LT6600-5 - Very Low Noise, Differential Amplifier And 5MHz Lowpass Filter
The LT6600-5 combines a fully Differential Amplifier with a 4th order 5MHz lowpass Filter approximating a Chebyshev frequency response. Most Differential Amplifiers require many precision external components to tailor gain and bandwidth. In contrast, with the LT6600-5 two external resistors program differential gain, and the filter's 5MHz cutoff frequency and passband ripple are internally set. The LT6600-5 also provides the necessary level shifting to set its output common mode voltage to accommodate the reference voltage requirements of A/Ds. Using a proprietary internal architecture, the LT6600-5 integrates an antialiasing Filter and a Differential Amplifier driver without compromising distortion or low noise performance. At unity gain the measured in band signal-to-noise ratio is an impressive 82dB. At higher gains the input referred noise decreases so the part CAN process smaller input differential signals without significantly degrading the output signal-to-noise ratio. 50e
The LT6600-5 also features low voltage operation. The differential design provides outstanding performance for a 2VP-P signal level while the part operates with a single 3V supply.
For similar devices with other cutoff frequencies, refer to the LT6600-20 LT6600-10 and LT6600-2.5.
By Linear Technology Corporation
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