The DAC 5 Click Board™ is an advanced 10-bit eight-channel digital to analog converter (DAC). This device communicates with the main MCU through the I2C interface, supporting the standard mode (100 kbps), fast mode (400 kbps), and fast+ mode (1 Mbps). Also, there is a selectable voltage reference as well with onboard jumpers which makes this click more open for specific projects. I2C address can be selected with a cross-shaped jumper if such option is needed. DAC 5 click allows fine tuning to meet any specific project in mind.
How Does The DAC 5 Click Board™ Work?
DAC53608 from Texas Instruments is the main active component onboard on DAC 5 click. This is a low power, eight channel, 10-bit voltage output Digital-To-Analog Convertor (DAC). It is specified monotonic by design across a wide power supply range from 1,8 V to 5,5 V. Using an external reference, the DAC53608 provides a full-scale output voltage in the range from 0V to Vref, while consuming 0,1 mA quiescent current per channel. The DAC53608 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 5 Click Board™ has a high precision voltage reference included onboard. For that purpose, MAX6106 is used, a 2.048V voltage reference IC, from Maxim Integrated. This little SOT23 device is stable with capacitive loads, and no output capacitor is required. It has regulations for both sink and source and is very accurate. This gives DAC 5 click good flexibility for use in various applications.
Low quiescent current, wide power supply range, and per channel power down option makes DAC53608 ideal for low power, battery operated system. The device communicates through I2C interface. These devices support I2C standard mode (100 Kbps), fast mode (400 Kbps) and fast+ mode (1 Mbps). These devices also have a load DAC (LDAC) pin that allows simultaneous DAC updates. LDAC pin is tied with a mikroBUS™ PWM pin. The I2C lines (SCL and SDA) are routed to the dedicated mikroBUS™pins.
The voltage level of the logic section can be selected via VCC SEL jumper, between 3.3V and 5V. This allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. For I2C address selection, DAC 5 click has cross-shape jumper. There are four positions for I2C selection which can be selected with a SMD 0 ohms resistor. DAC 5 click has Vref SEL jumper for choosing between 2,048 V and 1,024 V, where 1,024 V is achieved using a voltage divider. Another jumper is for VrefIN and choosing between Vref (1,024 and 2,048) and VCC (3,3V and 5V). Voltage outputs from the DAC 5 Click Board™ can be connected through 9-therminal block where first is common GND and the last eight are VOUTA to VOUTH.
SPECIFICATIONS
| Type | DAC |
| Applications | Suitable for programmable power supplies, programable window comparator, VCOM biasing in display panel, laser driver in multifunction printers, auto focus digital still camera lens, ATM machines, currency counters, barcode readers, IP network cameras, projectors |
| On-board modules | DAC53608, a low power, eight channel, voltage output, 10-bit digital to analog converter (DAC) from Texas Instruments |
| Key Features | High precision MAX6106 voltage reference, low power consumption, high speed I2C interface |
| Interface | GPIO,I2C |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout on the DAC 5 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 | LDA | Output update OUT | |
| Asynchronous clear in | CLR | 2 | RST | INT | 15 | NC | |
| NC | 3 | CS | RX | 14 | NC | ||
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 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 | VCC SEL | Left | Power Supply Voltage Selection 3V3/5V, left position 3v3, right position 5v |
| JP2,JP3 | ADDR | Left | 4-position I2C address Selection toward host mcu: left - SDA; Right - SCL; Up - VCC; Down - GND |
| JP4 | Vref SELL | Left | Reference voltage (Vref) selection 2.048V/1.024V, left position 2.048V, right position 1.024V |
| JP5 | Vref IN | Left | Reference voltage input source selection (VrefIN) VCC/Vref, left position VCC, right position Vref |
| LD1 | PWR | - | Power LED indicator |