Overview
The AD5668BCPZ-1-RL7 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 AD5668 series, which is known for its high precision and versatility. It operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design, ensuring reliable performance across its operating range.
The AD5668BCPZ-1-RL7 features an on-chip reference with an internal gain of 2, providing a full-scale output range of 2.5 V or 5 V depending on the reference configuration. The device includes a power-on reset circuit and a power-down feature that significantly reduces current consumption to 400 nA at 5 V, making it suitable for power-sensitive applications.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Resolution | 16 bits | |
| Number of DAC Channels | 8 | |
| Output Type | Voltage | Unipolar |
| Supply Voltage | 2.7 V to 5.5 V | |
| Internal Reference | 1.25 V or 2.5 V, 5 ppm/°C | Full-scale output range of 2.5 V or 5 V |
| Relative Accuracy | ±8 LSB | |
| Differential Nonlinearity | ±1 LSB | |
| Zero-Code Error | 6 mV to 19 mV | All 0s loaded to DAC register |
| Full-Scale Error | −0.2% to −1% FSR | All 1s loaded to DAC register |
| Gain Error | ±1% FSR | |
| Gain Temperature Coefficient | ±2.5 ppm/°C | |
| Power Consumption (Normal Mode) | 1.0 mA to 2.25 mA | VDD = 2.7 V to 3.6 V, internal reference on/off |
| Power Consumption (Power-Down Mode) | 0.2 μA to 1 μA | VDD = 2.7 V to 3.6 V |
| Operating Temperature Range | −40°C to +105°C | |
| Package Type | 16-Lead LFCSP (4mm x 4mm) |
Key Features
- Versatile Serial Interface: Compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards, operating at clock rates up to 50 MHz.
- On-Chip Reference: Internal reference with an internal gain of 2, providing full-scale output ranges of 2.5 V or 5 V.
- Power-On Reset and Power-Down: Ensures DAC output powers up to 0 V or midscale and reduces current consumption to 400 nA in power-down mode.
- Rail-to-Rail Output Amplifier: Enables full output swing from the supply rails.
- Simultaneous Update of DAC Channels: Using the LDAC function, with user-selectable DAC channels for simultaneous update.
- Asynchronous CLR Function: Updates all DACs to a user-programmable code—zero scale, midscale, or full scale.
Applications
- Industrial Control Systems: For precise voltage output in control systems, such as in process control and automation.
- Medical Devices: In medical equipment requiring high precision and reliability, such as in diagnostic and therapeutic devices.
- Aerospace and Defense: For applications requiring high accuracy and low power consumption, such as in navigation and communication systems.
- Automotive Systems: In automotive electronics, including engine control units and safety systems.
- Test and Measurement Equipment: For generating precise voltage levels in test and measurement instruments.
Q & A
- What is the resolution of the AD5668BCPZ-1-RL7 DAC?
The AD5668BCPZ-1-RL7 has a resolution of 16 bits.
- How many DAC channels does the AD5668BCPZ-1-RL7 have?
The device has 8 DAC channels.
- What is the supply voltage range for the AD5668BCPZ-1-RL7?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the internal reference voltage of the AD5668BCPZ-1-RL7?
The internal reference voltage is 1.25 V or 2.5 V with a temperature coefficient of 5 ppm/°C.
- What is the power consumption of the AD5668BCPZ-1-RL7 in normal mode?
The power consumption is between 1.0 mA and 2.25 mA, depending on the internal reference being on or off.
- How does the power-down feature work on the AD5668BCPZ-1-RL7?
The power-down feature reduces the current consumption to 400 nA at 5 V and allows software-selectable output loads while in power-down mode.
- What is the operating temperature range of the AD5668BCPZ-1-RL7?
The operating temperature range is from −40°C to +105°C.
- What package type is the AD5668BCPZ-1-RL7 available in?
The device is available in a 16-Lead LFCSP (4mm x 4mm) package.
- Is the AD5668BCPZ-1-RL7 compatible with standard serial interfaces?
Yes, it is compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards.
- Does the AD5668BCPZ-1-RL7 have a rail-to-rail output amplifier?
Yes, the device features an on-chip precision output amplifier with rail-to-rail operation.
