10-GHz GBW, low noise differential amplifier/ADC driver
The amplifier offers low distortion, providing 85 dB spurious-free dynamic range (SFDR) at 100 MHz while driving 2VP-P signals. Four external resistors set the differential gain of each amplifier, configurable from unity gain with frequency response beyond 1 GHz, to gain of 100 with bandwidth of 100 MHz, and up to a maximum gain of 400 with bandwidth of 30 MHz. At these high frequencies, the LTC6419 claims significantly better channel-to-channel isolation of 95 dB at 100 MHz than other similar class dual amplifiers. Its wide DC common mode voltage ranges, 0V to 3.5V at the input, and 0.5V to 3.5V at the output, make the part useful in DC-coupled applications interfacing between two dissimilar DC levels, such as from the outputs of an I/Q demodulator to the inputs of analogue-to-digital (A/D) converters.
It is therefore suited for applications such as direct conversion receivers, driving high sample rate ADCs, high speed data acquisition systems, test instrumentation, high resolution radar systems, advanced image sensors and LIDAR systems.
In a 4 x 3 x 0.75 mm, 20-lead LQFN plastic package, two grades are offered: an I grade rated from –40°C to 85°C and an H grade from –40°C to 125°C. The LTC6419 I grade is priced starting at $8.50 and the H grade starting at $9.90 (1,000).
Linear Technology/Analog Devices; www.linear.com/product/LTC6419
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