You use the dac7801ku device when you want exact control in digital-to-analog converter projects. This dac has two 12-bit resolutions, 16 channels, and a buffered output for steady signals. You get important things like asynchronous CLEAR and a single +5V supply. The fast interface lets you process things quickly, which helps with digital signal processing jobs. These things make the dac a good pick for many uses where you need accurate signal changes. You can trust its specifications for steady performance.
Key Takeaways
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The DAC7801KU is a dual 12-bit digital-to-analog converter. It gives very accurate control for many projects.
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It has a fast parallel interface. This lets it move data quickly and update in real time. This makes it great for audio and measurement uses.
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The device works with just one +5V supply. This makes building circuits easier and saves space.
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It can work in temperatures from -40°C to +85°C. So, the DAC7801KU can be used inside or outside.
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The asynchronous CLEAR function lets you reset it fast. This helps your system get ready for new jobs quickly.
DAC7801KU Device Overview
What Is It?
The dac7801ku device helps you control signals very well. It is a digital-to-analog converter made by Texas Instruments. Texas Instruments is a well-known electronics company. This device is part of the DAC7800/01/02 family. It uses a steady CMOS process to work. The dac7801ku has two 12-bit channels. You can turn digital signals into two analog outputs at once. The parallel interface lets you change both outputs fast. This is good for real-time control.
Here is a quick look at the background and main attributes:
| Feature | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Type | Dual 12-bit digital-to-analog converter |
| Family | DAC7800/01/02 family |
| Process | Built using a reliable CMOS process |
| Interface | Parallel interface for simultaneous output updates |
| Temperature Range | Maintains accuracy across a wide temperature range |
| Applications | Suitable for control systems, instrumentation, and signal conversion needs |
Key Features
The dac7801ku device has many helpful features. These features help you get steady and correct results in your projects.
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Fast digital interface lets you move data quickly
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Low crosstalk keeps channels from mixing signals
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Tested to work in hot and cold temperatures
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Uses only one +5V supply, which is simple
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Clear control helps you reset or calibrate fast
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Different packaging choices fit your needs
You can see more technical features in the table below:
| Product Attribute | Attribute Value |
|---|---|
| Manufacturer | Texas Instruments |
| Voltage - Supply, Digital | 5V |
| Voltage - Supply, Analog | 5V |
| Supplier Device Package | 24-SOIC |
| Settling Time | 800ns |
| Operating Temperature | -40°C ~ 85°C |
| Number of D/A Converters | 2 |
| Number of Bits | 12 |
| Data Interface | Parallel |
| Architecture | Multiplying DAC |
The asynchronous CLEAR function lets you reset outputs or do calibration any time. This is helpful when you start up or need to make changes.
The dac7801ku device uses a smart design to handle digital inputs. It makes two separate analog outputs. Each channel has its own input register and conversion block. The R-2R ladder in each channel gives you accurate analog signals. Control logic helps with chip select, write, and clear signals. Both channels use the same ground and power supply. This makes your circuit easier.
Use Cases
You can use the dac7801ku device in many ways. It works in control systems, measurement tools, and signal conversion projects. You might use it to make exact voltages for sensors. It can also control actuators in automation systems. The device is good for audio processing and instrumentation. It gives you steady and correct analog signals.
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Control systems for factory automation
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Measurement and test equipment
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Signal conditioning and conversion
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Audio signal making and processing
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Instrumentation that needs steady analog outputs
You get steady performance and many uses. This makes the dac7801ku a good pick for your next project.
Pinout and Package
Pin Configuration
When you work with the DAC7801KU device, you need to know the pin configuration. This device comes with 24 pins. Each pin has a special job. You connect these pins to your circuit to make the DAC work right. Here is a simple list of important pins and what they do:
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VDD: This pin gives power to the device.
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GND: This pin connects to ground.
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DB0–DB11: These pins carry your digital data. You use them to send 12-bit values.
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WR: This pin lets you write data into the DAC.
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CS: This pin selects the chip when you want to use it.
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CLR: This pin clears or resets the outputs.
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VOUTA, VOUTB: These pins give you the analog output signals.
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REF: This pin sets the reference voltage for the DAC.
You can find the full pinout in the datasheet, but this list helps you get started. Always double-check your connections. If you connect the wrong pin, the device may not work.
Tip: Label each wire when you build your circuit. This helps you avoid mistakes and makes troubleshooting easier.
Package Type
You get the DAC7801KU device in a 24-lead SOIC (Small Outline Integrated Circuit) package. This package type helps you save space on your circuit board. You can use surface-mount technology (SMT) to attach the device. SMT makes your assembly process faster and more reliable.
The package type affects how you place and connect the DAC in your design. It gives you strong mechanical support and good electrical connections. It also helps manage heat, so your device stays cool and works well.
Here is a table that shows how the package type helps your circuit:
| Characteristic | Description |
|---|---|
| Terminal Position | Makes sure you connect each pin to the right spot for proper function. |
| Mounting Type | Lets you use surface-mount technology for easy and secure placement on your circuit board. |
| Package Type | Gives you support, good electrical paths, and helps with heat so your DAC works reliably. |
When you choose the DAC7801KU, you get a device that fits well into modern circuit boards. You can build compact and efficient systems with this package.
Specifications
Resolution and Accuracy
The dac7801ku device gives you very exact results. Each channel has 12-bit resolution. This means each channel can make 4096 output levels. The buffered output keeps your analog signals steady. This stops the signal from dropping. You can control two signals at once because there are two channels. These features help you get the right voltage every time. This is good for measurement tools, audio work, and signal changes.
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Number of Channels | 2 |
| Output Type | Buffered Voltage |
| Output Levels | 4096 per channel |
| Asynchronous CLEAR | Yes |
Note: The asynchronous CLEAR lets you reset outputs fast. This keeps your system ready for calibration any time.
Voltage and Power
You only need one +5V supply to power the dac7801ku device. This makes your circuit simple to build. You do not need extra voltage sources. This saves space and money. The dac uses this one supply for both digital and analog parts. This helps stop power problems and keeps your system working well.
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One +5V supply powers both analog and digital parts
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Makes your power design easier
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You do not need many voltage sources
The dac7801ku device uses power in a smart way. You can use it in many places without worrying about high power use. This is important for battery-powered or portable systems.
Interface and Speed
You connect to the dac7801ku device with a parallel interface. This lets you send data to the dac very fast. You can update both channels quickly. This is important for real-time jobs. Fast interfaces help you move data fast and cut down delays. Your system can handle new data right away. This gives you better performance for hard tasks.
The dac also has asynchronous CLEAR and chip select. These features give you more control over your signals. They help you manage timing in your system.
| Feature | Benefit |
|---|---|
| Parallel Interface | Fast data transfer |
| Asynchronous CLEAR | Quick reset and calibration |
| Chip Select | Easy channel management |
| Settling Time | 800ns for fast output stabilization |
Tip: Use the fast interface for best results in systems that need quick updates, like audio or test equipment.
Environmental Ratings
You can use the dac7801ku device in many places. It works from -40°C to +85°C. This wide range means it works in hot or cold spots. The device keeps working well even if the temperature changes. You do not have to worry about losing accuracy.
| Environmental Specification | Value |
|---|---|
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
| Humidity Resistance | High |
The dac7801ku device meets tough rules for reliability. You can use it in factories, labs, or outside. Its features and specs make it a good pick for many jobs.
Operation
How It Works
You use the DAC7801KU device to turn digital values into real-world voltages. When you send a digital code to the DAC, it starts processing the data right away. Each channel has its own input register. The device stores your digital value in this register. After that, the DAC uses an R-2R ladder network to convert the digital code into an analog voltage. The buffered output makes sure your signal stays steady and does not drop. This is important when you need accurate voltages for sensors or actuators.
The asynchronous CLEAR pin gives you control over the outputs. If you need to reset the outputs quickly, you can use this pin. The device will set the outputs to zero or a known state. This helps you keep your system safe and ready for new processing tasks.
Tip: Always check your reference voltage. The DAC uses this voltage to set the highest output level. A stable reference gives you better results.
Data Input Methods
You connect to the DAC7801KU using a parallel interface. This means you send all 12 bits of your data at once. You use the DB0 to DB11 pins for this job. The WR (write) pin tells the device when to store your data. The CS (chip select) pin lets you choose which DAC you want to use if you have more than one in your system.
Here is a simple step-by-step process for data input:
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Set your digital value on the DB0–DB11 pins.
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Make sure the CS pin is active.
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Pulse the WR pin to store the value.
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The DAC starts processing and updates the output.
This fast method helps you in digital signal processing and other real-time applications. You get quick updates, which is great for audio, measurement, or control systems. The parallel interface makes processing easy and reliable.
| Signal Pin | Function |
|---|---|
| DB0–DB11 | Digital data input |
| WR | Write control |
| CS | Chip select |
| CLR | Asynchronous clear |
You can use these methods to get the most out of your DAC7801KU device. Fast and steady processing helps you build better systems.
Applications
You can use the DAC7801KU device in lots of digital projects. This dac helps you get good results in many areas. Here are some common ways people use it and why it helps.
Audio Processing
You want your audio projects to sound clear. The DAC7801KU changes digital signals into clean sounds. This makes music or voices sound better. It has two 12-bit channels for exact output. You can use this dac when you need accurate digital-to-analog conversion. In digital signal processing, this device keeps the sound true and stops noise.
Tip: Try the DAC7801KU in your audio system. It can make every note clearer and more detailed.
Signal Conditioning
Signal conditioning is needed in many projects. You must keep signals strong and clear. The DAC7801KU helps with signal conditioning in control and measurement systems. It gives steady and correct outputs. This makes your equipment work better.
| Benefit Description | Explanation |
|---|---|
| Precise Output Generation | Makes sure analog outputs are right, so measurements are reliable. |
| Low Crosstalk | Stops channels from mixing, so signals stay clear. |
| Dual-Channel Capabilities | Lets you handle more than one signal at once, which helps control systems. |
You can use this dac in automation systems. It helps machines move smoothly. You also get good results in sensitive measuring tools. The device keeps outputs steady for monitors. In process control, it helps devices react the right way. You can even make circuits that change signal strength easily.
Measurement Equipment
Measurement tools need steady and exact signals. The DAC7801KU works well in this area. You can use it in test systems, lab tools, and monitors. The dac gives you the accuracy needed for digital projects. Your tools will show the right results every time. This makes your work easier and more trustworthy.
Note: Using the DAC7801KU in measurement tools helps your system stay correct, even if things change.
Pros and Cons
Advantages
There are lots of good things about using the DAC7801KU device. You can control two signals at once because it has two 12-bit channels. You only need one +5V supply, so building your circuit is easy. The parallel interface lets you send data fast. This helps when you need quick updates in digital signal processing. The buffered output keeps your signals strong and steady. You do not have to worry about weak signals or noise.
The asynchronous CLEAR feature lets you reset outputs right away. This is helpful if you want to start over or calibrate your system. The device works well in hot or cold places. You can use it in many different environments. Low crosstalk means your channels do not mix signals. This keeps your outputs clean and correct.
Some main advantages are:
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You get two 12-bit channels for better control
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The parallel interface gives you fast data updates
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You only need one supply, so it is simple
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Buffered outputs keep signals steady
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Asynchronous CLEAR lets you reset easily
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It works in many temperatures
Tip: Pick the DAC7801KU if you want fast and steady analog outputs in your project.
Limitations
There are some things you should know about the limits of the DAC7801KU device. The parallel interface needs lots of pins. You might need a bigger microcontroller or more space on your board. It does not have serial communication. Some new systems use serial to save space.
The resolution is 12 bits. If you need more accuracy, you may want a DAC with more bits. The device only has two channels. If you need more outputs, you might need extra DACs. The DAC7801KU uses a +5V supply. If your system uses lower voltage, you may need a different device.
Here is a table that shows the main limits:
| Limitation | Description |
|---|---|
| Needs lots of pins | Parallel interface uses more board space |
| No serial interface | Cannot use SPI or I2C for data transfer |
| 12-bit resolution | Not enough for very high-precision applications |
| Only two channels | May need more DACs for bigger projects |
| Fixed +5V supply | Not ideal for low-voltage systems |
Note: Always think about what your project needs before you choose a DAC. Picking the right one can save you time and problems.
Alternatives
DAC7800 and DAC7802
You might want to know how the DAC7801KU compares to other models in the same family. The DAC7800 and DAC7802 are close relatives. Each one has its own strengths. The DAC7800 gives you a single 12-bit channel. This model works well if you only need one output. The DAC7802 offers two 8-bit channels. You can use it when you want to control two signals, but you do not need as much detail as a 12-bit dac.
Here is a table to help you see the main differences:
| Model | Channels | Resolution | Output Type | Best Use Case |
|---|---|---|---|---|
| DAC7800 | 1 | 12-bit | Buffered Voltage | Simple, single-output tasks |
| DAC7801KU | 2 | 12-bit | Buffered Voltage | Dual, high-precision control |
| DAC7802 | 2 | 8-bit | Buffered Voltage | Dual, basic signal control |
If you need two high-precision outputs, the DAC7801KU is the best choice in this family.
Comparison
When you choose a dac, you should think about your project needs. The DAC7801KU stands out if you want two channels with high accuracy. The DAC7800 is good for simple jobs with one output. The DAC7802 is better for projects that do not need as much detail.
You can also find other digital-to-analog converters on the market. Some popular options include:
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PROZOR DAC Converter: Works with Bluetooth 5.0 and many devices. It gives you great sound quality and supports a high sampling rate.
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RME's ADI2: Known for both analog-to-digital and digital-to-analog conversion. It is a favorite for audio professionals.
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Apogee's Mini-DAC: Offers strong mid-range performance.
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Benchmark DAC1: Delivers high-quality audio for demanding users.
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Lavry DA10 Black: Famous for excellent audio quality.
For those who want the best sound, high-end dacs like Lavry Gold DA924, Prism DA2, and Weiss DAC1 Mk2 are available. These models cost much more and target audiophiles or professional studios.
Tip: Always match the dac to your project. Think about how many channels you need and how much detail you want in your output.
You can count on the DAC7801KU device to work well. It has two 12-bit channels, a strong CMOS design, and a quick parallel interface. You can use this DAC for many things. Some examples are:
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Industrial control systems
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Precision measurement equipment
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Robotics and motion control
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Audio and video processing
The table below helps you know when to pick the DAC7801KU instead of other converters:
| Feature | Benefit |
|---|---|
| Dual Channels | Two 12-bit outputs |
| Low Crosstalk | Clean, accurate signals |
| Wide Temperature | Works in many environments |
| Simple Power | Easy to use |
If you want more information, look at the official datasheet.
Written by Jack Elliott from AIChipLink.
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