Overview
The AD5666ARUZ-2 from Analog Devices Inc. is a low power, quad, 16-bit, buffered voltage-output Digital-to-Analog Converter (DAC). This device operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. It features an on-chip reference with an internal gain of 2, available in two versions: the AD5666-1 with a 1.25 V 5 ppm/°C reference and the AD5666-2 with a 2.5 V 5 ppm/°C reference, providing full-scale outputs of 2.5 V and 5 V respectively. The device includes a power-on reset circuit and a power-down feature that significantly reduces current consumption to 400 nA at 5 V. It also supports a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
Key Specifications
| Parameter | Value | Unit | Conditions/Comments |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | ||
| Product Category | Multichannel Voltage Output D/A Converters | ||
| Package | 14-lead TSSOP | ||
| Supply Voltage | 2.7 V to 5.5 V | V | |
| Resolution | 16-bit | ||
| Reference Voltage | 1.25 V or 2.5 V, 5 ppm/°C | V | Internal reference |
| Full-Scale Output | 2.5 V or 5 V | V | Depending on reference voltage |
| Power Consumption (Normal Mode) | 0.65 mA to 0.85 mA | mA | VDD = 2.7 V to 3.6 V |
| Power Consumption (Power-Down Mode) | 200 nA at 3 V, 400 nA at 5 V | nA | |
| Interface | 3-wire serial interface, up to 50 MHz | Compatible with SPI, QSPI, MICROWIRE, DSP | |
| Temperature Range | -40°C to 105°C | °C | |
| RoHS Compliance | Yes |
Key Features
- Quad, 16-bit DAC with on-chip 1.25 V or 2.5 V, 5 ppm/°C reference.
- Operates from a single 2.7 V to 5.5 V supply.
- Guaranteed monotonic by design.
- Selectable power-on reset to 0 V or midscale.
- Power-down capability with low current consumption (200 nA at 3 V, 400 nA at 5 V).
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating up to 50 MHz.
- On-chip precision output amplifier enabling rail-to-rail output swing.
- Asynchronous CLR function to clear all DACs to 0 V, midscale, or full scale.
- LDAC function for simultaneous update of all DAC outputs.
Applications
- Process control systems.
- Data acquisition systems.
- Portable battery-powered instruments.
- Digital gain and offset adjustment.
- Programmable voltage and current sources.
- Programmable attenuators.
Q & A
- What is the resolution of the AD5666ARUZ-2 DAC?
The AD5666ARUZ-2 has a 16-bit resolution.
- What are the available reference voltages for the AD5666ARUZ-2?
The AD5666ARUZ-2 has on-chip references of 1.25 V and 2.5 V, both with a 5 ppm/°C temperature coefficient.
- What is the power consumption of the AD5666ARUZ-2 in normal mode?
The power consumption in normal mode is typically between 0.65 mA and 0.85 mA at VDD = 2.7 V to 3.6 V.
- How much current does the AD5666ARUZ-2 consume in power-down mode?
In power-down mode, the device consumes 200 nA at 3 V and 400 nA at 5 V.
- What type of interface does the AD5666ARUZ-2 use?
The AD5666ARUZ-2 uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating up to 50 MHz.
- What is the temperature range of the AD5666ARUZ-2?
The operating temperature range is -40°C to 105°C.
- Is the AD5666ARUZ-2 RoHS compliant?
Yes, the AD5666ARUZ-2 is RoHS compliant.
- What is the package type of the AD5666ARUZ-2?
The AD5666ARUZ-2 is available in a 14-lead TSSOP package.
- What are some common applications of the AD5666ARUZ-2?
Common applications include process control, data acquisition systems, portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
- How does the power-on reset function work on the AD5666ARUZ-2?
The power-on reset circuit ensures that the DAC output powers up to either 0 V or midscale, depending on the POR pin setting, and remains at this level until a valid write takes place.
