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LT1251CN#PBF PDF预览

LT1251CN#PBF

更新时间： 2024-01-01 13:46:19
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
22页 660K
描述
LT1251 - 40MHz Video Fader and DC Gain Controlled Amplifier; Package: PDIP; Pins: 14; Temperature Range: 0°C to 70°C

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LT1251CN#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SOIC包装说明：SOP,
针数：14Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.18放大器类型：OPERATIONAL AMPLIFIER
标称共模抑制比：57 dB最大输入失调电压：3000 µV
JESD-30 代码：R-PDSO-G14JESD-609代码：e3
长度：8.65 mm湿度敏感等级：1
负供电电压上限：-16 V标称负供电电压 (Vsup)：-5 V
功能数量：1端子数量：14
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm标称压摆率：300 V/us
子类别：Operational Amplifier供电电压上限：16 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30标称均一增益带宽：40000 kHz
宽度：3.9 mmBase Number Matches：1

LT1251CN#PBF 数据手册

 浏览型号LT1251CN#PBF的Datasheet PDF文件第2页浏览型号LT1251CN#PBF的Datasheet PDF文件第3页浏览型号LT1251CN#PBF的Datasheet PDF文件第4页浏览型号LT1251CN#PBF的Datasheet PDF文件第5页浏览型号LT1251CN#PBF的Datasheet PDF文件第6页浏览型号LT1251CN#PBF的Datasheet PDF文件第7页 
LT1228  
100MHz Current Feedback  
Amplifier with DC Gain Control  
FEATURES  
DESCRIPTION  
The LT®1228 makes it easy to electronically control the  
gain of signals from DC to video frequencies. The LT1228  
implements gain control with a transconductance ampli-  
fier (voltage to current) whose gain is proportional to an  
externally controlled current. A resistor is typically used  
to convert the output current to a voltage, which is then  
amplified with a current feedback amplifier. The LT1228  
combinesbothamplifiersintoan8-pinpackage, andoper-  
ates on any supply voltage from 4V ( 2V) to 30V ( 1ꢀV).  
A complete differential input, gain controlled amplifier can  
be implemented with the LT1228 and just a few resistors.  
n
Very Fast Transconductance Amplifier  
Bandwidth: 7ꢀMHz  
g = 10 × I  
m
SET  
Low THD: 0.2% at 30mV  
Input  
RMS  
Wide I Range: 1µA to 1mA  
SET  
n
Very Fast Current Feedback Amplifier  
Bandwidth: 100MHz  
Slew Rate: 1000V/µs  
Output Drive Current: 30mA  
Differential Gain: 0.04%  
Differential Phase: 0.1°  
High Input Impedance: 2ꢀMΩ, 6pF  
Wide Supply Range: 2V to 1ꢀV  
Inputs Common Mode to Within 1.ꢀV of Supplies  
Outputs Swing Within 0.8V of Supplies  
Supply Current: 7mA  
TheLT1228transconductanceamplifierhasahighimped-  
ancedifferentialinputandacurrentsourceoutputwithwide  
n
n
n
n
n
output voltage compliance. The transconductance, g , is  
m
setbythecurrentthatflowsintoPinꢀ,I .Thesmallsignal  
SET  
g isequaltotentimesthevalueofI andthisrelationship  
m
SET  
Available in 8-Lead PDIP and SO Packages  
holds over several decades of set current. The voltage at  
Pin ꢀ is two diode drops above the negative supply, Pin 4.  
APPLICATIONS  
TheLT1228currentfeedbackamplifierhasveryhighinput  
impedanceandthereforeitisanexcellentbufferfortheout-  
putofthetransconductanceamplifier.Thecurrentfeedback  
amplifiermaintainsitswidebandwidthoverawiderangeof  
voltage gains making it easy to interface the transconduc-  
tance amplifier output to other circuitry. The current feed-  
back amplifier is designed to drive low impedance loads,  
suchascables,withexcellentlinearityathighfrequencies.  
n
Video DC Restore (Clamp) Circuits  
n
Video Differential Input Amplifiers  
n
Video Keyer/Fader Amplifiers  
n
AGC Amplifiers  
n
Tunable Filters  
n
Oscillators  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Frequency Response  
6
Differential Input Variable Gain Amp  
V
=
15V  
S
L
R
= 100Ω  
3
0
15V  
4.7µF  
I
= 1mA  
SET  
+
R3A  
–3  
10k  
7
4
3
2
+
–
+
–6  
1
8
g
R2A  
10k  
V
m
+
–
IN  
–9  
6
I
I
= 300µA  
SET  
V
–
5
CFA  
OUT  
–12  
–15  
–18  
I
SET  
R
F
–15V  
R2  
470Ω  
R4  
1.24k  
R5  
R3  
100Ω  
= 100µA  
1M  
4.7µF  
10k  
SET  
+
100Ω  
R1  
270Ω  
R
G
–21  
–24  
HIGH INPUT RESISTANCE  
EVEN WHEN POWER IS OFF  
–18dB < GAIN < 2dB  
10Ω  
R6  
6.19k  
100k  
10M  
100M  
V
≤ 3V  
IN  
RMS  
LT1228 • TA02  
LT1228 • TA01  
FREQUENCY (Hz)  
1228fd  
1
1234567...22

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