CCS/LMP91000: How long is the LMP91000 exiting the DeepSleep mode output voltage stable?

user5760268

Part Number: LMP91000

Tool/software: Code Composer Studio

Hello everyone

I found the following problems in the process of using LMP91000: I quit from the DeepSleep mode and enter the 3lead amperometric cell. I used the oscilloscope to observe the Vout output voltage and found that it takes about 3.6s to stabilize. FET-SHORT is enabled.
Is this situation normal?
How long does it take for the output voltage to stabilize from the standby mode to the 3lead amperometric cell mode?

Thanks

over 4 years ago

0 Ren Schackmann over 4 years ago

TI__Mastermind 35835 points

The settling time is dependent on the cell. We don't recommend turning off the bias for this reason. See 7.3.1.2 Control Amplifier, 7.4 Device Functional Modes, and 7.6.5 MODECN -- Mode Control Register (Address 0x12).

Thanks,

Ren

0 user5760268 over 4 years ago in reply to Ren Schackmann

Prodigy 80 points

Thanks,

How can I keep A1 open while entering Deepsleep?

How does A1 turn on and off?

0 Ren Schackmann over 4 years ago in reply to user5760268

TI__Mastermind 35835 points

Entering DeepSleep in MODECN will turn off A1. Use Standby instead.

Thanks,

Ren

0 user5760268 over 4 years ago in reply to Ren Schackmann

Prodigy 80 points

I tried different combinations,

entering Active from DeepSleep and entering Active from StandBy.

It is found that the output voltage is stable for the same time, and it takes about 4s.

FET-SHORT is always on

Thanks

0 Ren Schackmann over 4 years ago in reply to user5760268

TI__Mastermind 35835 points

Did you have any further questions?

thanks,

Ren

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CCS/LMP91000: How long is the LMP91000 exiting the DeepSleep mode output voltage stable?