PGA305: PGA305 recommended Thermistor

Kazuki Kuramochi

Expert 8380 points

Part Number: PGA305
Other Parts Discussed in Thread: TMP61

Hi professional,

My customer consider to use TMP61 for PGA305's thermistor. Is it possible?

Moreover, Do you have any recommended thermistor for PGA305?

Best regards,

Kazuki Kuramochi

over 4 years ago

0 Scott Cummins over 4 years ago

TI__Mastermind 31655 points

Hello Kazuki,

The TMP61 thermistor would work in this application. However, the maximum current output of 500uA should not be used in this case because of the high resistance of the thermistor (10k). With 5V across the thermistor, the internal current source will run out of headroom and will not be able to regulate the current. Using 100uA would be preferred.

Regards,

0 Kazuki Kuramochi over 4 years ago in reply to Scott Cummins

TI__Expert 8380 points

Hello Scott,

Thank you for your kindly explanation.
I understood.

Best regards,
Kazuki Kuramochi

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PGA305: PGA305 recommended Thermistor