ADC12D500RF Vbias

Kangbaek Kim

Intellectual 320 points

What is the purpose of bias voltage for I and Q channels (VbiasI and VbiasQ)?

Is this something I have to supply separately from VA?

Please let me know how I should handle in design. Thanks in advance.

over 7 years ago

0 Jim Brinkhurst1 over 7 years ago

TI__Mastermind 43930 points

Hi Kangbaek

VbiasI and VbiasQ are internally generated bias voltages. There is no need to supply power separately.

In your design you need to include decoupling capacitors as noted in the datasheet. Each VbiasI and VbiasQ ball must have 100nF low ESR and low ESL capacitor to GND.

Best regards,

Jim B

0 Kangbaek Kim over 7 years ago in reply to Jim Brinkhurst1

Intellectual 320 points

Thanks for the clarification Jim.

Kangbaek

Data converters

Data converters forum

ADC12D500RF Vbias