EVAL-AD7877EBZ Analog Devices Inc, EVAL-AD7877EBZ Datasheet
EVAL-AD7877EBZ
Specifications of EVAL-AD7877EBZ
Related parts for EVAL-AD7877EBZ
EVAL-AD7877EBZ Summary of contents
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... PC. An on-board USB controller IC interfaces directly to the AD7877 and gives the evaluation software full control of the AD7877 registers. A MicroTouch touch screen is included in this evaluation kit and can be plugged directly into the AD7877 evaluation board. This evaluation board contains the following main components that can be identified from the block diagram in Figure 1 ...
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... J2-1 J2-2 J2-3 J2-4 J12-2 J12-4 J12-1 J12-3 Figure 1. AD7877 Evaluation Board Block Diagram CONNECTOR FUNCTION DESCRIPTIONS Description These screw-top connectors can be used to supply V To supply an external V , Link 4 should be in the B position, and the signal applied REF to J15-1. To supply an external V signal applied to J15-2. ...
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... REF left open or in Position B with J15-1 left floating. This jumper selects the input power for the evaluation board. If the jumper is in Position A, power for the board must be supplied through Connector J13. If the link is in Position B, the USB connection supplies the power for the board. ...
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... CD-ROM drive. To finish installing the software, follow the on screen instructions. RUNNING THE SOFTWARE When using the software, first ensure the evaluation board is connected to the PC via the USB cable. To run the software, select Start/Programs/Analog Devices/AD7877 Eval Software. When the program is started, the About screen, shown in Figure 2, is displayed ...
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... PC and the board is active. If this dot is red, the connection is not functional. In this situation, the user should check that the USB port on their PC is con- figured correctly and that the evaluation board is connected via the USB connector to the PC. Reading and Writing to the Registers The register access screen gives access to all the registers on the AD7877. A map of the AD7877’ ...
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... EVAL-AD7877 Figure 4. Accessing the TEMP2 Register Figure 5. Accessing the Y+ Register –6– REV. Sp0 ...
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... The limits may be changed by dragging the limit bars up or down. The new limits are automatically written to the relevant AD7877 registers by the evaluation software. The AUX1, BAT1, BAT2, and Temp1 channels all have upper and lower limits. Also displayed next to these channels in the list is an ALERT button. If the button is green, the channel’ ...
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... Easy Setup Clicking on the Easy Setup button at the bottom of the Visual Display screen sets the AD7877 up and running. The evaluation software writes to the AD7877 to set up the registers. The software then programs the device to perform a measurement on each channel. The software reads back the result of each measurement before going on to the next and then this cycle is repeated ...
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... The user can change this to any value, with the minimum value being 5 ms. This is the default value. If monitoring is disabled, then the evaluation software stops reading data from the AD7877. Enable graphing: This controls whether the selected measure- ment is graphed on the graphing window ...
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... The STOPACQ input signal polarity can be selected by the user very important that the user selects the correct polar- ity for the signal applied to the STOPACQ input of the evaluation board. If the wrong polarity is selected, the ADC on the AD7877 will stop acquiring data and no new measurements will be made. ...
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... Figure 12. AD7877 Evaluation Board Schematic AD7877 Section REV. Sp0 DCLK AGND DOUT DGND DRIVE V Y+ RNG A X+ OUT A Y– REF V X– –11– EVAL-AD7877 ...
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... R15 100k 100k C15 0.1 F C24 + C11 10 F 0.1 F 10V DGND DGND DGND DIND CLK CS PENRIQ DOUT DAV DIN DCLK CS PENIRQ DOUT DAV Figure 13. AD7877 Evaluation Board Schematic USB Section C20 C21 C22 0.1 F 0.1 F 0.1 F DGND 0.1 F 3.3V 3. SCL 4 VSS ...
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... Figure 15. AD7877 Evaluation Board Component Side Artwork REV. Sp0 Figure 14. AD7877 Evaluation Board Silkscreen –13– EVAL-AD7877 ...
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... EVAL-AD7877 Figure 16. AD7877 Evaluation Board Solder Side Artwork Name Type C1, C6 CAP C2 to C5, C7, C9 CAP C8, C10 CAP+ C11, C15 to C23 CAP C12, C13 CAP C14 CAP+ C24 CAP+ D1, D2, D3 LED J2, J10, J13, J15 CON/POWER J3 to J9, J11 SMB J12 CON-SIP-4P_SMD J14 USB ...
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