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DA400

The primary function of our DA400 distribution amplifier is to distribute an existing signal to multiple points while preserving its integrity.  The DA400 is ideal for situations requiring a low noise RF signal to be supplied to multiple usage points.

The DA400 has one input channel  and five output channels.  It may be configured with either SMA or BNC connectors (details provided in the connector table on page 4). The input is AC-coupled and has a 50 Ω source impedance. This design provides a 1.8V CMOS output across a wide range of input power levels.

The single input is buffered and then fanned out to five output stages with Schmitt Trigger drivers.  This configuration ensures high channel-to-channel isolation with fast transition times and low overshoot. This configuration achieves channel to channel phase offset of under 10 ns; the phase offset from the input to any output is less than 20 ns at 10 MHz.

For larger systems requiring more outputs, multiple amplifiers may be daisy-chained together by connecting the output of channel five to the input of another distribution amplifier.  However, this configuration increases phase offset between amplifiers.  If channel-to-channel phase offset is a concern, the recommended configuration would be to use a single amplifier to drive up to five additional amplifiers. This will provide up to 25 outputs with minimal channel-to-channel phase offset.

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