Overview
The AD5676BCPZ-REEL7 is a low power, octal, 16-bit buffered voltage output digital-to-analog converter (DAC) produced by Analog Devices Inc. This device is part of the AD5676 series and is available in a 20-lead LFCSP package. It operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. The AD5676 features a gain select pin, allowing for full-scale output of either VREF (gain = 1) or 2 × VREF (gain = 2). The internal power-on reset circuit and the RSTSEL pin ensure that the output DACs power up to zero scale or midscale and remain there until a valid write takes place.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 16-bit | |
| Supply Voltage | 2.7 V to 5.5 V | |
| Output Voltage Range | 0 V to VREF (Gain = 1), 0 V to 2 × VREF (Gain = 2) | |
| Output Current Drive (IOUT) | 15 mA | |
| Capacitive Load Stability | 2 nF (RL = ∞), 10 nF (RL = 1 kΩ) | |
| Load Regulation | 183 µV/mA | VDD = 5 V, DAC code = midscale |
| Gain Error | ±0.18% of FSR (Gain = 1), ±0.25% of FSR (Gain = 2) | |
| Offset Error Drift | ±1 µV/°C | |
| DC Power Supply Rejection Ratio (PSRR) | 0.25 mV/V | DAC code = midscale, VDD = 5 V ± 10% |
| Interface Clock Rate | Up to 50 MHz |
Key Features
- Gain Select Pin: Allows for full-scale output of either VREF (gain = 1) or 2 × VREF (gain = 2).
- Internal Power-On Reset: Ensures output DACs power up to zero scale or midscale and remain there until a valid write takes place.
- Per Channel Power-Down Mode: Reduces current consumption to 1 µA per channel.
- Serial Peripheral Interface (SPI): Operates at clock rates up to 50 MHz.
- Logic Compatibility: 1.8 V logic compatibility with VLOGIC pin supporting 1.62 V to 5.5 V.
- Package Options: Available in 20-lead TSSOP and LFCSP packages.
Applications
- Optical Transceivers: Suitable for precision voltage output in optical communication systems.
- Base Station Power Amplifiers: Used for precise voltage control in power amplifiers.
- Process Control (PLC Input/Output Cards): Ideal for industrial control systems requiring precise analog outputs.
- Industrial Automation: Used in various automation applications requiring accurate voltage outputs.
- Data Acquisition Systems: Suitable for systems that require high precision analog output.
Q & A
- What is the resolution of the AD5676 DAC?
The AD5676 DAC has a resolution of 16 bits.
- What is the operating voltage range of the AD5676?
The AD5676 operates from a single 2.7 V to 5.5 V supply.
- What are the output voltage ranges for the AD5676?
The output voltage ranges are 0 V to VREF (Gain = 1) and 0 V to 2 × VREF (Gain = 2).
- What is the maximum output current drive of the AD5676?
The maximum output current drive is 15 mA.
- How does the gain select pin function on the AD5676?
The gain select pin allows for full-scale output of either VREF (gain = 1) or 2 × VREF (gain = 2).
- What is the purpose of the internal power-on reset circuit in the AD5676?
The internal power-on reset circuit ensures that the output DACs power up to zero scale or midscale and remain there until a valid write takes place.
- What is the effect of the per channel power-down mode on the AD5676?
The per channel power-down mode reduces the current consumption of the device to 1 µA per channel.
- What is the maximum clock rate of the SPI interface on the AD5676?
The SPI interface operates at clock rates up to 50 MHz.
- In what packages is the AD5676 available?
The AD5676 is available in 20-lead TSSOP and LFCSP packages.
- What are some common applications of the AD5676?
The AD5676 is used in optical transceivers, base station power amplifiers, process control, industrial automation, and data acquisition systems.
