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LT1228CS8

更新时间： 2024-10-31 22:34:23
品牌 Logo 应用领域
凌特 - Linear 运算放大器放大器电路光电二极管
页数 文件大小 规格书
20页 434K
描述
100MHz Current Feedback Amplifier with DC Gain Control

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中文翻译

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LT1228CS8 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SOIC包装说明：SOP,
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.06Is Samacsys：N
放大器类型：OPERATIONAL AMPLIFIER标称共模抑制比：69 dB
最大输入失调电压：15000 µVJESD-30 代码：R-PDSO-G8
JESD-609代码：e0长度：4.9025 mm
湿度敏感等级：1负供电电压上限：-18 V
标称负供电电压 (Vsup)：-5 V功能数量：1
端子数量：8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）：235
认证状态：Not Qualified座面最大高度：1.752 mm
标称压摆率：3500 V/us子类别：Operational Amplifier
供电电压上限：18 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：Tin/Lead (Sn/Pb)
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：20
宽度：3.899 mmBase Number Matches：1

LT1228CS8 数据手册

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LT1228  
100MHz Current Feedback  
Amplifier with DC Gain Control  
U
DESCRIPTIO  
EATURE  
S
F
■
Very Fast Transconductance Amplifier  
Bandwidth: 75MHz  
The LT1228 makes it easy to electronically control the gain  
of signals from DC to video frequencies. The LT1228  
implements gain control with a transconductance amplifier  
(voltage to current) whose gain is proportional to an exter-  
nally 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 oper-  
ates 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.  
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  
Inputs Common Mode to Within 1.5V of Supplies  
Outputs Swing Within 0.8V of Supplies  
Supply Current: 7mA  
The LT1228 transconductance amplifier has a high imped-  
ancedifferentialinputandacurrentsourceoutputwithwide  
output voltage compliance. The transconductance, gm, is  
setbythecurrentthatflowsintopin5, ISET. Thesmallsignal  
gm isequaltotentimesthevalueofISETandthisrelationship  
holdsoverseveraldecadesofsetcurrent. Thevoltageatpin  
5 is two diode drops above the negative supply, pin 4.  
■
■
■
■
O U  
PPLICATI  
S
A
■
■
■
■
■
■
Video DC Restore (Clamp) Circuits  
Video Differential Input Amplifiers  
Video Keyer/Fader Amplifiers  
AGC Amplifiers  
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.  
Tunable Filters  
Oscillators  
U
O
TYPICAL APPLICATI  
Frequency Response  
6
Differential Input Variable Gain Amp  
V
= ±15V  
= 100Ω  
S
L
R
3
0
15V  
4.7µF  
+
I
= 1mA  
SET  
R3A  
10k  
–3  
7
4
3
2
+
–
+
–6  
1
8
g
R2A  
10k  
V
m
+
–
IN  
–9  
6
I
I
= 300µA  
SET  
–
5
CFA  
V
OUT  
–12  
–15  
–18  
I
SET  
R
–15V  
R2  
F
470Ω  
R4  
R5  
10k  
R3  
100Ω  
= 100µA  
4.7µF  
1.24k  
SET  
+
100Ω  
R1  
270Ω  
R
G
–21  
–24  
HIGH INPUT RESISTANCE  
EVEN WHEN POWER IS OFF  
–18dB < GAIN < 2dB  
10Ω  
R6  
100k  
1M  
10M  
100M  
6.19Ω  
V
≤ 3V  
IN  
RMS  
LT1228 • TA01  
FREQUENCY (Hz)  
LT1228 • TA02  
1
1234567...20

中文翻译

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