Overview
The AD5643RBRMZ-3REEL7, produced by Analog Devices Inc., is a member of the nanoDAC® family. It is a low-power, dual 14-bit buffered voltage-out digital-to-analog converter (DAC) designed for high precision and reliability. This device operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5643R features an on-chip reference with a 1.25 V, 5 ppm/°C option, providing a full-scale output of 2.5 V. The on-chip reference is off at power-up, allowing the use of an external reference if needed.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions/Comments |
|---|---|---|---|---|---|
| Number of Channels | 2 | ||||
| DAC Type | Voltage Out | ||||
| Resolution | 14 bits | ||||
| Operating Temperature Range | -40 | 105 | °C | ||
| Supply Voltage | 2.7 | 3.6 | 5.5 | V | |
| Reference Voltage | 1.25 | V | 5 ppm/°C | ||
| Full-Scale Output | 2.5 | V | |||
| Output Voltage Settling Time | 3.5 | 5 | µs | ¼ to ¾ scale settling to ±0.5 LSB | |
| Interface | Serial, SPI | ||||
| Power Consumption (Typ) | 3.24m | W | |||
| Power-Down Current | 0.2 | 1 | µA | VDD = 2.7 V to 3.6 V |
Key Features
- Low Power Consumption: The AD5643R is designed for low power consumption, making it suitable for battery-operated equipment.
- On-Chip Reference: The device features an on-chip reference with 5 ppm/°C temperature coefficient, which can be turned on by writing to the DAC.
- Monotonic by Design: Guaranteed monotonicity ensures that the output voltage always increases with increasing digital code.
- Power-On Reset and Power-Down Mode: The device includes a power-on reset circuit and a power-down feature that reduces current consumption to 480 nA at 5 V.
- Versatile Interface: The AD5643R uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating at clock rates up to 50 MHz.
- Precision Output Amplifier: The on-chip precision output amplifier enables rail-to-rail output swing.
Applications
- Portable and Battery-Operated Equipment: The low power consumption makes it ideal for use in portable devices.
- Industrial Control Systems: Suitable for applications requiring high precision and reliability in industrial environments.
- Medical Devices: Can be used in medical equipment where precise voltage output is critical.
- Aerospace and Defense: Applicable in systems requiring high reliability and precision under various environmental conditions.
Q & A
- What is the resolution of the AD5643R?
The AD5643R has a resolution of 14 bits.
- What is the operating temperature range of the AD5643R?
The operating temperature range is from -40°C to 105°C.
- What is the supply voltage range for the AD5643R?
The supply voltage range is from 2.7 V to 5.5 V.
- Does the AD5643R have an on-chip reference?
Yes, the AD5643R features an on-chip reference with a 1.25 V, 5 ppm/°C option.
- What is the full-scale output voltage of the AD5643R-3 model?
The full-scale output voltage is 2.5 V for the AD5643R-3 model.
- How does the power-down feature work?
The power-down feature reduces the current consumption to 480 nA at 5 V, and it provides software-selectable output loads while in power-down mode.
- What type of interface does the AD5643R use?
The AD5643R uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- What is the typical power consumption of the AD5643R?
The typical power consumption is 3.24 mW.
- Is the AD5643R RoHS compliant?
Yes, the AD5643R is RoHS compliant.
- What is the output voltage settling time for the AD5643R?
The output voltage settling time is typically 5 µs for ¼ to ¾ scale settling to ±0.5 LSB.
