another good choice is the xtr110 by burr brown. Does everything you need.
--
JUSTIN GRIMM
Eclipse Energy Systems
Email - eclipse@coastlink.com.au


John Fajta wrote:

> > On Fri, 7 May 1999, Harrison Cooper wrote:
> >
> >  sums it up.  Someplace I thought I had read/heard/seen a single chip that
> >  would do this. Sure, do it with an opamp, but I want a KISS solution, singl
e
> >  part with all the resistors, etc on the internal etch, and guaranteed to
> >  drive an industrial 4-20mA device.
>
> Hi Harrison,
>
> Check out the Analog Devices AD694 16-pin 4-20mA transmitter. It is a
> single chip solution for input spans of 0-2V or 0-10V. However, other spans ma
y
> be programmed using the internal buffer amplifier and an external resistor. Ca
n
> also function with a minimum supply voltage of 4.5V. This would require scalin
g
> the input to 0-2V, but again this can be done using an external resistor.
>
> A very versatile chip I use in production - saves a lot of board space and
> design headaches. Grab the AD694.PDF file off their web site for details.
>
> Good luck,
>
> John
> Hohner Shaft Encoder Corp.
> Ontario, Canada