Serial-Input, Voltage-Output, 16-Bit DAC
The project presented here uses the MAX5541 chip, a serial-input, voltage-output, 16-bit monotonic digital-to-analog converter (DAC) that operates from a single +5Vdc supply. Notably, the DAC output is unbuffered, resulting in a low supply current of 0.3mA and a minimal offset error of 1 LSB. The DAC output range spans from 0V to VREF, providing a wide range of voltage output options.
The DAC latch is designed to accept a 16-bit serial word, allowing for precise control over the output voltage. Additionally, a power-on reset (POR) circuit is integrated, which clears the DAC output to 0V in unipolar mode when power is initially applied. This ensures a stable and predictable startup sequence.
The 10MHz 3-wire serial interface is compatible with SPI, QSPI, and MICROWIRE protocols, enabling seamless communication with a wide range of microcontrollers and other devices. Furthermore, the interface can be directly connected to optocouplers, making it suitable for applications that require isolation.
To provide a stable reference voltage, the REF3025 chip is used, which supplies a precise 2.5V reference voltage to the DAC. This ensures that the DAC output is accurate and reliable, making it suitable for a variety of applications that require high-precision voltage output.
The MAX5541 voltage-output, 16-bit digital-to-analog converter (DAC) offers 16-bit monotonicity with less than 1LSB differential linearity error. Serial-data transfer minimizes the number of package pins required. The MAX5541 is composed of two matched DAC sections, with a 12-bit inverted R-2R DAC forming the twelve LSBs and the four MSBs derived from fifteen identically matched resistors. This architecture allows the lowest glitch energy to be transferred to the DAC output on major-carry transitions. It also decreases the DAC output impedance by a factor of eight compare to a standard R-2R ladder, allowing unbuffered operation in medium-load applications.
Features
- Power Supply 5V DC
- Full 16-Bit Performance Without Adjustments
- Low Power: 1.5mW
- 1µs Settling Time
- On Bord Ref-Voltage Chip Output 2.5V (REF3025)
- Unbuffered Voltage Output Directly Drives 60kΩ Loads
- SPI/QSPI/MICROWIRE-Compatible Serial Interface
- Power-On Reset Circuit Clears DAC Output to 0V (unipolar mode)
- Schmitt Trigger Inputs for Direct Optocoupler Interface
- Header Connector for Serial Interface and output
- On Board Power LED
- PCB Dimensions: 20.85 x 15.92 mm
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The project presented here uses the MAX5541 chip, a serial-input, voltage-output, 16-bit monotonic digital-to-analog converter (DAC) that operates from a single +5Vdc supply. Notably, the DAC output is unbuffered, resulting in a low supply current of 0.3mA and a minimal offset error of 1 LSB. The DAC output range spans from 0V to VREF, providing a wide range of voltage output options.
The DAC latch is designed to accept a 16-bit serial word, allowing for precise control over the output voltage. Additionally, a power-on reset (POR) circuit is integrated, which clears the DAC output to 0V in unipolar mode when power is initially applied. This ensures a stable and predictable startup sequence.
The 10MHz 3-wire serial interface is compatible with SPI, QSPI, and MICROWIRE protocols, enabling seamless communication with a wide range of microcontrollers and other devices. Furthermore, the interface can be directly connected to optocouplers, making it suitable for applications that require isolation.
To provide a stable reference voltage, the REF3025 chip is used, which supplies a precise 2.5V reference voltage to the DAC. This ensures that the DAC output is accurate and reliable, making it suitable for a variety of applications that require high-precision voltage output.
The MAX5541 voltage-output, 16-bit digital-to-analog converter (DAC) offers 16-bit monotonicity with less than 1LSB differential linearity error. Serial-data transfer minimizes the number of package pins required. The MAX5541 is composed of two matched DAC sections, with a 12-bit inverted R-2R DAC forming the twelve LSBs and the four MSBs derived from fifteen identically matched resistors. This architecture allows the lowest glitch energy to be transferred to the DAC output on major-carry transitions. It also decreases the DAC output impedance by a factor of eight compare to a standard R-2R ladder, allowing unbuffered operation in medium-load applications.
Features
- Power Supply 5V DC
- Full 16-Bit Performance Without Adjustments
- Low Power: 1.5mW
- 1µs Settling Time
- On Bord Ref-Voltage Chip Output 2.5V (REF3025)
- Unbuffered Voltage Output Directly Drives 60kΩ Loads
- SPI/QSPI/MICROWIRE-Compatible Serial Interface
- Power-On Reset Circuit Clears DAC Output to 0V (unipolar mode)
- Schmitt Trigger Inputs for Direct Optocoupler Interface
- Header Connector for Serial Interface and output
- On Board Power LED
- PCB Dimensions: 20.85 x 15.92 mm
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