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LT1228MJ8#PBF

更新时间： 2024-11-01 21:07:59
品牌 Logo 应用领域
凌特 - Linear 放大器商用集成电路
页数 文件大小 规格书
20页 406K
描述
IC 1 CHANNEL, VIDEO AMPLIFIER, CDIP8, 0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8, Audio/Video Amplifier

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LT1228MJ8#PBF 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：DIP包装说明：0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8
针数：8Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.12商用集成电路类型：VIDEO AMPLIFIER
谐波失真：0.2%JESD-30 代码：R-CDIP-T8
信道数量：1功能数量：1
端子数量：8最高工作温度：125 °C
最低工作温度：-55 °C封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：DIP封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：5.08 mm
最大供电电压 (Vsup)：15 V最小供电电压 (Vsup)：2 V
表面贴装：NO温度等级：MILITARY
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

LT1228MJ8#PBF 数据手册

 浏览型号LT1228MJ8#PBF的Datasheet PDF文件第2页浏览型号LT1228MJ8#PBF的Datasheet PDF文件第3页浏览型号LT1228MJ8#PBF的Datasheet PDF文件第4页浏览型号LT1228MJ8#PBF的Datasheet PDF文件第5页浏览型号LT1228MJ8#PBF的Datasheet PDF文件第6页浏览型号LT1228MJ8#PBF的Datasheet PDF文件第7页 
LT1228  
100MHz Current Feedback  
Amplifier with DC Gain Control  
U
FEATURES  
DESCRIPTIO  
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  
combines both amplifiers into an 8-pin package, and  
operates on any supply voltage from 4V (± 2V) to 30V  
(±15V). A complete differential input, gain controlled  
amplifier can be implemented with the LT1228 and just a  
few resistors.  
■
Very Fast Transconductance Amplifier  
Bandwidth: 75MHz  
gm = 10 × ISET  
Low THD: 0.2% at 30mVRMS Input  
Wide ISET Range: 1µA to 1mA  
■
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: 25MΩ, 6pF  
■
Wide Supply Range: ±2V to ±15V  
The LT1228 transconductance amplifier has a high imped-  
ancedifferentialinputandacurrentsourceoutputwithwide  
output voltage compliance. The transconductance, gm, is  
setbythecurrentthatflowsintoPin5, ISET. Thesmallsignal  
gm isequaltotentimesthevalueofISETandthisrelationship  
holds over several decades of set current. The voltage at Pin  
5 is two diode drops above the negative supply, Pin 4.  
■
Inputs Common Mode to Within 1.5V of Supplies  
■
Outputs Swing Within 0.8V of Supplies  
Supply Current: 7mA  
■
■
Available in 8-Lead PDIP and SOIC Packages  
U
APPLICATIO S  
■
Video DC Restore (Clamp) Circuits  
■
The LT1228 current feedback amplifier has very high input  
impedance and therefore it is an excellent buffer for the  
output of the transconductance amplifier. The current feed-  
back amplifier maintains its wide bandwidth over a wide  
range of voltage gains making it easy to interface the  
transconductance amplifier output to other circuitry. The  
current feedback amplifier is designed to drive low imped-  
ance loads, such as cables, with excellent linearity at high  
frequencies.  
Video Differential Input Amplifiers  
■
Video Keyer/Fader Amplifiers  
■
AGC Amplifiers  
■
Tunable Filters  
■
Oscillators  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
Frequency Response  
TYPICAL APPLICATIO  
6
V
= ±15V  
= 100Ω  
S
L
Differential Input Variable Gain Amp  
R
3
0
I
= 1mA  
15V  
SET  
4.7µF  
+
–3  
R3A  
10k  
7
4
3
2
–6  
+
–
+
1
8
–9  
g
R2A  
10k  
V
m
+
–
IN  
I
I
= 300µA  
SET  
6
–12  
–15  
–18  
–
5
CFA  
V
OUT  
I
SET  
R
–15V  
R2  
F
470Ω  
= 100µA  
R4  
1.24k  
R5  
10k  
SET  
R3  
100Ω  
–21  
–24  
4.7µF  
+
100Ω  
R1  
270Ω  
R
G
HIGH INPUT RESISTANCE  
EVEN WHEN POWER IS OFF  
–18dB < GAIN < 2dB  
10Ω  
100k  
1M  
10M  
100M  
R6  
6.19k  
V
≤ 3V  
RMS  
FREQUENCY (Hz)  
IN  
LT1228 • TA02  
LT1228 • TA01  
1228fc  
1
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