CN205484608U - High accuracy ADC measuring automatic testing platform - Google Patents
High accuracy ADC measuring automatic testing platform Download PDFInfo
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- CN205484608U CN205484608U CN201620216773.8U CN201620216773U CN205484608U CN 205484608 U CN205484608 U CN 205484608U CN 201620216773 U CN201620216773 U CN 201620216773U CN 205484608 U CN205484608 U CN 205484608U
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Abstract
The utility model discloses a high accuracy ADC measuring automatic testing platform, including PC, power adapter, high accuracy ADC simulation ability comprehensive tester, branching unit and multi -socket outlet aassessment board connector. The utility model aims to provide an one set of high accuracy ADC measuring automatic testing platform in order to reduce the inconvenience that the operation brought in the manual test, designs the ADC test system board that a section can the automatic testing, adopts high accuracy DAC to replace sensor and potentiometer as the input of signal source as the signal source, tests ADC's main performance parameter, like offset error, gain error, nonlinearity, operating voltage rejection ratio and common -mode input rejection ratio etc. The differential input mode has been adopted to support multistage PGA to enlarge, the input common -mode signal is adjustable, and measured device power digit is adjustable. As long as through USB company go up host computer software alright test in order to realize automizing.
Description
Technical field
This utility model relates to a kind of data transmission module, the automatically testing platform that a kind of high-precision adc is measured.
Background technology
Along with the precision of ADC improves constantly, high-precision adc is surveyed quantifier elimination and also gets more and more.For the measurement of high-precision adc, the high accuracy of especially more than 16, it is easy to affected by environment, and the impact of manual operation, measure parameter and deviation probably occurs.The most conventionally employed most be high precision electro tentiometer, when measuring temperature characterisitic, often occur in the middle of several data, have some deviations big.Influence factor is a lot, main because of have: potential difference meter and the interface of ADC, the switching accuracy of potential difference meter and moving of wiring.
Utility model content
The purpose of this utility model is the automatically testing platform providing a kind of high-precision adc to measure, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
The automatically testing platform that a kind of high-precision adc is measured, including PC, power supply adaptor, high-precision adc simulated performance comprehensive tester, shunt and adaptor/evaluation board adapter, described high-precision adc simulated performance comprehensive tester connects shunt, PC, power supply adaptor and monolithic test jack/evaluation board respectively, being also connected with multiple adaptor/evaluation board adapter on described shunt, described adaptor/evaluation board adapter is also connected with multiple socket/evaluation board；
nullAs preferred version of the present utility model: described high-precision adc simulated performance comprehensive tester includes numeral adjustable reference module、Power-supply system、Basis reference module、20 high accuracy DAC、Single-ended transfer difference circuit、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit and measured device analog interface，Microcontroller connects numeral adjustable reference module respectively、Power-supply system、20 high accuracy DAC、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit，Described gain selects slowdown monitoring circuit to be also respectively connected with common-mode point control circuit and measured device analog interface，Power-supply system is also respectively connected with numeral adjustable reference module and basis reference module，20 high accuracy DAC are also connected with single-ended transfer difference circuit，Single-ended transfer difference circuit is also connected with common-mode point control circuit.
As preferred version of the present utility model: this utility model can also realize many built-in testings by shunt and extend.
Compared with prior art, the beneficial effects of the utility model are: this utility model aims to provide the automatically testing platform that a set of high-precision adc is measured, the inconvenience brought is operated on manual test in order to reduce, design a ADC testing system board that can automatically test, high accuracy DAC is used to replace the input as signal source of sensor and potential difference meter as signal source, the Specifeca tion speeification of test ADC, such as offset error, gain error, non-linear, running voltage rejection ratio and common mode input constraint ratio etc..Have employed Differential Input mode, and support that multistage PGA amplifies, input common-mode signal is adjustable, and measured device power supply numeral is adjustable.As long as connecting upper computer software by USB just can realize automatic test.
Accompanying drawing explanation
Fig. 1 is overall structure block diagram of the present utility model；
Fig. 2 is the structured flowchart of high-precision adc simulated performance comprehensive tester.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1-2, in this utility model embodiment, the automatically testing platform that a kind of high-precision adc is measured, including PC, power supply adaptor, high-precision adc simulated performance comprehensive tester, shunt and adaptor/evaluation board adapter, described high-precision adc simulated performance comprehensive tester connects shunt, PC, power supply adaptor and monolithic test jack/evaluation board respectively, being also connected with multiple adaptor/evaluation board adapter on described shunt, described adaptor/evaluation board adapter is also connected with multiple socket/evaluation board；
nullHigh-precision adc simulated performance comprehensive tester includes numeral adjustable reference module、Power-supply system、Basis reference module、20 high accuracy DAC、Single-ended transfer difference circuit、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit and measured device analog interface，Microcontroller connects numeral adjustable reference module respectively、Power-supply system、20 high accuracy DAC、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit，Described gain selects slowdown monitoring circuit to be also respectively connected with common-mode point control circuit and measured device analog interface，Power-supply system is also respectively connected with numeral adjustable reference module and basis reference module，20 high accuracy DAC are also connected with single-ended transfer difference circuit，Single-ended transfer difference circuit is also connected with common-mode point control circuit.
This utility model can also realize many built-in testings by shunt and extend.
Operation principle of the present utility model is: Fig. 1 gives high-precision adc test platform architecture.This platform can coordinate upper computer software to realize automatic test control, it is also possible to realizes many built-in testings by shunt and extends.Fig. 2 gives the fundamental block diagram of high-precision adc test platform.Whole test platform has a high-precision basis reference, to ensure power supply and other benchmark degree of accuracy of system.Power-supply system comprises adjustable digital power supply and the analog power of measured device, and master control power supply and each modular power source.Numeral adjustable reference can be used for 20 high accuracy DAC references in measured device ADC reference, the common-mode voltage of high-precision adc test platform differential analog signal and system.20 high accuracy DAC provide the signal of high-accuracy high-resolution for system, it is contemplated that high-precision adc is the most all differential signal, and carries PGA amplifying circuit, so system needs to change into signal differential signal, and common-mode point is adjustable.Gain selection circuit is corresponding PGA amplifying circuit, signal dividing potential drop is reduced, minification correspondence PGA amplification.Usb circuit is for realizing the communication of micro controller and upper computer software.Test data and test parameter when memorizer is for preserving test platform off line are arranged.Microcontroller is used for controlling modules work, controls and test data collection according to the test and excitation being provided with measured device.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (2)
1. the automatically testing platform that a high-precision adc is measured, including PC, power supply adaptor, high-precision adc simulated performance comprehensive tester, shunt and adaptor/evaluation board adapter, it is characterized in that, described high-precision adc simulated performance comprehensive tester connects shunt, PC, power supply adaptor and monolithic test jack/evaluation board respectively, being also connected with multiple adaptor/evaluation board adapter on described shunt, described adaptor/evaluation board adapter is also connected with multiple socket/evaluation board.
nullThe automatically testing platform that high-precision adc the most according to claim 1 is measured，It is characterized in that，Described high-precision adc simulated performance comprehensive tester includes numeral adjustable reference module、Power-supply system、Basis reference module、20 high accuracy DAC、Single-ended transfer difference circuit、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit and measured device analog interface，Microcontroller connects numeral adjustable reference module respectively、Power-supply system、20 high accuracy DAC、Common-mode point control circuit、Gain selection circuit、Measured device digital interface、Memorizer、Usb circuit，Described gain selects slowdown monitoring circuit to be also respectively connected with common-mode point control circuit and measured device analog interface，Power-supply system is also respectively connected with numeral adjustable reference module and basis reference module，20 high accuracy DAC are also connected with single-ended transfer difference circuit，Single-ended transfer difference circuit is also connected with common-mode point control circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620216773.8U CN205484608U (en) | 2016-03-21 | 2016-03-21 | High accuracy ADC measuring automatic testing platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620216773.8U CN205484608U (en) | 2016-03-21 | 2016-03-21 | High accuracy ADC measuring automatic testing platform |
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| CN205484608U true CN205484608U (en) | 2016-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811981A (en) * | 2016-03-09 | 2016-07-27 | 深圳市博巨兴实业发展有限公司 | Automatic test platform for high-precision ADC measurement |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811981A (en) * | 2016-03-09 | 2016-07-27 | 深圳市博巨兴实业发展有限公司 | Automatic test platform for high-precision ADC measurement |
| CN105811981B (en) * | 2016-03-09 | 2019-07-26 | 深圳市博巨兴实业发展有限公司 | A kind of automatic test equipment of high-precision adc measurement |
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Address after: 518051 Shenzhen Nanshan District, Guangdong Province, Guangdong Province, Yuehai Street High-tech Zone Community Science and Technology South Road 18 Shenzhen Bay Science and Technology Eco-Park 12 Skirt Building 732 Patentee after: Shenzhen Bojuxing Microelectronics Technology Co., Ltd. Address before: 518000 4th Floor, New Material Port D(4) Building, No.2 Changyuan New Material Port, Zhongxin Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Bojuxing Industrial Development Co., Ltd. |