looking for high bandwidth analog optocoupler

[Markus Friedl]

hi all,
i'm looking for a high-speed (>=40 MHz bandwidth) analog (and, ideally,
linear) optocoupler. the isolation is not critical (100 V is enough).
the fastest thing i could find is agilent's HCPL-4562, but it is limited
to 17 MHz. does anyone know something faster?
thx, markus

 

[scada]

"Markus Friedl" <markus.friedl@cern.ch> wrote in message
news:3F96B0BD.2060100@cern.ch...

hi all,
i'm looking for a high-speed (>=40 MHz bandwidth) analog (and, ideally,
linear) optocoupler. the isolation is not critical (100 V is enough).
the fastest thing i could find is agilent's HCPL-4562, but it is limited
to 17 MHz. does anyone know something faster?
thx, markus

A Fiber optics Receiver - Transmiter.

 

[Bill Sloman]

Markus Friedl <markus.friedl@cern.ch> wrote in message news:<3F96B0BD.2060100@cern.ch>...

hi all,
i'm looking for a high-speed (>=40 MHz bandwidth) analog (and, ideally,
linear) optocoupler. the isolation is not critical (100 V is enough).
the fastest thing i could find is agilent's HCPL-4562, but it is limited
to 17 MHz. does anyone know something faster?
thx, markus

Why not use a transmission line transformer? Use a twisted pair of
enamelled wire as your transmission line, and wind it around an RM4
core or something equally compact.

The last one I did was good from 50kHz to 150MHz, and the linearity
and stability should be phenomenally good. The inter-winding
capacitance is a bit high, at about 100pF.

-------
Bill Sloman, Nijmegen

 

[Robert Lacoste]

May be is it too much for your need, but for optimal linearity you could use
an ADC, a couple of digital isolators (like one of the iCoupler chips from
AD) and a DAC...

Cheers,
Robert
www.alciom.com

"Markus Friedl" <markus.friedl@cern.ch> a écrit dans le message de
news:3F96B0BD.2060100@cern.ch...

hi all,
i'm looking for a high-speed (>=40 MHz bandwidth) analog (and, ideally,
linear) optocoupler. the isolation is not critical (100 V is enough).
the fastest thing i could find is agilent's HCPL-4562, but it is limited
to 17 MHz. does anyone know something faster?
thx, markus