:IC COMP R-R SINGLE 4.5NS 8SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 比较器 系列:UltraFast™ 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS，开路漏极，TTL 电压 - 电源，单路/双路(±):2 V ~ 11 V，±1 V ~ 5.5 V 电压 - 输入偏移（最小值）:10mV @ 5V 电流 - 输入偏压（最小值）:- 电流 - 输出（标准）:0.015mA @ 5V 电流 - 静态（最大值）:8.5µA CMRR, PSRR（标准）:80dB CMRR，80dB PSRR 传输延迟（最大）:12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP（0.300"，7.62mm） 安装类型:通孔 包装:管件 |
| LT1719CS8#TRPBF | 功能描述:IC COMP R-R I/O SGL 3/5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:UltraFast™ 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS，开路漏极，TTL 电压 - 电源，单路/双路(±):2 V ~ 11 V，±1 V ~ 5.5 V 电压 - 输入偏移（最小值）:10mV @ 5V 电流 - 输入偏压（最小值）:- 电流 - 输出（标准）:0.015mA @ 5V 电流 - 静态（最大值）:8.5µA CMRR, PSRR（标准）:80dB CMRR，80dB PSRR 传输延迟（最大）:12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP（0.300"，7.62mm） 安装类型:通孔 包装:管件 |
| LT1719CS8PBF | 制造商:Linear Technology 功能描述:LT1719 4.5ns LP SOIC comparator |
| LT1719IS6 | 制造商:Linear Technology 功能描述:Comparator Single R-R O/P |
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