AD5142

• 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

With versatile programmability, the AD5142 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 read-back, and extra EEMEM for storing user-defined information, such as memory data for other components or a lookup table.

The AD5142 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 AD5142 uses a versatile SPI-compatible serial interface, allowing speeds of up to 50 MHz. 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 AD5142 part can be found in the AD5142 datasheet.

• Complete hardware and software required to evaluate ADA4355 micro-module
• Only four connections required
• 12V power, 5V power, USB, fiber under test
• All system control and measurement options provided via intuitive, user-friendly GUI

The ADA4355 is a complete, high performance, current input µModule^®. For space savings, the ADA4355 includes all required active and passive components to comprise a complete current-to-bits data acquisition channel supporting small form-factor optical modules as well as multi-channel systems.

The high-speed TIA of the device supports 10 ns pulse widths, allowing high spatial resolution for time-of-flight measurements. Additionally, the ADA4355 includes three TIA gain (T_Z) settings to maximize dynamic range. An internal, selectable, analog low-pass filter (LPF) can limit the device bandwidth with a corner frequency of 100 MHz to minimize broadband noise while also serving as an anti-aliasing filter for the 125 MSPS ADC. For lower bandwidth signals or wider signal pulses (e.g. 20μs or larger), the filter can be set to a corner frequency of 1.0 MHz to provide additional noise reduction.

The 14-bit ADC converts the amplified voltage signal at a rate of up to 125 MSPS and outputs the digitized signals through two serial, low voltage differential signaling (LVDS) data lanes, operating at rates of up to 1 Gbps per lane. The data clock output (DCO) operates at frequencies of up to 500 MHz and supports double data rate (DDR) operation.

The ADA4355 exhibits fast overdrive recovery from a large input current signal and is available in a 12 mm × 6mm CSP_BGA package with a −40°C to +85°C operating temperature range.

Applications

• Current-to-voltage Conversion
• Chemical analyzers
• Mass spectroscopy
• Time of Flight (ToF)
• Fiber optic sensing

• Full featured evaluation board for the AD5142 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., EVAL SDP-CK1Z (SDP-K1) controller board

This user guide describes the evaluation board for evaluating the AD5142—a digital potentiometer with 256 positions and nonvolative memory. With versatile programmability, the AD5142 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 elec tronically erasable programmable read‐only memory (EEPROM) for storing user-defined information, such as memory data for other components or a lookup table.

The AD5142 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 applica tions. The EVAL-MB-LV-ARDZ incorporates an internal power sup ply from the USB and provides on-board +5V, +3V, +2.5V/−2.5V supplies to the EVAL-AD5142-2DBZ.

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 EVAL-AD5142-2DBZ product page. This software enables the user to program the AD5142. 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 AD5142 part can be found in the AD5142 data sheet, which is available from Analog Devices, and must be consulted in conjunction with this user guide when using the evaluation board.