Diglient Pmod AD2 4-Channel 12-Bit A/D Converter

Features and Specifications

• Up to four 12-bit analog-to-digital converter channels
• On-board 2.048 V voltage reference
• Jumper selectable reference input
• 1.0 in × 0.8 in (2.5 cm × 2.0 cm) PCB size
• Pin header pins are spaced 100 mil apart
• Follows Digilent Pmod Interface Specification 1.0.0
• 3.3V Logic Level

The PmodAD2 is an analog-to-digital converter powered by the Analog Devices AD7991. Users may communicate with the board through I2C to configure up to 4 conversion channels at 12 bits of resolution. System boards are able to call the Pmod by sending out the device address of 0b0101000 followed by the appropriate read or write bit. If a write bit is chosen, users may then configure the on-board chip to only use certain channels or may immediately start reading the 12 bits of data from the 16-bit data register if the read bit is sent.

Unlike other devices that use I²C, no addresses are associated with these two registers; only the read/write bit at the end of the slave address distinguishes between the two registers. By default, all four channels have analog-to digital conversions performed on them sequentially with the supply voltage VCC acting as the voltage reference for the ADC.

Pmod Series Overview

The Digilent Pmod (peripheral module) Series is a small, low-cost peripheral module that can be used with a wide range of embedded systems and development boards. It is designed to extend the capabilities of embedded systems and development boards by adding new features and functionality. The Pmod communicates with host boards using 6, 8 or 12-pin connectors that can carry multiple digital control signals, taking advantage of standard serial protocols such as SPI and I²C. This allows for more effective designs by routing analog signals and power supplies only where they are needed and away from digital controller boards.

What's in the Box

• Pmod AD2
• Custom antistatic Pmod packaging