DAC 7 Click-Platine

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

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