FDC1004 Te Whakaaturanga IC Takiwā Pūkoro Nui

Ko te FDC1004 he IC takiwā pūkoro e hangaia ana ki te inenga i ngā huringa iti rawa i roto i te capacitance, ka huri ke rātou ki ngā raraunga mamati ka taea te pānui e tētahi microcontroller. Ka whakamārama tēnei tuhinga i te pinout o te FDC1004, te prinsipia mahi, ngā whakaritenga matua, ngā āhuatanga, ngā tauwhiringa, te whakatairite ki ētahi atu IC takiwā pūkoro, me te whanonga o te pūhiko tūmataiti.

Kaāreti

FDC1004 IC Takiwā Pūrohe

Ko te FDC1004 he converter capacitance ki ngā raraunga me te teitei whakaritenga, 4-kanohi e hangaia ana mo ngā pūnaha takiwā pūrohe. Ka ine i ngā huringa capacitance iti rawa ka huri atu rātou ki ngā raraunga mamati ka taea te pānui e tētahi microcontroller mā te interface I²C.

Kei a ia te hōrangai katoa o ±15 pF mō ia kanohi, ā, ka taea te whakahaere i te capacitance offset pūrere ki te 100 pF. Ka taea te hōtaka i tēnei offset ki roto, ki waho hoki i te capacitor, e āwhina ana ki te whakarei i te whānui me te pumau o ngā ine.

Kei te FDC1004 hoki ngā kaitaraiwa pā e āwhina ana ki te whakaiti i te riri EMI me te whakaaro ki te huarahi takiwā o te pūrere takiwā pūrohe. E pai ake ana tēnei ki te pūnaha i ngā taiao haruru.

Ka wātea te FDC1004 i roto i ngā pōkai 10-pīn WSON me VSSOP, e rua he rahi tinana tino 3.0 mm × 3.0 mm. E tautoko ana tōna rahi iti i ngā hoahoanga takiwā pūrohe iti te hiko, iti te utu, me te penapena wāhi.

Ngā kōwhiringa me ngā tauira Tūtohu

IC / Tauira	Āhuatanga Matua	Ngā Kanohi	Hono
MPR121	Takiwā pūrohe pōtuhi	12	I²C
CAP1188	kaiwhakahaere pūrere pōtuhi	8	I²C
AT42QT1010	Takiwā pūrohe i te painga kotahi	1	Putanga Mamati
FDC2214	Takiwā pūrohe rahi-ake / capacitance	4	I²C
AD7746	Icinga whakaaro i te capacitance	2	I²C
CY8CMBR3116	kaiwhakahaere pātea pūrohe	16	I²C

FDC1004 Pinout me ngā Mahi Pīn

Pīn	Ingoa	Momo	Whakamārama
1	SHLD1	Kaitaraiwa Pā Putanga	Ka whakatakotahia te taupoki pā ki te whakaiti i te haruru EMI me te whakarei i te huarahi takiwā.
2	CIN1	Takiwā Pūrohe	Pūtahi 1 pūrere takiwā pūrohe.
3	CIN2	Takiwā Pūrohe	Pūtahi 2 pūrere takiwā pūrohe.
4	CIN3	Takiwā Pūrohe	Pūtahi 3 pūrere takiwā pūrohe.
5	CIN4	Takiwā Pūrohe	Pūtahi 4 pūrere takiwā pūrohe.
6	SHLD2	Kaitaraiwa Pā Putanga	I te kotahi kānana tuarua ngā putanga taraiwa mō te whakaruruhau rongo me te whakaiti i te haruru.
7	GND	Pūtāuta	Pūtāuta hono mō te IC.
8	VDD	Pāwera Iri	Te whakauru pūweratanga pai.
9	SCL	I²C Karaka	Rārangi karaka rārangi mō te kōrero I²C.
10	SDA	I²C Raraunga	Rārangi raraunga rārangi mō te kōrero I²C.

Me pēhea te mahi a te FDC1004 i roto i ngā pūnaha mōhiotanga kapekape

Ka mahi te FDC1004 mā te ine i ngā huringa tino iti i te kaha kapekape i waenga i te elektrode rongo me te pūtāuta. Ka neke mai te taonga conductive i te toitū rongo, ka huri te uara kapekape. Ka kitea e te IC tēnei huringa ka whakawhiti hei raraunga mamati e taea te tukatuka e tētahi microcontroller mā te interface I²C.

I roto i te FDC1004, ka tīpakohia e te MUX (whakarite) tētahi o ngā tōpū whakauru kapekape e whā (CIN1 ki CIN4). Ka hono te hūnuku rongo kua tīpakohia ki te hiko whakanui me te tauwai ki te rōnaki huri ki te mamati. Ka hanga te rōnaki hiko i te tohu mōhiotanga e whakamahia ana ki te ine i ngā huringa kapekape i ngā pārurenga tika.

Ka whakawhiti te kaha kapekape i ine-a-sima ki te uara mamati e te Converter Capacitance-to-Digital (CDC) i roto. Ka tīkina ēnei ine mamati mā ngā whiringa offset, te hihiri, me ngā rehita whakaritenga i mua i te tuku ki runga i te interface kōrero I²C mā ngā pin SDA me SCL.

Kei a te IC hoki ngā taraiwa SHLD1 me SHLD2, e āwhina ana ki te whakaiti i te haruru EMI me te whakapai i te pumau mōhiotanga. I tua atu, ka utu te hiko CAPDAC i roto e āhei ana te FDC1004 ki te pupuri i ngā ine tika ahakoa ngā elektrode rongo nui atu, nāna i rīpoata ngā pouri rongo.

Ngā Whakatau Matua o te FDC1004

Whakamārama	Uara
Momo Hangarau	4-Kānana Converter Capacitance-to-Digital
Pūhiko Voltage (VDD)	3 V ki 3.6 V
Āhuatanga Mahi	-40°C ki 125°C
Tawhā Mātai	±15 pF
Te kaha tūhura taimaha	100 pF
Whakaoti	16-bit
Te kaha pāwera (Te Puke Mahi)	750 µA he tino rerekē
Te kaha pāwera (Te Puke Whakarite)	29 µA he tino rerekē
Te pāhikohiko Whakahohoko	25 kHz
Pūhiko AC Whakahohoko	2.4 Vpp
Pūhiko DC Pāinga	1.2 V
Te āheinga Taraiwa Whakaruruhau	400 pF
Interface Kōrero	I²C
Te pāhikohiko I²C Karaka	10 kHz ki 400 kHz
Te Whakaora ESD (HBM)	±1000 V
Te pāmahana Pākukahu	-65°C ki 150°C
Ngā Whiringa Pākete	WSON-10, VSSOP-10
Te Rahi Pākete	3.0 mm × 3.0 mm

Ngā Ahuatanga IC mōhiotanga kapekape FDC1004

Te Tauine Rahi Rongo Mātai

Ka tautokohia e te FDC1004 te ine rahi rongo mātai me te tawhā whakauru o ±15 pF me te whakaotinga ine o 0.5 fF, e taea ai te tiki i ngā huringa kapekape tino iti.

Te Mōhiti Rongo Whitireia e whā

Kei te IC ngā tīwiri whakauru kapekape e 4, e āhei ana ki te whakahaere i te maha o ngā pūngao i roto i tētahi pūnaha mōhiotanga kotahi.

Te Tautoko Niu Kōhau Huringa Tūāhua

Ka taea e te FDC1004 te whakahaere i te tawhātī maere o te 100 pF, hei hāpai i ngā elektrode rongo nui atu me ngā pouri rongo roa.

Te Tautoko Tauine Whakapūtā Rawa

Ka tautokohia e te taputapu ngā reiti tauine e taea te whakarite e 100 S/s, 200 S/s, me 400 S/s mō te mahi mōhiotanga ngāwari.

Te Tākai Aroha

Ka mahi te IC me te whakamahia e 750 µA i te mōhanga active me 29 µA i te mōhanga tuuturu.

Te Tautoko Taraiwa Whakaruruhau

Kei ngā taraiwa tāpirihia te kaha o te 400 pF ki te tino whākana, e āwhina ana ki te whakaiti i te pāwhara EMI me te whakapai i te pūmau mōhiotanga.

Te Interface Kōrero I²C

Ka whakamahia e te FDC1004 he interface I²C paerewa mō te kōrero ki ngā microcontrollers me ngā pūnaha tāpiri.

Te Whānuitanga E Ātea Ana i te Pūnaho

Ka tautokohia e te taputapu te tawhā āhuatanga mai i −40°C ki 125°C.

Kei hea te FDC1004 e whakamahia ai?

• Ngā Interface Patoa Kapekape – E whakamahia ana mō te whakamātautau i te pātuhi mai i te atu pā Māori kāore e tupono ki te whanake i ngā mata pātea.

• Ngā Pūnaha Mātai Pātea – E ine ana i ngā taumata pātea mā ngā ipu kāore he pā ki a rātou.

• Ngā Pūnaha Kōwhiri Tūturu – E kitea ana ngā taonga conductive tata mā te huringa kapekape.

• Ngā Pūrere Te Whai Tūmomo Whakamātau – E whai ana i ngā nekehanga ringaringa me ngā mahi tūmomo huri noa i te rārangi rongo.

• Te Pōkai Rawa Kāpata Huringa – Ka whakamahia i roto i ngā pūnaha āta noho ki te inenga kawea.

• Pūnaha Paerewa Kei Roto – Kua whakauruhia ki ngā hoahoa mō te inenga me te tirotiro e whakahauhia ana e te I²C.

• Ngā Tūtohu Tirohanga Taiao – Ka tautoko i ngā pūnaha inenga e tirotiro ana i ngā whakarereketanga rawa, i ngā whakarereketanga taiao e whakamahi ana i te huringa kapaitanga.

FDC1004 vs Ētahi Atu ICs Kāpata Huringa

Āhuatanga	FDC1004	MPR121	CAP1188	AD7746
Mahi Matua	Inenga kawea me te āta whaihoki	Huringa pātuhi kapaitanga	Huringa pātuhi kapaitanga	Inenga kawea me te āta whaihoki
Te Rahi o ngā Awa	4	12	8	2
Whakauru	I²C	I²C	I²C	I²C
Inenga Tūturu	16-bit / 0.5 fF	Inenga taumata pātuhi iti	Huringa taumata pātuhi	24-bit teitei te āta whaihoki
Tūāpapa Whakauru	±15 pF	Tūtohu pātuhi te whakauru	Tūtohu pātuhi te whakauru	±4 pF te tikanga
Tautoko Kapaitance Offset	100 pF	He iti ngā whakaritenga	He iti ngā whakaritenga	He iti i te nui o FDC1004
Tautoko Rīwhi Kākahu	Ae	Kāore	Kāore	Kāore
Mahi Pūhiko Iti	Ae	Ae	Ae	Te Waenganui
Te Mea Pai Mo	Huringa kapaitanga hei āta	Pātūhi pātuhi me ngā paepae	Whakauru pātuhi tangata	Huringa pātuhi ahumahi
Mātau	Te Waenganui	He Māmā	He Māmā	Teitei
Momo Pākete	WSON / VSSOP	QFN	QFN / SOIC	MSOP
Painga Nui	Te painga teitei me te tautoko kākahu	Ētahi atu awa pātuhi	He māmā te whakahaere pātuhi	Ko te inenga tino teitei

FDC1004 Pūāhua Tono

Ko te pūāhua tono e whakaatu ana me pēhea te mahi o te FDC1004 hei kaiwhakahaere huringa kapaitanga e hono ana ki ngā tūtohu ā-waho me te microcontroller (MCU). I roto i tēnei hoahoa, ko ngā titi huringa kapaitanga e hono ana ki ngā auaha whakauru CIN1–CIN4. E ngāwari ana ēnei tūtohu ki te kite i ngā whakarereketanga kapaitanga nāna i whakatū.

I roto i te IC, ka whiriwhiria e ngā multiplexers CHA me CHB ngā awa inenga kōwhiri. Ka tāpiritia e te rōpū whakatūnga te tohu inenga e whakamahia ana hei utu me te inenga i te kapaitanga tūtohu. Ka whakapātea e te Capacitance-to-Digital Converter (CDC) te kapaitanga i inengatia ki ngā uara matihiko.

Ka whakakīkīhia e te CAPDAC te kapaitanga offset o te tūtohu, e whakarei ana i te taurite inenga i te whakamahi i ngā titi huringa rahi, rahi atu, i ngā tōpūtanga PCB. Ka whakareihia e te Offset & Gain Calibration te tika mā te whakatika i ngā whakarereketanga inenga.

E awhina ana ngā kaitiri SHLD1 me SHLD2 ki te whakaiti i te ngaru EMI me te kapaitanga painga e hiahia ana. Ka whakarei tēnei i te huarahi inenga me te noho i tēnei pūnaha ki te manaaki i ngā taiao harahara.

Ka kōrero te FDC1004 ki te MCU i roto i te āhua I²C mā te whakamahi i ngā rīriki SDA me SCL. Ka pupuri ngā tawhā e hāngai ana ki te 3.3 V i te pāwhiri I²C.

Raraunga Pākete FDC1004

Whakatau

Ko te FDC1004 IC Huringa Kapaitanga he kōwhiringa kaha mō ngā hoahoa e hiahia ana ki te inenga kapaitanga tika me te taurite. Ko āna awa inenga e whā, te tikanga teitei, te whakakī i te pāti, ngā kaitiri kākahu, me te āhua I²C e whakarite ana hei whānui ake i ngā kaiwhakahaere pātuhi māmā. Ka āwhina ēnei āhuatanga ki te whakarei i te tika inenga, ka whakaitihia ngā whakapā atu, me te māmā ake i te kōrero ki ngā microcontrollers. Ko te FDC1004 te mea pai mo ngā kaupapa e hiahia ana i ngā tawhā e rahi ake i te kitenga pātuhi māmā. He pae nui te whakamahi i te wā ka hiahia te hoahoa ki te inenga kapaitanga tika, ngā pāti kāore e xhaka, ngā tārua tūtohu e maha, me te whakahaere noise pai.

Ngā Pātai I Pānuitia [FAQ]

1. Me pēhea te pupuri o te FDC1004 i te inenga kapaitanga tika i roto i ngā taiao harahara?

Ka whakauru te FDC1004 i ngā kaitiri kākahu i whakaurua (SHLD1 me SHLD2) e awhina ana ki te whakaiti i te pāwhiri EMI me te kapaitanga painga e hiahia ana. Ka whakarei tēnei i te taurite inenga me te āheinga ki te inenga kapaitanga te tika i reira ka tae mai te ngaru hiko ā-waho.

2. He aha te tautoko o te FDC1004 ki te 100 pF kapaitanga offset?

Ko te tautoko o te kapaitanga offset nui ka taea e te IC te mahi ki ngā titi huringa rahi ake me ngā tohutohu PCB roa. Ka awhina tēnei te pupuri i ngā āhuatanga inenga pūmau me te kore e ngaro te tika o te inenga.

3. He aha i rerekē ai te FDC1004 mai i ngā ICs kaiwhakahaere pātuhi kapaitanga paerewa?

I tua atu i nga kaipōti pa whakahoahoa, ko te FDC1004 i hangaia mo te ine capacitance teitei te rahi. E tuku ana i te 16-bit te rahi, nga tauwhāinga i taea te whakauru, me nga āhuatanga ine tika e tautoko ana i nga pūnaha ine whakahake ake.

4. Me pehea te whakapainga a te CAPDAC i roto i te FDC1004 ki te ine?

Ko te CAPDAC o roto e whakaora ana i te capacitance i te taha mahinga i mua i te whakawhiti. Ka whakaiti i nga he ine ka whakarei i te pumau i te whakamahi i nga sensoa nunui, i nga hononga sensoa roa.

5. He aha te mea nui o te whakauru I²C i roto i nga pūnaha e whakawhirinaki ana ki te FDC1004?

Ko te whakauru I²C e whakaheke ana i te whakawhitiwhiti i waenga i te FDC1004 me nga microcontrollers. Ka whakaiti i te uaua o te tuku reweti ka mea e taea te whakauru ngawari ki roto i nga pūnaha ine mānā.

6. Me pehea te pānga o nga tere raraunga putanga e taea te whakauru ki te FDC1004?

Ko nga tere putanga e taea te whiriwhiri, ko 100 S/s, 200 S/s, me 400 S/s ka taea e te kaihoahoa te whakarite i te tere ine, te wa urupare, me te whakamahi hiko i runga i nga whakaritenga o te pūnaha.

7. He aha te mea nui o te whakamahi hiko iti i roto i nga pūnaha ine capacitive?

I te whakamahi i te hiko mahi tata ki te 750 µA me te hiko tūngāo tata ki te 29 µA, ko te FDC1004 e awhina ana i te whakaiti i te whakamahinga hiko o te pūnaha, he mea nui mo nga taputapu hiko whakatairanga me te whakamahi hiko whaihua.