Linear Technology Corporation (Linear Technology Corporation) introduced fully differential amplifier LTC6409, the device can drive DC to 100MHz signals distortion only 1.1nV / √Hz noise and -88dBc HD2 / HD3 is. The LTC6409 is fabricated using advanced SiGe BiCMOS process technology with a 10GHz gain-bandwidth product, 100dB SFDR up to 40MHz and a 1.9ns settling time of 1% accuracy. It is ideal for driving the latest high speed ADCs (eg 1.8V 14-bit 150Msps LTC2262-14). When using a single 5V supply, the LTC6409 has a wide input common-mode range of 0V to 3.5V and an output common-mode range of 0.5V to 3.5V, making it easy to connect ground-referenced signals to differential pipelined ADCs. .
Gain and feedback resistors are external, allowing designers to accurately configure the gain required for each application. The amplifier is unity-gain stable, and a large output current of up to 95mA allows the device to drive feedback and gain resistors with low resistance values ​​(eg 150Ω), resulting in very low output noise.
The LTC6409 is fully compliant with a single 3V or 5V supply. Despite the device's wide bandwidth and low noise performance, the supply current draws only a maximum of 56mA, and in shutdown, the shutdown mode reduces current to 500uA. The typical value of the on time is 160 ns.
The LTC6409 will be used in pulse signal applications such as radar signal processing, imaging, high speed test and measurement, and communications applications.
"The flexibility and performance of the LTC6409 make it ideal for DC-coupled time-domain sensor applications and direct-conversion receiver applications," said Linear Technology's design manager Kris Lokere. It's very easy to convert voltage values ​​and convert single-ended signals into Differential signals while maintaining very low noise and distortion."
The LTC6409 is available in a 2mm x 3mm QFN package and is fully temperature tested in C (0°C to 70°C), I (-40°C to 85°C) and H (-40°C to 125°C) temperature ranges. Provisions. The 1,000-piece purchase price is $4.50 per piece. For more information, please visit
Photo caption: 1.1nV/√Hz, 88dB SFDR, differential amplifier from DC to 100MHz
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