Overview
The AD5685RBCPZ-RL7, produced by Analog Devices Inc., is a member of the nanoDAC+® family. It is a quad, 14-bit, rail-to-rail, 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 AD5685R operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design, ensuring high accuracy and reliability. It is available in a 3 mm × 3 mm LFCSP package, making it suitable for space-constrained applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 14 | 14 | 14 | Bits | |
| Relative Accuracy | ±0.5 | ±1 | ±4 | LSB | |
| Differential Nonlinearity | ±1 | ±1 | ±1 | LSB | Guaranteed monotonic by design |
| Zero-Code Error | 0.4 | 1.5 | 4 | mV | |
| Output Voltage Range | 0 | 2.5 V (Gain = 1), 5 V (Gain = 2) | V | ||
| Supply Voltage | 2.7 | 5.5 | V | ||
| Settling Time | 5 | 8 | µs | ¼ to ¾ scale settling to ±2 LSB | |
| Load Regulation | 80 | µV/mA | 5 V ± 10%, DAC code = midscale; −30 mA ≤ IOUT ≤ 30 mA | ||
| Short-Circuit Current | 40 | mA | |||
| Power-Up Time | 2.5 | µs | Coming out of power-down mode; VDD = 5 V |
Key Features
- High Accuracy and Monotonicity: Guaranteed monotonic by design with less than 0.1% FSR gain error and 1.5 mV offset error performance.
- Internal Reference: Includes a 2.5 V, 2 ppm/°C internal reference.
- Gain Selectability: Gain select pin allows for full-scale output of either 2.5 V (gain = 1) or 5 V (gain = 2).
- Low Power Consumption: Operates from a single 2.7 V to 5.5 V supply and features a power-down mode reducing current consumption to 4 µA at 3 V.
- Versatile Interface: SPI interface operates at clock rates up to 50 MHz with a VLOGIC pin for 1.8V/3V/5V logic compatibility.
- Compact Packaging: Available in a 3 mm × 3 mm LFCSP and a TSSOP package.
- Power-On Reset and RSTSEL 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 precision measurement applications.
- Medical Devices: Used in medical equipment requiring high accuracy and reliability.
- Aerospace and Defense: Ideal for applications requiring robust and precise voltage output.
- Automotive Systems: Applicable in automotive control systems and sensor calibration.
- Test and Measurement Equipment: Utilized in various test and measurement instruments for precise voltage generation.
Q & A
- What is the resolution of the AD5685RBCPZ-RL7?
The AD5685RBCPZ-RL7 has a resolution of 14 bits.
- What is the operating voltage range of the AD5685RBCPZ-RL7?
The device operates from a single 2.7 V to 5.5 V supply.
- What is the settling time of the AD5685RBCPZ-RL7?
The settling time is typically 8 µs for ¼ to ¾ scale settling to ±2 LSB.
- Does the AD5685RBCPZ-RL7 have an internal reference?
Yes, it includes a 2.5 V, 2 ppm/°C internal reference.
- What are the available package options for the AD5685RBCPZ-RL7?
The device is available in a 3 mm × 3 mm LFCSP and a TSSOP package.
- How does the gain select feature work on the AD5685RBCPZ-RL7?
The gain select pin allows for full-scale output of either 2.5 V (gain = 1) or 5 V (gain = 2).
- What is the power consumption in power-down mode?
The current consumption is reduced to 4 µA at 3 V in power-down mode.
- What is the maximum clock rate of the SPI interface?
The SPI interface operates at clock rates up to 50 MHz.
- Is the AD5685RBCPZ-RL7 guaranteed monotonic?
Yes, the device is guaranteed monotonic by design.
- What is the typical load regulation of the AD5685RBCPZ-RL7?
The load regulation is typically 80 µV/mA.
