AD5142A

• Full featured evaluation board in conjunction with low voltage digiPOT motherboard (EVAL-MB-LV-SDZ)
• Various test circuits
• Various ac/dc input signals
• PC control via a separately purchased system demonstration platform (SDP-B or SDP-S)
• PC software for control

The AD5142A allows multiple modes of operation, including read/write access in the RDAC and EEMEM registers, increment/decrement of resistance, resistance changes in ±6 dB scales, wiper setting readback, and extra EEMEM for storing user-defined information, such as memory data for other components or a lookup table.

The AD5142A supports a dual-supply ±2.25 V to ±2.75 V operation and a single-supply 2.3 V to 5.5 V operation, making the device suitable for battery-powered applications and many other applications. In addition, the AD5142A uses a versatile I²C-compatible serial interface that operates in fast mode, allowing speeds of up to 400 kbps and supporting the selection of up to nine different I²C addresses. The EVAL-AD5142DBZ can operate in single-supply or dual-supply mode and incorporates an internal power supply from the USB.

Complete specifications for the AD5142A can be found in the AD5122A / AD5142A datasheet.

• 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.