Overview
The AD5687RBCPZ-RL7, produced by Analog Devices Inc., is a member of the nanoDAC+™ family. It is a low power, dual, 12-bit buffered voltage output digital-to-analog converter (DAC). This device features a 2.5 V, 2 ppm/°C internal reference and a gain select pin, allowing for full-scale output of either 2.5 V (gain = 1) or 5 V (gain = 2). The AD5687R operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design, ensuring high accuracy and reliability. The device is available in a compact 3 mm × 3 mm LFCSP package and includes a power-on reset circuit and per-channel power-down features to minimize current consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| Relative Accuracy | ±0.12 | ±2 | ±1 | LSB | |
| Differential Nonlinearity | ±1 | ±1 | ±1 | LSB | Guaranteed monotonic by design |
| Input High Voltage (VINH) | 0.7 × VLOGIC | 0.7 × VLOGIC | 0.7 × VLOGIC | V | |
| Output Low Voltage (VOL) | 0.4 | 0.4 | 0.4 | V | ISINK = 200 μA |
| Output High Voltage (VOH) | VLOGIC - 0.4 | VLOGIC - 0.4 | VLOGIC - 0.4 | V | ISOURCE = 200 μA |
| VDD | 2.7 | 5.5 | V | ||
| IDD (Normal Mode) | 0.59 | 0.7 | 0.7 | mA | VIH = VDD, VIL = GND, VDD = 2.7 V to 5.5 V |
| IDD (All Power-Down Modes) | 1 | 4 | μA | −40°C to +85°C | |
| Output Voltage Settling Time | 5 | 7 | 7 | μs | ¼ to ¾ scale settling to ±2 LSB |
| Slew Rate | 0.8 | 0.8 | 0.8 | V/μs |
Key Features
- High Accuracy and Reliability: The AD5687R features high relative accuracy (±2 LSB maximum at 12 bits) and low offset error (±1.5 mV maximum), ensuring precise output.
- Low Power Consumption: The device operates in normal mode with a current consumption of 0.59 mA to 0.7 mA and reduces to 1 μA to 4 μA in power-down mode.
- Compact Packaging: Available in a 3 mm × 3 mm LFCSP package, making it suitable for space-constrained applications.
- Flexible Gain Options: A gain select pin allows for full-scale output of either 2.5 V (gain = 1) or 5 V (gain = 2).
- Power-On Reset and Power-Down Features: The device includes a power-on reset circuit and per-channel power-down features to ensure controlled startup and minimal power consumption.
- High-Speed SPI Interface: The AD5687R uses a versatile serial peripheral interface that operates at clock rates up to 50 MHz.
Applications
- Industrial Automation: Suitable for precision control and measurement in industrial automation systems due to its high accuracy and reliability.
- Medical Devices: Used in medical equipment where precise voltage output and low power consumption are critical.
- Aerospace and Defense: The device's robust performance and compact size make it ideal for aerospace and defense applications.
- Automotive Systems: The AD5687R is available with controlled manufacturing to support the quality and reliability requirements of automotive applications.
- Consumer Electronics: Applicable in various consumer electronics requiring precise digital-to-analog conversion and low power consumption.
Q & A
- What is the resolution of the AD5687R?
The AD5687R has a resolution of 12 bits.
- What are the available package options for the AD5687R?
The AD5687R is available in a 3 mm × 3 mm LFCSP package and a 16-lead TSSOP package.
- What is the operating voltage range of the AD5687R?
The device operates from a single 2.7 V to 5.5 V supply.
- What is the maximum gain error of the AD5687R?
The gain error is less than 0.1% of the full-scale range (FSR).
- Does the AD5687R have a power-on reset feature?
Yes, the device includes a power-on reset circuit and a RSTSEL pin to ensure controlled startup.
- What is the current consumption in power-down mode?
The current consumption in power-down mode is 1 μA to 4 μA.
- What is the maximum clock rate of the SPI interface?
The SPI interface operates at clock rates up to 50 MHz.
- Is the AD5687R guaranteed monotonic by design?
Yes, the device is guaranteed monotonic by design.
- What is the slew rate of the AD5687R?
The slew rate is 0.8 V/μs.
- What are some typical applications of the AD5687R?
The device is used in industrial automation, medical devices, aerospace and defense, automotive systems, and consumer electronics.
