Re: Power disipation of SiPM's (fwd from Fernando)

[Elton Smith <elton@jlab.org>]

---------- Forwarded message ----------
Date: Fri, 09 Mar 2007 13:53:21 -0500
From: Fernando J. Barbosa <barbosa@jlab.org>
To: Elton Smith <elton@jlab.org>
Cc: Fernando J. Barbosa <barbosa@jlab.org>
Subject: Re: Power disipation of SiPM's

Hi Elton,

    Thanks. There seems to be some confusion with these numbers. The
numbers from SensL's web site have typical numbers, which may be a bit
conservative: +/-5 V @ 50 mA for the amplifier and 30V @ 10 mA. This
equates to 0.8W per sensor.

    I checked the amplifier SensL employs (OPA656) and its power specs
are +/-5 V @ 14 mA quiescent. This equates to 2.25 W per 16 channel
module. Considering the power supply, and to be on the safe side, I
would require +/-5 V @ 25 mA or 0.25 W per amplifier which is close to
Paul's estimate of 5 W.

    As for the bias, George mentions 30V @ 10 uA. For the 16-ch module,
the power would be 30V @ 160 uA or 5 mW .

    The power supplies for the BCAL and part of the Tagger would be: +5
V @ 80 A, -5 V @ 80 A and 30 V @ 1A. I am not including any power for
the Peltier cooling system here.

Best regards,
Fernando

Elton Smith wrote:
> Hi Fernando,
>
> Here is an e-mail from SensL via George on the power dissipation.
>
> Cheers, Elton.
>
>
> ---------- Forwarded message ----------
> Date: Tue, 27 Feb 2007 09:34:37 -0600
> From: George Lolos <George.Lolos@uregina.ca>
> To: elton@jlab.org
> Cc: Zisis Papandreou <Zisis.Papandreou@uregina.ca>
> Subject: Power disipation of SiPM's
>
> Hi Elton:
>
> Here's the feedback from SensL, with and without cooling.  I hope this
> answers your question?
> -----------------------------------
> From Padraig:
>
> In answer to your question, the energy dissipation from the detector is
> minimal - 300uW based on a 30V bias with upto say 10uA current draw.
> This scales with number of detectors.
>
> For the electronics
> At room temp 6-7mA of current draw at 5V gives about 60mW
> Cooled this goes up by an order of magnitude.
> -----------------------------------
>
> Cheers,
>
> George
>