DAC (Digital Analog Converter) is a device that converts digital signals into an analog signal (in the form of current, voltage or charge). The computer does not directly process this signal, first transform it into a digital signal that the computer can identify, and use the DAC in the sound card, which converts the sound signal into a digital signal, and is divided into two steps, ie sampling and conversion. .
1, DAC0832 digital-to-analog converter schematic / PCB source file
This design shares is based on the DAC0832 digital-to-analog converter schematic / PCB source file, which is convenient for users DIY. DAC0832 is a D / A conversion chip with an eight-bit sampling frequency. There is a two-stage input register in the integrated circuit, so that the DAC0832 chip has double buffer, single buffer, and straight through three input methods to adapt to the needs of various circuits (such as requirements). Multi-channel D / A asynchronous input, synchronous conversion, etc.).
Scenario: https://www.cirmall.com/circuit/7061
2, CNC DC power conversion and display design based on DAC0832 (Schematic + Program)
Waveform conversion and enlargement part:
Select the 31 series of microcontrollers to generate and control waveforms. The digital-to-analog converter is used by DAC0832. DAC0832 in this scenario uses a single buffer mode. As shown in Figure 5, the data ports of the P0 port and the DAC0832 are directly connected, and the ground, the DAC data register is in a straight state, ILE = 1, and the connection post P2.0. When the address (= 0) of the sheet is selected, the digital signal is written immediately to the DAC input register, and the corresponding analog voltage can be obtained through the DAC data register. The write operation ends, and immediately becomes high, and the written data is latched by the input register until the refresh is written again.
Scenario: https://www.cirmall.com/circuit/4226
3, 12-bit digital converter MCP4725 module, support I2C control DAC
12-digit digital converter MCP4725 module description:
This circuit city (www.cirmall.com) shared the schematic of the finished MCP4725 module circuit and PCB source files and DEMO firmware, etc., MCP4725 module circuit designs can be opened directly in foreign software Eagle6.9. The MCP4725 module is an I2C-controlled digital converter (DAC), and DAC can transmit an analog signal such as a sine wave from a digital source (such as an I 2 C interface on the Arduino microcontroller). Number to the analog converter is ideal for sound generation, musical instruments and many other creative projects!
12-digit digital converter MCP4725 module parameters:
12-bit resolution
I2C interface (standard, fast, high speed support)
Small Package
2.7V to 5.5V power supply
Interior EEPROM storage settings
12-digit digital converter MCP4725 module Layout description:
This version of the MCP4725 module Layout fixes some questions on the board, including the MCP4725 IC footprint, I2C pin arrangement, changing the overall board size to better adapt to your project, and some tiny adjustments. The board disconnes the pins you need to access and connects to the oscilloscope using the MCP4725 including the GND and Signal OUT pins or any other device that needs to be connected to the board. Also onboard is SCL, SDA, VCC, and another GND for your basic I 2 C pin. Also, if you want to install multiple MCP4725 on the bus, you can disable the pull-up resistor on this motherboard, more instructions, you can view the MCP4725 Module Connection Guide.
Scenario: https://www.cirmall.com/circuit/6468
4, Texas Instrument Double Channel Ultra Low Power 16 Bit 1.25 GSPS Digital Model Converter DAC3482 Evaluation Board
describe
DAC3482EVM is a circuit board that allows designers to evaluate Texas Instruments (Ti) DAC3482 dual-channel ultra low power 16-bit 1.25 GSPS digital-to-analog converter (DAC) performance circuit board, with 16-bit or 8-bit DDR LVDS data input, integrated 2X / 4X / 8X / 16X interpolation filter, 32-bit NCO and PLL, and have excellent linearity at high IF. EVM provides a flexible environment that can test DAC3482 under various clocks and data inputs and IF output conditions. For the entire IF transmitter solution, DAC34842VM includes Texas Instrument CDCE62005 clock generator / jitter canceller for DAC3482 timing. In addition to providing high quality, low jitter DAC sampling clocks to DAC3482, CDCE62005 also provides the FPGA clock as a FPGA reference clock to TSW1400EVM (or TSW3100EVM).
The EVM can be used in conjunction with TSW1400 (or TSW3100) to perform various tests and measurements. TSW1400 (or TSW3100) generates a test mode that will be fed from the 1.25 GSPS LVDS interface to DAC3482. The board CDCE62005 can be used to keep the TSW1400 (or TSW3100) panel to maintain synchronization with DAC3482EVM.
DAC3482EVM is also compatible with Xilinx and Altera's FPGA EVM and design kits for fast assessment and prototype design. DAC3482EVM includes HSMC input, directly connected to Altera FPGA EVMs compatible with HSMC. The FMC-DAC-Adapter board provided by Ti can connect DAC3482EVM to the FMC connector on the Xilinx EVM.
characteristic
Comprehensive test capability of DAC3482
Direct connection to TSW1400 / TSW3100 signal generator
Contains CDCE62005 for clock generation or jitter cancellation
Software support with full functional GUI to ensure easy testing and prototype design
Compatible with the FMC-DAC adapter card, you can connect FMC interconnect heads on Xilinx FPGA EVM
Directly compatible with HSMC connector on Altera FPGA EVM
Scenario Link: https://www.cirmall.com/circuit/48
5, Isolated 12-bit DAC - AD5324 hardware schematic + PCB
The 12-bit DAC of the aircraft level is used for the performance test of the aircraft brake control system wheel speed sensor. It uses high-speed optocoupler + low-speed optocoupler to perform Isolation of the ADC and MCU, and 4 road analog signals can be output. Provide a complete schematic and PCB layout, AD14 open.
Program link: https://www.cirmall.com/circuit/8061
6, DAC current, voltage output isolation circuit design based on ADUM347X
Industrial and Instrumentation Systems, and Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCs), often have to control output. There are two ways to control: current control (4 mA to 20 mA) and voltage control (up to ± 10 V). Typically, such design requires isolation with local system controllers to prevent ground loops while ensuring that they are not affected by external events. Traditional solutions provide power and digital isolation using discrete ICs. The cost and space of discrete solutions will become very disadvantageous when multi-channel isolation is required. The optical isolator-based solution typically has reasonable output adjustment, but additional external components are required, thus increases the board area. The power module is often bulky, and the output adjustment may not be good. The circuit shown in Figure 1 is based on the ADUM347X series isolator (ADUM3470, ADUM3473, ADUM3472, ADUM3473, ADUM3474), integrated with digital isolation, PWM-controlled power conditioning circuit, and related feedback isolation. The power is transmitted to the other end of the isolation gate using an external transformer. The 16-bit DAC AD5422 provides current and voltage output.
Scenario: https://www.cirmall.com/circuit/194
7. AD9959-four-channel DAC direct digital frequency synthesizer DDS design
This design is a 500 MSPS direct digital frequency synthesizer DDS board for four-channel DAC, which can be designed with its communication. With the following characteristics, a sweep device can be produced. File provides a schematic, Altium's PCB diagram. The code can be found in the ADI website, which provides an STC15 code example. You can reach a four-way output of up to 200MHz, each way can be different, or you can orthogonal output.
4 synchronous DDS channels (500 msps)
Rate / phase / amplitude control between channels
Delay matching of frequency / phase / amplitude change
Excellent channel interval (>65 dB)
Linear frequency / phase / amplitude scan function
Up to 16 frequency / phase / amplitude modulation (at the pin)
4 integrated 10-bit digital die converters (DAC)
Separable DAC full-scale current
Frequency tuning resolution: 0.12 Hz or more
14-bit phase offset resolution
10-bit output amplitude adjustment resolution
Dual power supply (1.8 V DDS kernel / 3.3 V serial I / O)
Scenario Link: https://www.cirmall.com/circuit/7296
8, TPA3251D2 amplifier with pcm5242 DAC can maximize sound quality
describe
This design uses a highly flexible PCM5242 differential output DAC to convert extremely high-performance analog inputs TPA3251D2 D amplifiers to digital input systems with audio processing functions. Now, the complete performance of the TPA3251D2 amplifier can be implemented by a variety of digital input sources. The simulated differential output and high SNR of the PCM5242 DAC are the perfect partners for the complete differential simulation input of the TPA3251D2 amplifier, which can achieve excellent noise performance and extremely low distortion. Audio processing and filtering can be added to the MINIDSP on the PCM5242, thereby further enhancing the audio performance in the terminal device.
characteristic
High performance and audio fidelity from TPA3251D2 using digital sources
Receive USB, optical, SPDIF, and I2S format digital input
When 10% THD + N, output 175W from the digital source
Provide less than 0.004% THD + N 10W output for 4 ohm load
MiniDSP processing flexibility using PCM5242 DAC
Noise suppression through full differential simulation channels
Scenario: https://www.cirmall.com/circuit/10723
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