Linear has announced the LTC6420-20 and LTC6421-20, claimed to be the first high-speed dual differential ADC drivers with guaranteed gain matching and noise and distortion performance.
With guaranteed matched gain of ±0.25 dB and matched phase of ±0.1 ° (typical), the 6420-20 reduces errors in multichannel systems such as IQ demodulation or diversity receivers. Channel separation is 80 dB at 100 MHz.
The 6420-20 provides a fixed gain of 20 dB with -84 dBc third-order intermodulation distortion at 100 MHz input frequency. Input voltage noise is 2.2 nV/√Hz, included internal gain-setting resistors.
The amplifiers are powered by a single 3 V supply and have rail-to-rail output swing. This allows the dual ADCs and amplifiers to share the same voltage supply in many applications. The drivers can drive an ADC directly without any external output impedance matching and can convert single-ended inputs into differential outputs.
Phone: 02 9644 7722
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