DAC Digital To Analog TLC5615 10-Bit Serial Module

Features:

• 10-Bit Resolution: Provides precise analog signal output with 1024 levels, suitable for applications requiring high accuracy.

• Serial Interface: Supports SPI or I2C communication protocols for easy interfacing with microcontrollers.

• Wide Supply Voltage Range: Operates from 2.7V to 5.5V, compatible with various power sources.

• Output Voltage Range: 0V to VDD, generating analog signals proportionate to the supply voltage.

• Low Power Consumption: Ideal for battery-powered applications.

• High Accuracy and Stability: Ensures consistent and reliable output signals over time.

• Easy to Use: Simple interface and documentation for easy integration.

Principle of Work:
The DAC TLC5615 operates by converting digital input signals into analog output signals using an internal DAC. The digital signal is processed through a serial interface (3-wire), and the corresponding analog signal is generated and output, proportional to the input signal.

Pinout of the Module:

• VCC: Power supply pin, connected to a positive voltage source.

• GND: Ground pin, connected to the circuit ground.

• REF: Reference voltage input for digital-to-analog conversion.

• CS: Chip select pin for device communication.

• DOUT: Serial data output pin.

• DIN: Serial data input pin.

• OUT: Analog output pin.

Applications:

• Data Acquisition Systems: Converts digital signals into analog for processing and display.

• Industrial Control Systems: Used for motor or temperature control by converting digital signals to analog.

• Test and Measurement Equipment: Converts digital signals for testing and analysis.

• Medical Equipment: Used in systems like patient monitors to output analog signals.

• Audio Systems: Converts digital audio signals to analog for speaker output.

Circuit:
To connect the TLC5615 to an Arduino:

• TLC5615 pin 1 (VCC) to 5V

• TLC5615 pin 2 (GND) to GND

• TLC5615 pin 3 (CS) to digital pin 10

• TLC5615 pin 4 (CLK) to digital pin 13

• TLC5615 pin 5 (DIN) to digital pin 11

• TLC5615 pin 6 (REF) to GND

• TLC5615 pin 7 (OUT) to the positive terminal of a speaker (negative to GND)

Library:
No library required.

Code:

#define CS 10
#define CLK 13
#define DIN 11

void setup() {
  pinMode(CS, OUTPUT);
  pinMode(CLK, OUTPUT);
  pinMode(DIN, OUTPUT);

  digitalWrite(CS, HIGH);
  digitalWrite(CLK, LOW);
  digitalWrite(DIN, LOW);
}

void loop() {
  for (int i = 0; i < 1024; i++) {
    int sample = 512 + (512 * sin(2 * PI * (i / 1024.0)));
    
    digitalWrite(CS, LOW);
    shiftOut(DIN, CLK, MSBFIRST, sample >> 2);
    shiftOut(DIN, CLK, MSBFIRST, sample << 6);
    digitalWrite(CS, HIGH);
  }
}

1. Upload the code to the Arduino.

2. The code generates a sine wave and outputs it to the TLC5615, which converts the digital signal to an analog signal, playable through the connected speaker.

Technical Details:

• Resolution: 10-bit

• Operating Voltage: 4.5V to 5.5V

• Output Voltage Range: 0V to VCC

• Current Output: 10mA

• Operating Temperature Range: -40°C to +85°C

• Package Type: SOIC

• Maximum Clock Frequency: 20 MHz

Resources:

• TLC5615 Datasheet

• TLC5615 Schematic Diagram

Comparisons:

• TLC5615 DAC vs. Resistor-based DAC:

  • TLC5615 DAC: Provides better precision, consistency, and ease of use. Suitable for higher resolutions and stable output over time.

  • Resistor-based DAC: Typically less precise, susceptible to temperature and voltage changes, but offers simplicity and lower cost for less demanding applications.

The TLC5615 offers numerous advantages, especially in terms of precision and ease of integration, compared to traditional resistor-based DACs.