Overview
The DAC8420FS, produced by Analog Devices Inc., is a quad 12-bit voltage-output digital-to-analog converter (DAC) with a serial digital interface. This monolithic device utilizes BiCMOS technology, offering high circuit density and low power consumption. It is available in 16-lead packages, including PDIP, SOIC, and CERDIP, making it versatile for various design needs.
The DAC8420FS features a simple and easy-to-use three-wire serial digital input that can be easily interfaced to microprocessors running at up to 10 MHz with minimal additional circuitry. Each of the four DACs can be addressed individually using a 16-bit serial word consisting of a 12-bit data word and an address header.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Resolution | 12 bits | - | - | - |
| Supply Voltage | - | +5 V | ±15 V | V |
| Reference Voltage Range | - | +2.5 V to ±10 V | - | V |
| Power Dissipation (±15 V) | - | - | 255 mW | mW |
| Power Dissipation (+5 V) | - | - | 35 mW | mW |
| Positive Supply Current (IDD) | 4 mA | - | 7 mA | mA |
| Negative Supply Current (ISS) | -3 mA | -6 mA | - | mA |
| Output Voltage Range | - | Dependent on VREFHI and VREFLO | - | V |
Key Features
- Quad 12-Bit DACs: Four independent DAC channels with 12-bit resolution.
- Serial Digital Interface: Three-wire serial interface compatible with microprocessors up to 10 MHz.
- Buffered Voltage Outputs: Fully buffered analog voltage outputs requiring no external components.
- Wide Supply Range: Operates from +5 V only to ±15 V with flexible reference voltage settings.
- Low Power Consumption: Maximum power dissipation of 255 mW at ±15 V and 35 mW at +5 V.
- User-Programmable Reset: CLR control to reset outputs to zero scale or midscale asynchronously.
- High Design Flexibility: Output voltage range set by user-defined VREFHI and VREFLO inputs.
Applications
- Software Controlled Calibration: Ideal for applications requiring precise calibration.
- Servo Controls: Used in servo control systems for precise voltage output control.
- Process Control and Automation: Suitable for industrial automation and process control systems.
- Automated Test Equipment (ATE): Used in automated testing and measurement equipment.
Q & A
- What is the resolution of the DAC8420FS?
The DAC8420FS has a resolution of 12 bits.
- What are the available package types for the DAC8420FS?
The DAC8420FS is available in 16-lead PDIP, SOIC, and CERDIP packages.
- What is the supply voltage range for the DAC8420FS?
The supply voltage range is from +5 V only to ±15 V.
- How is the output voltage range determined?
The output voltage range is determined by the user-defined VREFHI and VREFLO inputs.
- What is the maximum power dissipation of the DAC8420FS?
The maximum power dissipation is 255 mW when operating from ±15 V supplies and 35 mW when operating from a +5 V supply.
- Can the DAC8420FS be reset to a specific output level?
Yes, the CLR control allows the outputs to be reset to either zero scale or midscale asynchronously.
- What is the typical positive supply current for the DAC8420FS?
The typical positive supply current (IDD) is 4 mA.
- What is the typical negative supply current for the DAC8420FS?
The typical negative supply current (ISS) is -3 mA.
- Is the DAC8420FS compatible with high-speed microprocessors?
Yes, it is compatible with microprocessors running at up to 10 MHz.
- Do the analog voltage outputs of the DAC8420FS require external components?
No, the analog voltage outputs are fully buffered and do not require external components to achieve specified performance.
