A 4-ch digital to analog converter - OPA277 or OPA4277?

[powersys]

I wish to build a 4-channel digital to analog converter with bipolar outputs using TI TLV5614 DAC (see attached figure). As the output of TLV5614 is unipolar, external opamps are required to convert the unipolar signal to bipolar. I've two options, i.e. to use 4 pieces of OPA277 or one OPA4277. If cost is not a problem, which option that will result in lower noise operation?

Thanks.

 

[keith1200rs]

I don't think it will affect noise but crosstalk between the channels will be worse with a quad IC. Sometimes that is quoted in the data sheet but I cannot see it for the OPA4227.

I am sure there was an article about just his subject in the last couple of weeks in Electronics Weekly or Electronics Product Design magazine but I cannot find it.

Keith.

 

[FvM]

OPA x277 (as well as OPA x227) has a channel separation specification in datasheet. You can determine yourself, if it already
affects your system performance. You should consider howver, that a more serious signal quality issue must be expected from DAC
glitches (specified as glitch energy).

But if you're not sure about crosstalk, simply use single OPs.

 

[karesz]

...but crosstalk between the channels will be worse with a quad IC...Keith.

I dont no, but is not inpossible.
@powersys,
Otherwise, I think if the vendor is sure in hes subject with 4x pins as next ones of a 4x 12-Bit voltage-out DAC group; maybe in your 4xOpAmp it will be function too?
Surly is more simpler & higher chance to have a good 4x 12bit system if you select the single Ops_ draw the layout is lighter & better ignal quality is real!
K.