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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT1256CS датащи(PDF) 1 Page - Linear Technology |
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LT1256CS датащи(HTML) 1 Page - Linear Technology |
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1 / 24 page  1 LT1251/LT1256 40MHz Video Fader and DC Gain Controlled Amplifier TYPICAL APPLICATION Two-Input Video Fader – + – + IN1 IN2 2.5VDC INPUT RF2 1.5k VOUT RF1 1.5k IFS IC IC V+ V– NULL 1251/56 TA01 0V TO 2.5V CONTROL 2 – + – + 1 2 3 4 5 6 7 14 13 12 11 10 9 8 CONTROL LT1251/LT1256 1 CFS 5k 5k IFS LT1256 Gain Accuracy vs Control Voltage FEATURES DESCRIPTION s Accurate Linear Gain Control: ±1% Typ, ±3% Max s Constant Gain with Temperature s Wide Bandwidth: 40MHz s High Slew Rate: 300V/ µs s Fast Control Path: 10MHz s Low Control Feedthrough: 2.5mV s High Output Current: 40mA s Low Output Noise 45nV/ √Hz at AV = 1 270nV/ √Hz at AV = 100 s Low Distortion: 0.01% s Wide Supply Range: ±2.5V to ±15V s Low Supply Current: 13mA s Low Differential Gain and Phase: 0.02%, 0.02 ° , LTC and LT are registered trademarks of Linear Technology Corporation. APPLICATIONS s Composite Video Gain Control s RGB, YUV Video Gain Control s Video Faders, Keyers s Gamma Correction Amplifiers s Audio Gain Control, Faders s Multipliers, Modulators s Electronically Tunable Filters 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). 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. The LT1256 does not have this on/off feature and operates linearly over the complete control range. The LT1256 is recommended for applications requiring more than 20dB of linear control range. CONTROL VOLTAGE (V) 0 5 4 3 2 1 0 –1 –2 –3 –4 –5 2.0 1251/56 TA02 0.5 1.0 1.5 2.5 VS = ±5V VFS = 2.5V 100 GAIN ACCURACY (%) = AVMEAS – ()VC 2.5 () |
Аналогичный номер детали - LT1256CS |
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Аналогичное описание - LT1256CS |
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