TIPD166: How to increase the voltage range of TIPD166 to +/- 15v ?

silicon2 systems

Part Number: TIPD166
Other Parts Discussed in Thread: ADS8688

Hi ,

I wish to refer TIPD166 reference design to my Voltage logger project . In addition to +/- 5 , +/- 10 V , I also want +/- 15v support .

Is it possible without adding external components ? If no , what modification has to be done in the circuit for +/- 15v support ?

over 4 years ago

0 Dale Li over 4 years ago

TI__Mastermind 35450 points

Hi silicon2 systems,

ADS8688 ADC in this reference design can not support +/-15V signal directly. Except front-end signal conditioning solution with an amplifier, a simple solution is to use resistor divider (external resistor and input impedance of ADC), please check the details in application notes as below:

Circuit to increase input range on an integrated analog front end (AFE) SAR ADC

Extending Input Voltage Range and Understanding Associated Errors for ADC With Integrated Front End

Regards,

Dale

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TIPD166: How to increase the voltage range of TIPD166 to +/- 15v ?