OPA320: Use of OPA320 with power supply below spec. (1.71V)

tds

Prodigy 90 points

Part Number: OPA320
Other Parts Discussed in Thread: LM7705

The OPA320 is specified from 1.8V to 5.5V with a temperature range of -40 to 125.

Is it possible to use a supply voltage down to 1.71V if the temperatur range is set to 0 to 70 ?

Best Regards

Tor Dag

over 3 years ago

0 Raymond Zhang1 over 3 years ago

TI__Mastermind 47716 points

Hi tds

For a single rail, it is not recommended to operate OPA320 below 1.8V per the datasheet recommendation.

However, you may use 1.7V and place a negative supply rail of -0.232V from LM7705. The absolute max. supply voltage Vs = (V+) - (V-) < 6V. LM7705 is a switched capacitor voltage inverter --> input 3-5.25V for positive supply rail, it will generate -0.232V at its output

/cfs-file/__key/communityserver-discussions-components-files/14/OPA320-Low--Vcc-08042020.TSC

If you have any questions, please let us know.

Best,

Raymond

0 tds over 3 years ago in reply to Raymond Zhang1

Prodigy 90 points

Thanks :-)

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OPA320: Use of OPA320 with power supply below spec. (1.71V)