Whether IC AD8174 suitable for following requirements?
Base band switching IC in freq range DC- 40MHz
Input level: +5dBm at 50 ohms
Output drive level: +9dBm at 50 ohms
Slew rate better than 500V/s
High input to output isolation within the band
Apologies for the very late reply.
The AD8174 can receive an input voltage of 5dBm (equivalent to 1.125Vp-p) and can produce an output of 9dBm (equivalent to 1.782Vp-p) with a 50ohm load. However, with a frequency of 40MHz, the expected slew rate will only be ~283V/s (or 282.74V/us). The formula for this is input voltage divided by 1/frequency.
Can you please share your application or a block diagram instead?
Thanks for the reply.
Please find our application Block Diagram attached along with. We are using two AD devices i.e AD8174 as MUX and AD8079 for line driving. As per our application we need to switch between four Baseband signals (BB_IN1, BB_IN2, BB_IN3, BB_IN4) to two Baseband outputs (BB_OUT1 and BB_OUT2). Specifications of In and OUT signals are as follows:
BB_IN: DC-20MHz, +5dBm
BB_OUT: DC-20MHz, +11dBm, drives 50 Ohms load
Total path gain : 6dB
Q1. Please suggest whether the circuit is appropriate for above requirement, any limitations or considerations?
Q2. Whether AD8079 can be used as unity gain driver as shown in input stages?
pl reply as we are into design finalization.
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