DAC 7 Click Board™

Product Code: MIKROE-3886

How Does The DAC 7 Click Board™ Work? The DAC 7 Click Board™ is an advanced 12-bit, four-channel digital to analogue converter (DAC). This device communicates with the main MCU through the is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. Also, there is a selectable voltage reference as well with onboard jumpers which makes this click more open for specific projects. The main active component on the DAC 7 Click Board™ is the AD5624R from Analog Devices. This is a low power, four-channel, 12-bit voltage output Digital-To-Analog Converter (DAC). It is specified monotonic by design across a wide power supply range from 2.7 V to 5.5 V. Using an external reference, the AD5624R provides a full-scale output voltage in the range from 0V to Vref, while consuming 0.1 mA quiescent current per channel. The AD5624R also includes per channel, user-programmable, power down registers facilitate the DAC output buffers to start in a power down to 10K state and remain in this state until a power-up command is issued to these output buffers.

The DAC 7 Click Board™ has a high precision voltage reference included onboard. For that purpose, we have used 4.096V precision voltage reference MCP1541 from Microchip. This little SOT23 device is stable with capacitive loads. It has regulations for both sink and source and is very accurate. This gives DAC 7 click good flexibility for use in various applications. Low quiescent current, wide power supply range, and per-channel power down option makes AD5624R ideal for low power, battery-operated system. The device communicates through the SPI interface. Besides the standard SPI, QSPI™, MICROWIRE™, and DSP interface standards are also supported. However, this click board™ is using standard SPI communication with the main MCU. The reference voltage level can be selected via VREF SEL jumper, between 4.096V and 5V. This allows for both 4.096V and 5V Voltage outputs from DAC 7 click can be connected through a 9-terminal block where the first is common GND and the last eight are VOUTA to VOUTH. The DAC 7 Click Board™ is designed to be operated only with a 5V logic level. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with logic levels of 3.3V. Specifications Type DAC Applications Suitable for programmable power supplies, programable window comparator, VCOM biasing in display panel, laser driver in multifunction printers, autofocus digital still camera lens, ATM machines, currency counters, barcode readers, IP network cameras, projectors On-board modules AD5624R- a low power, four-channel, 12-bit voltage output Digital-To-Analog Converter (DAC) from Analog Devices; and MCP1541 - a 4.096V precision voltage reference IC, from Microchip. Key Features High precision voltage reference, low power consumption, high-speed SPI interface, 12bit resolution, reference voltage selection Interface SPI Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 5V Pinout Diagram This table shows how the pinout on the DAC 7 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC NC 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC NC 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground Onboard settings and indicators Label Name Default Description JP1 VREF SEL Left DAC Reference Voltage Selection 4.096/5V, left position 4.096, right position 5V LD1