ADC1_GPIO37 ADC1_GPIO38 ./. SENSOR_CAPP SENSOR_CAPN

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rudi ;-)
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Joined: Fri Nov 13, 2015 3:25 pm

ADC1_GPIO37 ADC1_GPIO38 ./. SENSOR_CAPP SENSOR_CAPN

Postby rudi ;-) » Sat Dec 19, 2015 5:43 am

Hi espressif,
( no hurry )

can we for test later do mod (dismantle/remove)
C11 ( 270pF) Chip Pin5+6
C12 (270pF) Chip Pin 7+8

to get full (without sensor function)
ADC1_PAD_GPIO37(Chip Pin 7)
ADC1_PAD_GPIO38 (Chip Pin 8)

then
ADC1_PAD_GPIO36 (Chip Pin 6)
ADC1_PAD_GPIO39 (Chip Pin 9)
is without C11,C12, Complications inside SoC?
I think inside no, but ask before do next time.

of course, we must solder there pads,(missing 37,38 pad on board)
have not found PAD for GPIO37, GPIO38
so my thinking is, for later test to remove the C11, C12 and docking there for wire.
ok?

second question: ( edit i have move to SDK )

thank you espressif!
best wishes
rudi ;-)
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Espressif_Kelly
Posts: 6
Joined: Tue Nov 24, 2015 2:19 am

Re: ADC1_GPIO37 ADC1_GPIO38 ./. SENSOR_CAPP SENSOR_CAPN

Postby Espressif_Kelly » Wed Feb 17, 2016 7:14 am

Dear Rudi,

C11 and C12 can be used as the sample capacitors for internal switching amplifier.

Application scenario 1: with C11 and C12

You can get a high-precision amplifier which can sense the tiny voltage between SENSOR_VP and SENSOR_VN.

Application scenario 2:without C11 and C12

You can get 4 channels of normal adc (SENSOR_VP SENSOR_CP SENSOR_CN SENSOR_VN ).

Please be noted that this is an either-or situation.

Any more questions, please let us know.

Thanks.

akshaypoh@gmail.com
Posts: 2
Joined: Fri Oct 27, 2017 4:21 am

Re: ADC1_GPIO37 ADC1_GPIO38 ./. SENSOR_CAPP SENSOR_CAPN

Postby akshaypoh@gmail.com » Fri Oct 27, 2017 4:24 am

hi, I want to use GPIO37and GPIO38 as normal analog input pins what should I do?
can you guide me with few detailed steps?
thank you in advance.

akshaypoh@gmail.com
Posts: 2
Joined: Fri Oct 27, 2017 4:21 am

Re: ADC1_GPIO37 ADC1_GPIO38 ./. SENSOR_CAPP SENSOR_CAPN

Postby akshaypoh@gmail.com » Fri Oct 27, 2017 4:27 am

@Espressif_Kelly is it necessary to remove this two capacitors to use GPIO37 & GPIO38 as normal analog input pins.
Thank you in advance.

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