Overview
The AD5684RBCPZ-RL7, produced by Analog Devices Inc., is a member of the nanoDAC+™ family. It is a low power, quad, 12-bit buffered voltage output Digital-to-Analog Converter (DAC). This device is designed to operate from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5684R features a 2.5 V, 2 ppm/°C internal reference and a gain select pin, allowing for full-scale output of 2.5 V (gain=1) or 5 V (gain=2).
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 12-bit | ||||
| Supply Voltage | 2.7 | 5.5 | V | ||
| Internal Reference Voltage | 2.5 | V | 2 ppm/°C | ||
| Output Voltage Range (Gain=1) | 0 | 2.5 | V | VREF = 2.5 V | |
| Output Voltage Range (Gain=2) | 0 | 5 | V | VREF = 2.5 V | |
| Load Regulation | 80 | µV/mA | DAC code = midscale; −20 mA ≤ IOUT ≤ +20 mA | ||
| Short-Circuit Current | 40 | mA | |||
| Power Consumption (Normal Mode) | 0.59 | 0.7 | mA | VDD = 2.7 V to 5.5 V, all DACs active, unloaded | |
| Power Consumption (Power-Down Mode) | 4 | µA | VDD = 3 V, all DACs powered down | ||
| Output Settling Time | 5 | 7 | µs | ¼ to ¾ scale settling to ±2 LSB | |
| SPI Clock Rate | 50 | MHz | |||
Key Features
- Low Power Consumption: The AD5684R operates in normal mode with a current consumption of 0.59 mA to 0.7 mA and reduces to 4 µA in power-down mode at 3 V.
- High Accuracy: The device features high relative accuracy with a maximum INL of ±1 LSB and includes a 2.5 V, 2 ppm/°C internal reference.
- Gain Selectability: A gain select pin allows for full-scale output of 2.5 V (gain=1) or 5 V (gain=2).
- Per-Channel Power-Down: Each channel can be powered down independently, reducing current consumption to 4 µA at 3 V.
- Versatile SPI Interface: The device employs a SPI interface that operates at clock rates up to 50 MHz and includes a VLOGIC pin for 1.8 V/3 V/5 V logic compatibility.
- Power-On Reset and Reset Select Pin: Ensures DAC outputs power up to zero-scale or midscale and remain there until a valid write takes place).
Applications
- Industrial Automation: Suitable for control systems and process control where precise voltage output is required.
- Medical Devices: Can be used in medical equipment that demands high accuracy and low power consumption.
- Aerospace and Defense: Applicable in systems requiring reliable and precise analog output.
- Automotive Systems: Used in automotive control systems for precise voltage control.
- Test and Measurement Equipment: Ideal for instruments that require accurate and stable voltage outputs.
Q & A
- What is the resolution of the AD5684R DAC?
The AD5684R is a 12-bit DAC.
- What is the operating voltage range of the AD5684R?
The device operates from a single 2.7 V to 5.5 V supply.
- What is the accuracy of the internal reference voltage?
The internal reference voltage has an accuracy of 2.5 V with a drift of 2 ppm/°C.
- Can the AD5684R be powered down individually per channel?
Yes, each channel can be powered down independently, reducing current consumption to 4 µA at 3 V.
- What is the maximum SPI clock rate for the AD5684R?
The SPI interface operates at clock rates up to 50 MHz.
- How does the power-on reset feature work on the AD5684R?
The power-on reset circuit and the RSTSEL pin ensure that the DAC outputs power up to zero-scale or midscale and remain there until a valid write takes place.
- What is the load regulation of the AD5684R?
The load regulation is 80 µV/mA for DAC code at midscale and output current between −20 mA and +20 mA.
- What is the short-circuit current of the AD5684R?
The short-circuit current is 40 mA.
- What are the typical applications of the AD5684R?
The AD5684R is suitable for industrial automation, medical devices, aerospace and defense, automotive systems, and test and measurement equipment.
- What are the available package options for the AD5684R?
The device is available in 16-Lead TSSOP and 16-Lead LFCSP (3mm x 3mm w/ EP) packages.
