Overview
The AD5668ARUZ-3, produced by Analog Devices Inc., is a low-power, octal, 16-bit, buffered voltage-output Digital-to-Analog Converter (DAC). This device operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design. It features an on-chip reference with an internal gain of 2, providing flexibility in output ranges. The AD5668ARUZ-3 is available in a 16-lead TSSOP package and is known for its high precision and reliability, making it suitable for a variety of applications requiring accurate analog output.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Resolution | 16 bits | ||||
| Relative Accuracy | ±8 | ±16 | LSB | See Figure 7 | |
| Differential Nonlinearity | ±1 | ±1 | LSB | Guaranteed monotonic by design | |
| Zero-Code Error | 6 | 19 | mV | All 0s loaded to DAC register | |
| Full-Scale Error | -0.2 | -1 | % FSR | All 1s loaded to DAC register | |
| Gain Error | ±1 | ±1 | % FSR | ||
| Gain Temperature Coefficient | ±2.5 | ±2.5 | ppm Of FSR/°C | ||
| Offset Error | ±6 | ±19 | mV | ||
| Power Supply Range | 2.7 | 5.5 | V | ||
| Power-Down Current | 400 | nA | At 5 V | ||
| Serial Interface Clock Rate | 50 | MHz | Compatible with SPI, QSPI, MICROWIRE, and DSP interface standards | ||
Key Features
- On-Chip Reference: The AD5668ARUZ-3 features an on-chip reference with an internal gain of 2, providing a full-scale output range of either 2.5 V or 5 V depending on the reference configuration.
- Power-On Reset and Power-Down: The device includes a power-on reset circuit ensuring the DAC output powers up to 0 V or midscale and remains at this level until a valid write takes place. It also has a power-down feature reducing current consumption to 400 nA at 5 V.
- Serial Interface: Utilizes a versatile 3-wire serial interface compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards, operating at clock rates up to 50 MHz.
- Output Amplifier: Features an on-chip precision output amplifier enabling rail-to-rail output swing.
- Simultaneous Update: The outputs of all DACs can be updated simultaneously using the LDAC function, with user-selectable DAC channels for simultaneous update.
- Asynchronous CLR: Allows updating all DACs to a user-programmable code—zero scale, midscale, or full scale.
Applications
- Industrial Automation: Suitable for applications requiring precise analog output in industrial control systems.
- Medical Devices: Used in medical equipment where high accuracy and reliability are crucial.
- Aerospace and Defense: The AD5668-EP model supports defense and aerospace applications, adhering to AQEC standards.
- Test and Measurement Equipment: Ideal for use in test and measurement instruments that require high precision analog outputs.
- Automotive Systems: Can be used in automotive systems that require reliable and accurate analog signals.
Q & A
- What is the resolution of the AD5668ARUZ-3?
The AD5668ARUZ-3 has a resolution of 16 bits.
- What is the operating voltage range of the AD5668ARUZ-3?
The device operates from a single 2.7 V to 5.5 V supply.
- What types of serial interfaces are supported by the AD5668ARUZ-3?
The device supports standard SPI, QSPI, MICROWIRE, and DSP interface standards.
- How does the power-on reset circuit function in the AD5668ARUZ-3?
The power-on reset circuit ensures that the DAC output powers up to 0 V or midscale and remains at this level until a valid write takes place.
- What is the current consumption of the AD5668ARUZ-3 in power-down mode?
The current consumption is reduced to 400 nA at 5 V in power-down mode.
- Can the outputs of all DACs be updated simultaneously?
Yes, the outputs of all DACs can be updated simultaneously using the LDAC function.
- What is the purpose of the asynchronous CLR function?
The asynchronous CLR function updates all DACs to a user-programmable code—zero scale, midscale, or full scale.
- Is the AD5668ARUZ-3 suitable for aerospace and defense applications?
The AD5668-EP model supports defense and aerospace applications, adhering to AQEC standards.
- What is the full-scale output range of the AD5668ARUZ-3?
The full-scale output range can be either 2.5 V or 5 V depending on the reference configuration.
- What is the gain temperature coefficient of the AD5668ARUZ-3?
The gain temperature coefficient is ±2.5 ppm Of FSR/°C.
