DA analog quantity output board card

Abstract

The utility model discloses a DA analog quantity output board card which comprises a programmable logic device U1, the input end of the programmable logic device U1 is connected with an input J1 interface through a PCI bus, and the output end of the programmable logic device U1 is respectively connected with a digital isolator U4, a digital isolator U7, a digital isolator U11, a digital isolator U12, a crystal oscillator Y2, a reset chip U3 and a flash memory chip U2. The digital isolator U4 and the digital isolator U7 are connected with the input end of the D / A converter U5, the output ends of the digital isolator U11 and the digital isolator U12 are connected with the input end of the D / A converter U6, and the output ends of the D / A converter U5 and the D / A converter U6 are respectively connected with the output interface J2. And 16-path analog quantity output is realized through a D / A conversion module and a PCI (Peripheral Component Interconnect).

Description

Technical Field

[0001] The utility model relates to a DA analog quantity output board card. Background Art

[0002] The main frame of the existing D / A (analog output) board usually uses Xilinx's FPGA and imported D / A conversion chips to complete the board functions. The main components are not domestically produced and are easily restricted. For example, the announcement number CN208903100U, a total temperature sensor data acquisition card based on the PCI bus, uses FPGA, PCI bridge chip, and forms 4 AI analog inputs and 4 AO analog outputs IO through the PCI interface, but uses FPGA as the main board chip, which makes it easily restricted. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a DA analog output board.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides a DA analog output board, comprising a programmable logic device U1, the input end of the programmable logic device U1 is connected to an input J1 interface through a PCI bus, and the output end is respectively connected to a digital isolator U4, a digital isolator U7, a digital isolator U11, a digital isolator U12, a crystal oscillator Y2, a reset chip U3, and a flash memory chip U2; the digital isolator U4 and the digital isolator U7 are connected to the input end of a D / A converter U5, the output ends of the digital isolator U11 and the digital isolator U12 are connected to the input end of a D / A converter U6, and the output ends of the D / A converter U5 and the D / A converter U6 are respectively connected to the output interface J2.

[0006] Furthermore, the programmable logic device U1 is also connected to the output end of the power converter. The input end of the power converter is connected to a 5V voltage, and the output end outputs 3.3V, 1.8V, and 1.0V voltages respectively.

[0007] Furthermore, the PCI bus is a 3U CompactPCI interface bus.

[0008] Furthermore, the model of the programmable logic device U1 is XC7K325T-2FFG676, which is used to generate the control timing required by the D / A converter, and then output the required analog voltage through the D / A converter.

[0009] Furthermore, the D / A converter is B5630, which is used to output analog voltage.

[0010] Furthermore, the digital isolator is B140E0, which is used to convert and isolate the communication information between the D / A converter and the programmable logic device.

[0011] The reset chip is SM706T, which provides a reset signal for the programmable logic device to enable it to enter a stable working state.

[0012] Furthermore, the flash memory chip is EFM25F128A, which is used to store the control program of the programmable logic device.

[0013] The beneficial effects of the utility model are: using a programmable logic device as the core of the board, it is not restricted by the chip, and 16-channel analog output is achieved through the D / A conversion module and PCI. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a circuit structure diagram of the utility model;

[0015] Figure 2 It is a circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0017] A DA analog output board comprises a programmable logic device U1, wherein the input end of the programmable logic device U1 is connected to an input interface J1 through a PCI bus, and the output end is respectively connected to a digital isolator U4, a digital isolator U7, a digital isolator U11, a digital isolator U12, a crystal oscillator Y2, a reset chip U3, and a flash memory chip U2; the digital isolator U4 and the digital isolator U7 are connected to the input end of a D / A converter U5, the output ends of the digital isolators U11 and U12 are connected to the input end of a D / A converter U6, and the output ends of the D / A converter U5 and U6 are respectively connected to an output interface J2.

[0018] like Figure 2As shown, the present invention is based on a 3U CompactPCI interface bus, and provides 16 independent D / A (analog output) channels through two 8-way D / A converters, with a voltage output range of ±10V, and the voltage output range can be selected by channel configuration, with 16-bit high resolution. The main frame programmable logic device U1, crystal oscillator Y2, reset chip U3, flash memory chip U2, digital isolators U4, U7, U11, U12, D / A converters U5, U6, to complete the function of the board. The programmable logic device receives the PCI signal sent on the bus through the connector J1, and then isolates the exchanged data information through the digital isolator and outputs it to the D / A converter. The D / A converter converts the signal required to be output, and then outputs it to the outside through the connector J2. The crystal oscillator Y2 provides the system clock for the programmable logic device.

[0019] The programmable logic device U1 is also connected to the output end of the power converter. The input end of the power converter is connected to a 5V voltage, and the output end outputs 3.3V, 1.8V, and 1.0V voltages respectively.

[0020] The PCI bus is a 3U CompactPCI interface bus.

[0021] The programmable logic device U1 is of model XC7K325T-2FFG676, and is used to generate the control timing required by the D / A converter, and then output the required analog voltage through the D / A converter.

[0022] The D / A converter is B5630, which is used to output analog voltage.

[0023] The digital isolator is B140E0, which is used to convert and isolate the communication information between the D / A converter and the programmable logic device.

[0024] The reset chip is SM706T, which provides a reset signal for the programmable logic device to enable it to enter a stable working state.

[0025] The flash memory chip is EFM25F128A, which is used to store the control program of the programmable logic device.

Claims

1. A DA analog output board, characterized in that: It includes a programmable logic device U1, the input end of the programmable logic device U1 is connected to the input interface J1 through a PCI bus, and the output end is respectively connected to a digital isolator U4, a digital isolator U7, a digital isolator U11, a digital isolator U12, a crystal oscillator Y2, a reset chip U3, and a flash memory chip U2; the digital isolator U4 and the digital isolator U7 are connected to the input end of a D / A converter U5, the output ends of the digital isolator U11 and the digital isolator U12 are connected to the input end of a D / A converter U6, and the output ends of the D / A converter U5 and the D / A converter U6 are respectively connected to the output interface J2.

2. The DA analog output board as claimed in claim 1, characterized in that: The programmable logic device U1 is also connected to the output end of the power converter. The input end of the power converter is connected to a 5V voltage, and the output end outputs 3.3V, 1.8V, and 1.0V voltages respectively.

3. The DA analog output board as claimed in claim 1, characterized in that: The PCI bus is a 3U CompactPCI interface bus.

4. The DA analog output board as claimed in claim 1, characterized in that: The programmable logic device U1 is of model XC7K325T-2FFG676, and is used to generate the control timing required by the D / A converter, and then output the required analog voltage through the D / A converter.

5. The DA analog output board as claimed in claim 1, characterized in that: The D / A converter is B5630, which is used to output analog voltage.

6. The DA analog output board as claimed in claim 1, characterized in that: The digital isolator is B140E0, which is used to convert and isolate the communication information between the D / A converter and the programmable logic device.

7. The DA analog output board as claimed in claim 1, characterized in that: The reset chip is SM706T, which provides a reset signal for the programmable logic device to enable it to enter a stable working state.

8. The DA analog output board as claimed in claim 1, characterized in that: The flash memory chip is EFM25F128A, which is used to store the control program of the programmable logic device.

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