The part number DAC121C081CIMK/NOPB refers to a Digital-to-Analog Converter (DAC) manufactured by Texas Instruments (TI). It is a 12-bit, single-channel DAC, part of the DAC121C08 series. The "NOPB" suffix typically indicates the part is lead-free, and "CIMK" refers to a specific package type and form factor.
Package Type and Pin Functionality
This specific part comes in a VSSOP (Very Small Shrink Outline Package) form factor, often featuring a 10-pin configuration. Below is the detailed explanation of the DAC121C081CIMK/NOPB pin functions.
Pin Function Specification for DAC121C081CIMK/NOPB
Pin Number Pin Name Pin Function Description 1 VSS Ground pin. Connect to the system ground to complete the circuit's return path. 2 VDD Supply voltage pin. Provide a positive supply voltage (typically 3.3V or 5V depending on the application) to power the DAC. 3 OUT DAC output. The output voltage is generated based on the input digital value, corresponding to the input code from the digital interface . 4 SCL Serial Clock Input. A clock signal for synchronizing data transmission between the DAC and the microcontroller or controller. 5 SDA Serial Data Input/Output. The data line for transmitting and receiving digital data between the DAC and the microcontroller. 6 CS Chip Select. Active low signal that enables the DAC. When pulled low, it activates the DAC to listen for input signals. 7 LDAC Load DAC Input. When activated, it latches the DAC input code into the DAC register, which affects the output voltage. 8 VOUT Voltage Output. Same as the OUT pin, it provides the analog output after conversion from the digital input. 9 A0 Address Select. A logic level used for selecting the address of the DAC when using a system that supports multiple devices. 10 A1 Address Select. A second address select for configurations involving multiple DACs in a chain.Circuit Principle Instructions
The DAC121C081CIMK/NOPB functions as a digital-to-analog converter using the I2C interface (SCL, SDA) for data transmission. The microcontroller sends the digital code to the DAC, and upon receiving the clock signal (SCL), the DAC processes the input code and outputs a corresponding analog voltage via the OUT/VOUT pin. The LDAC pin is used to latch the input code into the DAC, and the CS pin ensures the DAC only operates when enabled.
Basic Operation: The microcontroller sends the digital input code to the DAC through the SDA line, synchronized with the SCL clock signal. The DAC processes the code and outputs an analog signal proportional to the input digital value. The LDAC pin can be used to load the input code to the DAC, while CS enables the DAC to respond to commands.20 Common FAQ Questions and Answers
Q: What is the DAC121C081CIMK/NOPB used for? A: The DAC121C081CIMK/NOPB is used for converting digital signals into corresponding analog voltages in applications requiring precise analog output from a digital input. Q: What is the operating voltage range for DAC121C081CIMK/NOPB? A: The DAC121C081CIMK/NOPB operates within a supply voltage range of 2.7V to 5.5V. Q: How many bits of resolution does the DAC121C081CIMK/NOPB provide? A: The DAC121C081CIMK/NOPB provides 12-bit resolution. Q: How is the output voltage from the DAC121C081CIMK/NOPB determined? A: The output voltage is determined by the digital input code sent to the DAC, with a corresponding analog voltage output. Q: What is the typical current consumption of the DAC121C081CIMK/NOPB? A: The typical current consumption is around 2mA during operation. Q: Can the DAC121C081CIMK/NOPB be used with a 3.3V supply? A: Yes, it is fully compatible with a 3.3V supply voltage. Q: What communication protocol does the DAC121C081CIMK/NOPB use? A: It uses the I2C communication protocol for data transmission. Q: How does the DAC121C081CIMK/NOPB interface with a microcontroller? A: The DAC121C081CIMK/NOPB interfaces with a microcontroller using the SDA (data) and SCL (clock) lines for communication, and CS to enable the DAC. Q: What does the LDAC pin do? A: The LDAC pin latches the digital input code into the DAC, triggering an output change.Q: Can I use the DAC121C081CIMK/NOPB with multiple devices?
A: Yes, you can interface multiple DAC121C081CIMK/NOPB devices on the same I2C bus using different address configurations.Q: How many pins does the DAC121C081CIMK/NOPB have?
A: The DAC121C081CIMK/NOPB has 10 pins.Q: What are the main components of the DAC121C081CIMK/NOPB circuit?
A: The main components include the I2C interface, DAC core, and output stage for converting the digital signal to analog.Q: Is the DAC121C081CIMK/NOPB lead-free?
A: Yes, the NOPB suffix indicates it is a lead-free component.Q: How do I reset the DAC121C081CIMK/NOPB?
A: A reset can be performed by pulling the CS pin low and then high, which resets the DAC.Q: What is the output impedance of the DAC121C081CIMK/NOPB?
A: The DAC output impedance is typically 10Ω, but it varies depending on load conditions.Q: What is the output voltage range for DAC121C081CIMK/NOPB?
A: The output voltage range depends on the supply voltage and typically can range from 0V to VDD.Q: How fast can the DAC121C081CIMK/NOPB operate?
A: The maximum data rate is 400kHz for I2C communication.Q: What is the DAC121C081CIMK/NOPB's output noise level?
A: The DAC output typically has a noise level of about 10mV peak-to-peak.Q: Can the DAC121C081CIMK/NOPB be used in battery-operated devices?
A: Yes, the low power consumption makes it ideal for battery-operated systems.Q: How do I interface the DAC121C081CIMK/NOPB with a microcontroller using I2C?
A: Use the I2C SDA and SCL lines to send the 12-bit data to the DAC, ensuring that the CS line is pulled low for the DAC to receive the data.This explanation provides a comprehensive look at the DAC121C081CIMK/NOPB, its functions, pin-out details, and common questions.