电子说
在电子设计领域,数字电位器的应用越来越广泛。今天,我们就来深入了解一下用于评估AD5292数字电位器的EVAL - AD5292DBZ评估板。
文件下载:EVAL-AD5292EBZ.pdf
AD5292是一款单通道、1024位置的数字电位器,端到端电阻容差误差小于±1%,拥有20次可编程(20 - TP)内存。它能够在高压下工作,支持±10.5 V至±16.5 V的双电源和21 V至33 V的单电源操作。采用的串行接口时钟速率高达50 MHz,与标准串行外设接口(SPI)兼容。
| 评估板供电:EVAL - AD5292DBZ评估板可通过系统演示平台(SDP)端口供电,也可通过P4连接器和P2连接器外部供电。各连接器的最大和最小电压如下表所示: | Connector No. | Label | Voltage |
|---|---|---|---|
| P4 - 1 | VDD | Analog positive power supply, V DD . Single supply from 21 V to 33 V. Dual supply from 10.5 V to 16.5 V. Dual supply through the ADP5071 , 5 V. | |
| P4 - 2 | GND | Analog ground. | |
| P4 - 3 | VSS | Analog negative power supply, V SS . Single supply operation of 0 V. Dual supply from −10.5 V to −16.5 V. | |
| P2 - 1 | VL | Digital supply, from 2.7 V to 5.5 V. | |
| P2 - 2 | GND | Digital ground. |
| EVAL - MB - HV - SDZ主板包含多个链接和开关选项,使用前必须进行设置。以下是部分链接选项的功能和默认位置: | Link No. | Label/Link Function | Default Position | Options |
|---|---|---|---|---|
| P11 | VIN | B | Selects the power supply, V IN , for the ADP5071 A: V_SINGLE (derived from VDD_EXT, external supply from the P4 connector) B: +5 V (5 V from SDP - B or SDP - S ) | |
| P1 | VL | B | Selects the logic power supply, V LOGIC A: VL_EXT (external supply from the P2 connector) B: VL3V3 (3.3 V from SDP - B or SDP - S ) | |
| JP3 | VDD | Not inserted | Selects the low voltage positive power supply, V DD_LV A: +5 V (5 V from SDP - B or SDP - S ) B: VDD_EXT (external supply from the P4 connector) C: VL3V3 (3.3 V from SDP - B or SDP - S ) | |
| P23 | VSS | Not inserted | Selects the low voltage negative power supply, V SS_LV A: VSS_EXT (external supply from the P4 connector) B: AGND | |
| P8 | VDD_HV | A | Selects the high voltage positive power supply, V DD_HV A: 15 V (+15 V from ADP5071 ) B: VDD_EXT (external supply from the P4 connector) | |
| JP4 | VSS_HV | A | Selects the high voltage negative power supply, V SS_HV A: −15 V (−15 V from ADP5071 ) B: VSS_EXT (external supply from the P4 connector) C: AGND | |
| P17 | A_LV | Not inserted | Selects the voltage at Terminal A for the low voltage digital potentiometer A: A_EXT (external supply from the P3 connector) B: VDD | |
| JP2 | B_LV | Not inserted | Selects the voltage at Terminal B for the low voltage digital potentiometer A: VSS B: AGND C: B_EXT (external supply from the P3 connector) | |
| P12 | A_HV | B | Selects the voltage at Terminal A for the high voltage digital potentiometer A: A_EXT (external supply from the P3 connector) B: VDD_HV | |
| JP1 | B_HV | A | Selects the voltage at Terminal B for the high voltage digital potentiometer A: VSS_HV B: AGND C: B_EXT (external supply from the P3 connector) | |
| P24 | Supply for ADP5071 | Inserted | Connects V IN to the supply terminal of ADP5071 | |
| P21 | A_HV channel links A1_HV A2_HV A3_HV A4_HV | Inserted Inserted Inserted Inserted | Connects Terminal A1 to A_HV Connects Terminal A2 to A_HV Connects Terminal A3 to A_HV Connects Terminal A4 to A_HV | |
| P18 | A_LV channel links A1_LV A2_LV A3_LV A4_LV | Not inserted Not inserted Not inserted Not inserted | Connects Terminal A1 to A_LV Connects Terminal A2 to A_LV Connects Terminal A3 to A_LV Connects Terminal A4 to A_LV | |
| P19 | B_LV channel links B1_LV B2_LV B3_LV B4_LV | Not inserted Not inserted Not inserted Not inserted | Connects Terminal B1 to B_LV Connects Terminal B2 to B_LV Connects Terminal B3 to B_LV Connects Terminal B4 to B_LV | |
| P25 | B_HV channel links B1_HV B2_HV B3_HV B4_hV | Inserted Inserted Inserted Inserted | Connects Terminal B1 to B_HV Connects Terminal B2 to B_HV Connects Terminal B3 to B_HV Connects Terminal B4 to B_HV | |
| P20 | Buffer connector W1_BUF W2_BUF W3_BUF W4_BUF | Inserted Inserted Inserted Inserted | Connects Terminal W1 to an output buffer Connects Terminal W2 to an output buffer Connects Terminal W3 to an output buffer Connects Terminal W4 to an output buffer |
评估板套件中的CD包含评估板软件,该软件与Windows® 7、Windows 8和Windows 10兼容。安装步骤如下:
软件主窗口有四个按钮:
主窗口还分为三个部分:
文档中提供了主板和子板的原理图、丝印图、组件布局图等,这些资料对于深入了解评估板的电路结构和设计非常有帮助。例如主板的SDP连接器和电源原理图、子板的原理图等,工程师可以根据这些图进行进一步的设计和调试。
文档详细列出了主板和子板的物料清单,包括各个元件的数量、参考标号、描述和零件编号。这对于采购和维修评估板非常有用。
总之,EVAL - AD5292DBZ评估板为工程师提供了一个全面、便捷的平台来评估AD5292数字电位器。无论是硬件设计还是软件操作,都有详细的说明和指导。大家在使用过程中有没有遇到过什么有趣的问题或者有什么独特的使用技巧呢?欢迎在评论区分享。
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