trying to understand the REF pin on a DAC

From: kasterborus@xxxxxxxxx
Date: Mon, 29 Oct 2007 15:51:45 -0000

Can someone explain what the REF pin on my DAC is for?
It's an input voltage reference that can be GND, Vdd-1.5 or nominally
2.048v at Vdd =5v.

What is this voltage used for?
How does it affect the output?

Some of the circuits I see have tied this to Vdd - which seems too
high.

(The chip is the 5618 12-bit serial DAC)

Thanks,
Dave

.

Follow-Ups:
- Re: trying to understand the REF pin on a DAC
  - From: Eeyore
- Re: trying to understand the REF pin on a DAC
  - From: John Larkin
- Re: trying to understand the REF pin on a DAC
  - From: John Popelish

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Relevant Pages

Re: trying to understand the REF pin on a DAC
... It's an input voltage reference that can be GND, ... Some of the circuits I see have tied this to Vdd - which seems too ... The ref pin generally scales the full scale output of the DAC. ...
(sci.electronics.basics)
Re: trying to understand the REF pin on a DAC
... It's an input voltage reference that can be GND, ... Some of the circuits I see have tied this to Vdd - which seems too ... The ref pin generally scales the full scale output of the DAC. ...
(sci.electronics.basics)
Re: trying to understand the REF pin on a DAC
... It's an input voltage reference that can be GND, ... Some of the circuits I see have tied this to Vdd - which seems too ... The ref pin generally scales the full scale output of the DAC. ...
(sci.electronics.basics)
Re: trying to understand the REF pin on a DAC
... It's an input voltage reference that can be GND, ... Some of the circuits I see have tied this to Vdd - which seems too ...
(sci.electronics.basics)