8- Channel AD
Tau Txais Module
TIAB SA 706
Cov neeg siv phau ntawv
Ntu 1: 8-Channel AD Acquisition Module Parameters
- Module VPN: AN706
- AD Chiv: AD7606
- Channel: 8-channel
- AD bits: 16-ntsis
- Max Sample Rate: 200KSPS
- Cov lus qhia Voltage Rate: -5V ~ + 5V
- PCB txheej ntawm Module: 4-Layer, ywj siab lub hwj chim txheej thiab GND txheej
- Module Interface: 40-pin 0.1 nti sib nrug poj niam header, rub kev taw qhia
- Ambient Kub (nrog rau kev siv fais fab: -40 ° ~ 85 °, tag nrho cov chips ntawm module kom tau raws li cov kev xav tau ntawm kev lag luam
- Input interface: 8 SMA interfaces thiab 16-pin headers nrog 2.54 suab (Pin Txhua channel muaj qhov zoo thiab tsis zoo ob tus Pin)
- Kev ntsuas qhov tseeb: Hauv 0.5mV
Ntu 2: Module qauv
Daim duab 2-1: 8-channel AD module qauv
Ntu 3: AD7606 Chip Taw Qhia
AD76061 yog 16-ntsis, ib txhij sampling, analog-to-digital data acquisition systems (DAS) nrog rau yim, rau, thiab plaub raws, feem. Txhua feem muaj analog input clamp kev tiv thaiv, ib qho kev txiav txim thib ob antialiasing lim, taug qab-thiab-tuav amplifier, 16-ntsis them rov qab faib ua tiav approximation analog-to-digital converter (ADC), hloov pauv digital lim, 2.5 V siv thiab siv
Input clamp tiv thaiv circuitry tuaj yeem zam voltages mus txog ± 16.5 V. Lub AD7606 / AD7606-6 / AD7606-4 ua haujlwm los ntawm ib qho 5 V mov thiab tuaj yeem haum ± 10 V thiab ± 5 V tseeb bipolar input signals thaum sampNyob rau ntawm tus nqi nkag mus txog 200 kSPS rau txhua txoj kev. Input clamp tiv thaiv circuitry tuaj yeem zam voltag± 16.5V
AD7606 muaj 1 MΩ analog input impedance tsis hais sampling zaus. Kev khiav hauj lwm ib leeg, on-chip filtering, thiab siab input impedance tshem tawm qhov xav tau ntawm tus tsav tsheb op amps thiab lwm yam khoom siv bipolar.
AD7606 / AD7606-6 / AD7606-4 antialiasing lim muaj 3 dB txiav tawm zaus ntawm 22 kHz thiab muab 40 dB antialias tsis kam thaum sampNyob rau ntawm 200 kSPS.
Cov lim dej hloov tau yooj yim yog tus pin tsav, yields txhim kho hauv SNR, thiab txo 3 dB bandwidth.
Ntu 4: AD7606 Chip Functional Block Diagram
Daim duab 4-1: AD7606 Functional Block Diagram
Ntu 5: AD7606 Chip Timing Specification
Daim duab 5-1: AD7606 Timing Diagrams
AD7606 tso cai rau tib lub sijhawm sampling ntawm tag nrho yim analog input channels.
Tag nrho cov channel yog sampcoj ib txhij-taneously thaum ob leeg CONVST pins (CONVST A, CONVST B) khi ua ke. Ib lub teeb liab CONVST yog siv los tswj ob qho tib si CONVST x inputs. Qhov nce ntawm ntug ntawm qhov teeb meem CONVST no pib ib txhij sampLing rau tag nrho cov analog input channel (V1 txog V8).
Lub AD7606 muaj ib tug on-chip oscillator uas yog siv los ua tus hloov dua siab tshiab. Lub sij hawm hloov dua siab tshiab rau tag nrho ADC raws yog tCONV. Lub teeb liab BUSY qhia rau tus neeg siv thaum kev hloov pauv tau ua tiav, yog li thaum nce ntug ntawm CONVST tau thov, BUSY mus logic siab thiab hloov qis thaum kawg ntawm tag nrho cov txheej txheem hloov dua siab tshiab. Qhov ntog ntawm BUSY teeb liab yog siv los tso tag nrho yim txoj kev taug-thiab-tuav amplifiers rov qab mus rau hauv txoj kev khiav hom. Qhov poob ntawm BUSY kuj qhia tau hais tias cov ntaub ntawv tshiab tam sim no tuaj yeem nyeem los ntawm lub npav sib npaug (DB[15: 0]), DOUTA thiab DOUTB cov ntaub ntawv cov kab sib txuas, lossis cov tsheb npav sib npaug ntawm lub npav, DB [7: 0].
Ntu 6: AD7606 Chip Pin Configuration
Hauv AN706 8-channel AD module kho vajtse Circuit Court tsim, peb teeb tsa AD7606 txoj haujlwm ua haujlwm los ntawm kev ntxiv rub-up lossis rub-down resistors rau peb tus pins ntawm AD7606.
- AD7606 txhawb nqa kev siv sab nraud lossis kev siv sab hauv. Yog tias siv sab nraud siv, REFIN / REFOUT ntawm lub nti yuav tsum muaj kev siv sab nraud 2.5V. Yog siv ib qho kev siv sab hauv voltage. REFIN / REFOUT tus pin yog ib qho kev siv sab hauv 2.5V. REF SELECT tus pin yog siv los xaiv qhov siv sab hauv lossis siv sab nraud. Nyob rau hauv no module, vim hais tias qhov tseeb ntawm lub internal reference voltage ntawm AD7606 kuj yog siab heev (2.49V ~ 2.505V), lub Circuit Court tsim xaiv siv cov ntaub ntawv sab hauv voltage.
Pin npe Teeb theem Kev piav qhia REF SELECT Qib siab Siv internal reference voltage2.5 wb - AD7606's AD hloov dua siab tshiab cov ntaub ntawv yuav tau nyob rau hauv parallel hom los yog serial hom. Tus neeg siv tuaj yeem teeb tsa hom kev sib txuas lus los ntawm kev teeb tsa PAR / SER / BYTE SEL tus pin qib. nyob rau hauv AN706 module tsim, xaiv hom parallel los nyeem AD cov ntaub ntawv ntawm AD7606
Pin npe Teeb theem Kev piav qhia PAR/SER/BYTE SEL Qib qis Xaiv qhov sib txuas sib txuas - RANGE tus pin yog siv los xaiv ± 10 V lossis ± 5 V raws li cov tswv yim ntau hauv AD9767. Hauv ± 5 V, 1LSB = 152.58uV. Hauv ± 10 V, 1LSB = 305.175 uV. Hauv kev tsim Circuit Court ntawm AN706 module, xaiv ± 5V analog voltage input ntau
Pin npe Teeb theem Kev piav qhia RANGE Qib qis Analog teeb liab input ntau xaiv: ± 5V - AD7606 muaj ib qho kev xaiv digital first-order sinc filter uas yuav tsum tau siv rau hauv cov ntawv thov uas siv cov nqi qis dua los yog qhov twg siab dua cov teeb liab-rau-lub suab sib piv lossis ntau qhov kev xav tau. Cov oversampling piv ntawm cov lim digital yog tswj tau siv cov oversampling pins, OS [2:0] (saib cov lus hauv qab no). OS 2 yog MSB tswj me ntsis, thiab OS 0 yog LSB tswj me ntsis. Table hauv qab no muab cov oversampling ntsis decoding xaiv qhov sib txawv oversample nqi. OS pins yog latched ntawm ntug ntog ntawm BUSY.
Hauv kev tsim kho vajtse ntawm AN706 module, OS [2: 0] ua rau sab nraud interface, thiab FPGA lossis CPU tuaj yeem xaiv seb puas yuav siv cov lim los ntawm kev tswj tus pin qib ntawm OS[2: 0] kom ua tiav qhov kev ntsuas siab dua. .
Ntu 7: AD7606 Chip ADC TRANSFER FUNCTION
Cov zis coding ntawm AD7606 yog ob qhov ntxiv. Cov qauv kev hloov pauv tau tshwm sim nyob nruab nrab ntawm cov lej LSB qhov tseem ceeb, uas yog, 1/2 LSB thiab 3/2 LSB. LSB loj yog FSR/65,536 rau AD7606. Qhov zoo tshaj plaws hloov tus yam ntxwv rau AD7606 yog nyob rau hauv daim duab 7-1.
Ntu 8: Interface txhais (Lub npe tus pin ntawm PCB yog tus pin 1)
| Pin | Lub Npe Lub Npe | Kev piav qhia | Pin | Lub Npe Lub Npe | Kev piav qhia |
| 1 | GND | Hauv av | 2 | VCC | + 5 V |
| 3 | OS 1 | oversampling Xaiv |
4 | OS 0 | oversampling Xaiv |
| 5 | CONVSTAB | Kev hloov ntaub ntawv | 6 | OS 2 | oversampling Xaiv |
| 7 | RD | Nyeem | 8 | RESET | Rov pib dua |
| 9 | LAG LUAM | Tsis khoom | 10 | CS | Chip Xaiv |
| 11 | 12 | FIRSTDATA | Thawj cov ntaub ntawv | ||
| 13 | 14 | ||||
| 15 | DB 0 | AD Data Bus | 16 | DB 1 | AD Data Bus |
| 17 | DB 2 | AD Data Bus | 18 | DB 3 | AD Data Bus |
| 19 | DB 4 | AD Data Bus | 20 | DB 5 | AD Data Bus |
| 21 | DB 6 | AD Data Bus | 22 | DB 7 | AD Data Bus |
| 23 | DB 8 | AD Data Bus | 24 | DB 9 | AD Data Bus |
| 25 | DB 10 | AD Data Bus | 26 | DB 11 | AD Data Bus |
Ntu 9: AN706 Module Kev sim txheej txheem
- Ua ntej, txuas lub AN706 module rau 34-pin tus qauv nthuav dav chaw nres nkoj ntawm ALINX FPGA Development Board (Yog tias lub rooj tsav xwm txhim kho tau tawm).
- Txuas koj lub teeb liab qhov chaw rau AN706 Module input connector (Ceeb toom: AD port input range: -5V ~ + 5V).
- Download tau qhov kev pab cuam mus rau FPGA siv Quartus II lossis ISE software (yog tias koj xav tau cov kev sim, xa email rau rachel.zhou@alinx.com.cn).
- Qhib lub serial debugging pab cuab tam thiab teeb tsa kev sib txuas lus baud tus nqi ntawm qhov chaw nres nkoj serial raws li hauv qab no
Daim duab 9-1: Serial Debugging Assistant Tool - Qhov voltage tus nqi ntawm 8-channel teeb liab tawm tswv yim ntawm AN706 module yuav tshwm sim hauv kev sib txuas lus serial. (Vim cov ntaub ntawv 8-txoj kev yog tso tawm nyob rau hauv ib kab nyob rau hauv lub serial debugging pab, peb yuav tsum tau kom loj lub interface.)
Daim duab 9-2: Serial Communication
Cov ntaub ntawv saum toj no yog 8 raws ntawm cov ntaub ntawv tsis muaj teeb liab tawm tswv yim, vim tias AD teeb liab tawm tswv yim nyob hauv lub xeev ntab, thiab AD hloov pauv cov ntaub ntawv tso tawm yog li 1.75V.
Example: Yog tias koj txuas cov tswv yim ntawm channel 1 nrog 3.3V xeem tus pin ntawm AN706 module nrog DuPont kab los ntsuas qhov vol.tage ntawm 3.3V ntawm lub module.
Daim duab 9-3: Channel 1 nrog 3.3V test pin
Lub sijhawm no, cov ntaub ntawv ntsuas ntawm AD1 tso tawm ntawm qhov sib txuas sib txuas yog txog +3.3074.
Daim duab 9-4: Test pin voltage tso saib ntawm serial interface
Ntu 10: AN706 Module Ntsuas Qhov tseeb
Los ntawm kev ntsuas qhov siv voltage thiab cov high-precision voltmeter, qhov tseeb ntsuas qhov tseeb ntawm AD706 module yog nyob rau hauv 0.5mV nyob rau hauv lub -5V rau +5V voltage input ntau.
Cov lus hauv qab no qhia cov txiaj ntsig ntawm yim channel rau plaub analog voltages. Thawj kab yog cov ntaub ntawv ntsuas los ntawm high-precision digital multimeter, thiab yim kab kawg yog cov txiaj ntsig ntawm AD module's AD module ntsuas.
Table 10-1: Test Voltage
Hauv qhov kev sim no niaj hnub, cov oversampling override pab lim tsis siv los txhim kho qhov tseeb ntawm AN706 module. Rau cov neeg siv uas xav mus ntxiv txhim kho qhov tseeb ntawm sampling thiab sampling ceev tsis siab, nws tuaj yeem teeb tsa hauv qhov program. Txoj kev sampling magnification, koj tuaj yeem teem lub oversampling ratio nyob rau hauv qhov kev pab cuam.
Ntu 11: AN706 Module test program piav qhia
Cov hauv qab no yog cov lus piav qhia luv luv ntawm cov tswv yim rau txhua qhov kev xeem Verilog, thiab cov neeg siv tuaj yeem xa mus rau cov lus piav qhia hauv cov cai.
- Cov kev pab cuam saum toj kawg nkaus: ad706_test.v
Txhais cov FPGA thiab AN706 modules thiab qhov chaw nres nkoj serial kom tau txais thiab xa cov teeb liab tawm tswv yim thiab tso tawm, thiab ua kom peb lub subroutines instantiate (ad7606.v, volt_cal.v thiab uart.v). - AD data acquisition program: ad7606.v
Raws li lub sijhawm ntawm AD7606, sample 16 analog signals AD hloov dua siab tshiab 16-ntsis cov ntaub ntawv. Qhov kev pab cuam thawj zaug xa cov teeb liab CONVSTAB mus rau AD7606 kom pib AD cov ntaub ntawv hloov dua siab tshiab, thiab tos rau lub teeb liab Busy mus qis los nyeem cov ntaub ntawv ntawm AD channel 1 mus rau channel 16 hauv ib ntus.
AD Voltage Conversion (1 LSB) = 5V / 32758 = 0.15 mV
- Voltage conversion program rau AD cov ntaub ntawv: volt_cal.v Qhov kev pab cuam hloov 16-ntsis cov ntaub ntawv sau los ntawm ad7606.v, Bit[15] rau hauv cov cim zoo thiab tsis zoo, thiab Bit [14: 0] ua ntej hloov nws mus rau hauv vol.tage tus nqi los ntawm cov qauv hauv qab no, thiab tom qab ntawd hloov cov hexadecimal voltage tus nqi rau hauv 20-tus lej BCD code.
- Serial chaw nres nkoj xa kev pab cuam: uart.v Sijhawm xa 8 raws ntawm voltage cov ntaub ntawv rau PC los ntawm uaart. Qhov chaw nres nkoj serial lub sijhawm xa mus yog tau los ntawm kev faib cov zaus ntawm 50Mhz, thiab tus nqi baud yog 9600bps.
Cov ntaub ntawv / Cov ntaub ntawv
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ALINX AN706 Ib Simultaneous Sampling Multi-Channels 16-ntsis AD Module [ua pdf] Tus neeg siv phau ntawv AN706 Ib Simultaneous Sampling Multi-Channels 16-Ntsis AD Module, AN706, Simultaneous Sampling Multi-Channels 16-Bits AD Module, Sampling Multi-Channels 16-Bits AD Module, Ntau Channel 16-Bits AD Module, 16-Bits AD Module, AD Module, Module |