ADAC click

ADAC click is an 8-channel 12-bit ADC, DAC and GPIO. It carries the AD5593R configurable ADC/DAC. The click is designed to run on either 3.3V or 5V power supply. ADAC click communicates with the target microcontroller over I2C interface, with additional functionality provided by the RST pin on the mikroBUS™ line.

How it works

Every channel can be set individually as ADC, DAC, or GPIO. The 12-bit conversion values are readable through I2C. 

For resetting the IC, use the Reset pin (RST).

AD5593R IC features

The AD5593R has eight input/output (I/O) pins, which can be independently configured as digital-to-analog converter (DAC) outputs, analog-to-digital converter (ADC) inputs, digital outputs, or digital inputs. When an I/O pin is configured as an analog output, it is driven by a 12-bit DAC. The output range of the DAC is 0 V to VREF or 0 V to 2×V REF.

When an I/O pin is configured as an analog input, it is connected to a 12-bit ADC via an analog multiplexer. The input range of the ADC is 0 V to VREF or 0 V to 2 × VREF. The I/O pins can also be configured to be general-purpose, digital input or output (GPIO) pins.

Specifications

Key features

• AD5593R configurable ADC/DAC
  • 8 12-bit DAC channels
  • 8 12-bit ADC channels
  • 8 general-purpose I/O pins
• I2C interface
• 3.3V or 5V power supply

Pinout diagram

This table shows how the pinout on ADAC click 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
Active low IC reset	RST	2	RST	INT	15	NC
	NC	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C serial clock
	NC	6	MOSI	SDA	11	SDA	I2C serial data
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Additional pins

Jumpers and settings

Programming

Code examples for ADAC click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet demonstrates the use of ADAC click library functions. It will first set a pin as an analog output, showing DAC function, and will then set a different pin as an analog input, showing ADC operation.

01 UART1_Write_Text ("rnrnStarting DAC Operation...");
02         Delay_ms (1000);
03         //Sets the IO3 pin as DAC
04         ADAC_setConfiguration (_ADAC_DAC_CONFIG, _ADAC_NULL, _ADAC_IO3);
05         //Rises the DAC output on IO3 from 0 to VREF
06         for (i = 0; i < 0xFFF; i+=4)
07         {
08             ADAC_writeDAC (_ADAC_DAC_WRITE | _ADAC_PB_PIN3, i/0x100, i%0x100);
09             Delay_ms (10);
10         }
11         UART1_Write_Text ("rnDAC Operation finishedrn");
12         Delay_ms (1000);
13
14
15        UART1_Write_Text ("rnStarting ADC Operation...");
16         Delay_ms (1000);
17         //Sets the IO4 pin as ADC
18         ADAC_setConfiguration (_ADAC_ADC_CONFIG, _ADAC_NULL, _ADAC_IO4);
19         //Sets the ADC sequence repetition to enabled, and adds IO4 to sequence
20         ADAC_setConfiguration (_ADAC_ADC_SEQUENCE, _ADAC_SEQUENCE_ON, _ADAC_IO4);
21         //Reads the ADC input, and writes it to UART1
22         for (i = 0; i < 8; i++)
23         {
24             ADCValue = ADAC_readADC ( _ADAC_ADC_READ, &channel );
25             ShortToStr (channel, uartText);
26             UART1_Write_Text ("rnRead value from channel");
27             UART1_Write_Text (uartText);
28
29
30            IntToStr (ADCValue, uartText);
31             UART1_Write_Text (": ");
32             UART1_Write_Text (uartText);
33             Delay_ms (2000);
34         }
35
36        UART1_Write_Text ("rnADC Operation finished");
37         Delay_ms (1000);