The document details the architecture of the Venus data acquisition system for the WAQM project, outlining its functional blocks, including sensors, signal conditioning, and data processing. Key specifications and signal outputs are provided, including input/output voltage ranges and cutoff frequencies for differential and common-mode signals. Additionally, it includes power supply requirements and system component placement within the PCB layout.

1. The Architecture of VENUS Data
Acquisition System for WAQM
Project
By - Surya Raj

2. Functional Block Diagram
Sensors
Signal
Conditioning
` Data
Processing
Power
Supply
DAQ Device
Electrical
Signal to
Voltage
Filter
NetworkingData
Monitoring
Input
MUX
PGA
Digital
Filter
SPIADC
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3. Schematic
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4. Sensor Output to Voltage
Input Specs
1. 4 to 20 mA dc (6 Ch)
2. 0 to 10 V dc (6 Ch)
I2V: 4-20 mA (in) -> 0.4-2V (out) V2V: 0-10 V (in) -> 0-2.09 V (out)
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5. Schematic
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6. Input Filters
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Differential-mode signal –3 dB cutoff frequency ,
fDIF = 1 / [2π · (RF1 + RF2) · (CDIF1 + CCM1|| CCM2)] ≈ 3.4K Hz
Common-mode signal –3 dB cutoff frequency ,
fCM = 1 / (2π · RF1 · CCM1) = 1 / (2π · RF2 · CCM2) ≈ 34M Hz

7. Schematic
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8. Power Supply
Input
(FPGA)
Output (ADC)
Specifications:
Available Input: 3.3 V, up to1A (FPGA)
Required Output: 5 V & 3.3 V (ADC)
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9. System Component Placement
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->PCB ->Analog Plane ->Digital Plane ->Power Supply ->AGND=DGND

10. Thank You!!
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