LT6600-2.5

• Product Introduction

The LT6600-2.5 features a very low noise, differential amplifier, and 2.5MHz low-pass filter

peculiarity ±0.6dB (max) ripple fourth-order low-pass filter with a 2.5MHz cut-off frequency Two external resistors can be used to set the differential gain Adjustable output common-mode voltage 3V, 5V, ±5V operating power supplies are used, and technical specifications are developed for these operating power supplies 86dB S/N (with 3V supply and 1VRMS output) Low distortion, 1VRMS, 800Ω load         1MHz: 95dBc (2nd order), 88dBc (3rd order) Fully differential inputs and outputs Compatible with the pin configurations of common differential amplifiers SO-8 and DFN-12 packages description ®The LT 6600-2.5 combines a fully differential amplifier with a 4th order 2.5MHz low-pass filter that approximates the frequency response of Chebyshev. Most differential amplifiers require the use of a lot of precise external components to trim the gain and bandwidth. The difference is that with the LT6600-2.5, the differential gain can be set by two external resistors, and the filter's 2.5MHz cutoff frequency and passband ripple are set internally. The LT6600-2.5 also provides the level shift necessary to set its output common-mode voltage to accommodate the A/D voltage reference. The LT6600-2.5 features a proprietary internal architecture that integrates an antialiasing filter and a differential amplifier/driver without sacrificing distortion or low-noise performance. Under unity gain conditions, the measured in-band signal-to-noise ratio reaches an impressive 86dB. At higher gains, the input reference noise decreases, allowing the device to handle smaller input differential signals without significant degradation of the output signal-to-noise ratio. The LT6600-2.5 also has the ability to operate under low voltage conditions. The differential design provides exceptional performance for a single 4VP-P signal level, and the device can operate from a single 3V operating supply. The LT6600-2.5 is available in SO-8 and DFN-12 packages. For information on similar devices with higher cut-off frequencies, see the datasheets for the LT6600-5, LT6600-10, LT6600-15, and LT6600-20. apply High-speed ADC antialiasing and DAC filtering in network or cellular applications High-speed test and measurement equipment Medical imaging Drop-in replacement for differential amplifiers