LMP90100 / ENOB(non free resonation), CMRR, Comssumption current

Ryuji

Guru 20090 points

Other Parts Discussed in Thread: LMP90100

Hi,

Could you please let me know below parameters of LMP90100?

1. ENOB (Non Free Resonation)

There is the table of ENOB( Non Free Resonation) In datasheet P.11.

Are these parameters Worst or Typcal ?

2.CMRR

There is the CMRR parameter in Datasheet P8 as the condition of 214.65SPS.

Could you please let me know CMRR at the condition of 20SPS? (min/ typ)

3.Comsumption Current at the condition of below parameters

-1ch of Single ended

-24bit ADC

-Gain= 100x (can I set 100x gain ? If I can't , please change 128x)

-20SPS

-VIN=10mV

-ENOB(Non Free Resolution) 17bit

-VA=VIO=3V or 5.5V

Thanks in advance for your help.

Best Regards,

Ryuji Asaka

over 13 years ago

0 Tom Hendrick over 13 years ago

TI__Guru**** 181001 points

Hi Ryuji,

For Q1 on the LMP90100, the values on page 11 for ENOB and noise free resolution would be 'typical' values. We'll try to get you details on your second and third questions tomorrow.

0 Ryuji over 13 years ago in reply to Tom Hendrick

Guru 20090 points

Hi Tom,

Thank you for your reply !

I wait your reply for other questions.

Best Regards,

Ryuji Asaka

0 MS1291 over 13 years ago

TI__Intellectual 2065 points

Hi Ryuji,

2. CMRR will be same for different data rate.

3. See below, for internal clock add 40uA to these numbers. Current consumption will be same for Gains 16, 32,64,128.

Regards,
Murali

0 Ryuji over 13 years ago in reply to MS1291

Guru 20090 points

Hi Murali,

Thank you.

2. I understood.

3. I understood.

I add 40uA to your attached data as consumption current at the below condition.

-1ch of Single ended
-24bit ADC
-Gain= 16, 32, 64, 128
-20SPS
-VIN=10mV
-ENOB(Non Free Resolution) 17bit
-VA=VIO=3V or 5.5V

Best Regards,

Ryuji Asaka

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LMP90100 / ENOB(non free resonation), CMRR, Comssumption current