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LT1251CS

更新时间： 2024-11-22 22:34:27
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衰减器
页数 文件大小 规格书
24页 477K
描述
40MHz Video Fader and DC Gain Controlled Amplifier

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中文翻译

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LT1251CS 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, SOP14,.25
针数：14Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.17Is Samacsys：N
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 µVJESD-30 代码：R-PDSO-G14
JESD-609代码：e0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封装等效代码：SOP14,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：235电源：5/30/+-2.5/+-15 V
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：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
标称均一增益带宽：40000 kHz宽度：3.9 mm
Base Number Matches：1

LT1251CS 数据手册

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LT1251/LT1256  
40MHz Video Fader and  
DC Gain Controlled Amplifier  
U
FEATURES  
DESCRIPTION  
The LT®1251/LT1256 are 2-input, 1-output, 40MHz cur-  
rent feedback amplifiers with a linear control circuit that  
sets the amount each input contributes to the output.  
These parts make excellent electronically controlled vari-  
able gain amplifiers, filters, mixers and faders. The only  
external components required are the power supply by-  
pass capacitors and the feedback resistors. Both parts  
operate on supplies from ±2.5V (or single 5V) to ±15V  
(or single 30V).  
■
Accurate Linear Gain Control: ±1% Typ, ±3% Max  
■
Constant Gain with Temperature  
Wide Bandwidth: 40MHz  
High Slew Rate: 300V/µs  
Fast Control Path: 10MHz  
Low Control Feedthrough: 2.5mV  
High Output Current: 40mA  
Low Output Noise  
■
■
■
■
■
■
45nV/√Hz at AV = 1  
270nV/√Hz at AV = 100  
Low Distortion: 0.01%  
Wide Supply Range: ±2.5V to ±15V  
Low Supply Current: 13mA  
Low Differential Gain and Phase: 0.02%, 0.02°  
Absolute gain accuracy is trimmed at wafer sort to mini-  
mize part-to-part variations. The circuit is completely  
temperature compensated.  
■
■
■
■
The LT1251 includes circuitry that eliminates the need for  
accurate control signals around zero and full scale. For  
control signals of less than 2% or greater than 98%, the  
LT1251 sets one input completely off and the other  
completely on. This is ideal for fader applications because  
it eliminates off-channel feedthrough due to offset or gain  
errors in the control signals.  
U
APPLICATIONS  
■
Composite Video Gain Control  
■
RGB, YUV Video Gain Control  
■
Video Faders, Keyers  
■
Gamma Correction Amplifiers  
TheLT1256doesnothavethison/offfeatureandoperates  
linearly over the complete control range. The LT1256 is  
recommended for applications requiring more than 20dB  
of linear control range.  
■
Audio Gain Control, Faders  
■
■
Multipliers, Modulators  
Electronically Tunable Filters  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
LT1256  
Two-Input Video Fader  
Gain Accuracy vs Control Voltage  
5
V
V
= ±5V  
FS  
S
4
3
= 2.5V  
LT1251/LT1256  
CONTROL  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
IN1  
IN2  
+
–
+
–
1
2
2
1
2.5VDC  
INPUT  
0V TO 2.5V  
CONTROL  
+
–
+
–
I
FS  
I
C
FS  
5k  
C
0
I
FS  
I
R
R
F1  
–1  
–2  
–3  
C
F2  
1.5k  
1.5k  
5k  
+
V
2.5  
NULL  
V
C
100  
(
–4 GAIN ACCURACY (%) =  
A
–
)
VMEAS  
(
)
8
–
V
–5  
0
0.5  
1.0  
1.5  
2.0  
2.5  
V
1251/56 TA01  
OUT  
CONTROL VOLTAGE (V)  
1251/56 TA02  
1
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中文翻译

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