AD5142A

• 可配合低压digiPOT母板(EVAL-MB-LV-SDZ)使用的全功能评估板
• 各种测试电路
• 各种交流/直流输入信号
• 通过单独购买的系统演示平台（SDP-B或SDP-S）进行PC控制
• PC控制软件

AD5142A支持多种工作模式，包括对RDAC和EEMEM寄存器进行读/写访问、电阻递增/递减、±6 dB电阻量程变化和游标设置回读，同时提供额外的EEMEM，用于存储用户定义信息，如其他元件的存储器数据或查找表。

AD5142A支持±2.25 V至±2.75 V双电源和2.3 V至5.5 V单电源供电，适合电池供电应用及许多其它应用。此外，AD5142A采用多功能I2C兼容串行接口，可在快速模式下工作，工作速率高达400 kbps，支持选择多达九个不同的I2C地址。EVAL-AD5142DBZ可在单电源或双电源模式下工作，从USB内部电源供电。

可在AD5122A / AD5142A数据手册中找到AD5142A的完整规格。

• Full featured evaluation board for the AD5142A in conjunction with low voltage digital potentiometer (digiPOT) motherboard (EVAL-MB-LV-ARDZ)
• Various test circuits
• Various power solutions
• Various AC/DC input signals
• PC control in conjunction with the Analog Devices, Inc., EVALSDP-CK1Z (SDP-K1) controller board

This user guide describes the evaluation board for evaluating the AD5142A—a digital potentiometer with 256 positions and nonvolative memory. With versatile programmability, the AD5142A allows multiple modes of operation, including read/write access in the RDAC and EEPROM registers, increment/decrement of resistance, resistance changes in ±6 dB scales, wiper setting readback, and extra electronically erasable programmable read‐only memory (EEPROM) for storing user-defined information, such as memory data for other components or a lookup table.

The AD5142A supports a dual supply (±2.25V to ±2.75V) operation and a single supply (+2.3V to +5.5V) operation, making the device suitable for battery-powered applications and many other applications. The EVAL-MB-LV-ARDZ incorporates an internal power supply from the USB and provides on-board +5V, +3V, +2.5V/−2.5V supplies to the EVAL-AD5142A-2DBZ.

The EVAL-MB-LV-ARDZ interfaces with the USB port of a PC via the system demonstration platform (SDP-K1) controller board. The ACE software is available for download on the EVALAD5142A-2DBZ product page. This software enables the user to program the AD5142A. A peripheral module interface (PMOD) connection is also available that allows the connection of different microcontrollers to the EVAL-MB-LV-ARDZ without the SDP-K1 controller board. Note that when a microcontroller is used through the PMOD connection, the SDP-K1 board must be disconnected, and the user cannot use the ACE software.

Complete specifications for the AD5142A part can be found in the AD5142A data sheet, which is available from Analog Devices, and must be consulted in conjunction with the user guide when using the evaluation board.