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LT6402CUD-12-TRPBF Datasheet(PDF) 10 Page - Linear Technology |
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LT6402CUD-12-TRPBF Datasheet(HTML) 10 Page - Linear Technology |
10 / 16 page LT6402-12 10 640212fa Circuit Description The LT6402-12 is a low noise, low distortion differential amplifier/ADC driver with: • –3dB bandwidth DC to 300MHz • Fixed gain independent of RLOAD 4V/V (12dB) • Differential input impedance 100Ω • Low output impedance • Built-in, user adjustable output filtering • Requires minimal support circuitry Referring to the block diagram, the LT6402-12 uses a closed-loop topology which incorporates 3 internal am- plifiers. Two of the amplifiers (A and B) are identical and drive the differential outputs. The third amplifier is used to set the output common mode voltage. Gain and input impedance are set by the 200Ω resistors in the internal feedback network. Output impedance is low, determined by the inherent output impedance of amplifiers A and B, and further reduced by internal feedback. The LT6402-12 also includes built-in single-pole output filtering. The user has the choice of using the unfiltered outputs, the filtered outputs (75MHz –3dB lowpass), or modifying the filtered outputs to alter frequency response by adding additional components. Many lowpass and bandpass filters are easily implemented with just one or two additional components. BLOCK DIAGRAM + – 14 –INA 5 +OUT 64026 BD 3 VCCA 10 VCCB 1 VCCC 11 ENABLE 13 –INB 14pF VCCA A VEEA VEEA 50Ω 6 +OUTFILTERED – + 16 +INA 8 –OUT 15 +INB VCCB B VEEB VEEB 100Ω 100Ω 100Ω 100Ω 200Ω 200Ω 200Ω 200Ω 50Ω 14pF 14pF 7 –OUTFILTERED 12 VEEC 9 VEEB 4 VEEA + – VEEC C VCCC 2 VOCM BIAS APPLICATIONS INFORMATION |
Similar Part No. - LT6402CUD-12-TRPBF |
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