Overview
The AD5668BCPZ-2-RL7 is a high-precision, octal, 16-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This device is part of the denseDAC family and is known for its low power consumption and high accuracy. It operates from a single 2.7 V to 5.5 V supply and features an on-chip reference with a temperature coefficient of 5 ppm/°C. The AD5668BCPZ-2-RL7 is available in a 16-lead LFCSP package and is suitable for a wide range of applications requiring precise analog output.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/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 | ||
| Offset Error | ±6 | ±19 | mV | ||
| VDD | 2.7 | 5.5 | V | ||
| IDD (Normal Mode) | 1.0 | 1.5 | 1.8 | mA | Internal reference off/on |
| IDD (All Power-Down Modes) | 0.2 | 1 | µA | VDD = 2.7 V to 3.6 V | |
| Temperature Range | -40 | 105 | °C | ||
| Output Voltage Settling Time | 2.5 | 7 | µs | ¼ to ¾ scale settling to ±2 LSB | |
Key Features
- Octal, 16-bit digital-to-analog converter with on-chip precision output amplifier enabling rail-to-rail output swing
- On-chip reference with 5 ppm/°C temperature coefficient, and options for 1.25 V or 2.5 V full-scale output ranges
- Power-on reset circuit ensuring DAC output powers up to 0 V or midscale and remains at this level until a valid write takes place
- Power-down feature reducing current consumption to 400 nA at 5 V with software-selectable output loads
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating at clock rates up to 50 MHz
- Guaranteed monotonic by design to ensure accurate and reliable performance
- Asynchronous CLR function to update all DACs to a user-programmable code—zero scale, midscale, or full scale
Applications
- Industrial control systems requiring precise analog output
- Aerospace and defense applications, supported by the AD5668-EP model which meets AQEC standards
- Medical devices and diagnostic equipment needing high accuracy and reliability
- Automotive systems, particularly those requiring low power consumption and high precision
- Test and measurement equipment where accurate analog signals are crucial
Q & A
- What is the resolution of the AD5668BCPZ-2-RL7? The AD5668BCPZ-2-RL7 has a resolution of 16 bits.
- What is the temperature coefficient of the on-chip reference? The on-chip reference has a temperature coefficient of 5 ppm/°C.
- What are the available full-scale output ranges for the AD5668BCPZ-2-RL7? The available full-scale output ranges are 2.5 V and 5 V, depending on the reference configuration.
- How does the power-on reset circuit function? 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 in power-down mode? The current consumption in power-down mode is reduced to 400 nA at 5 V.
- What interface standards is the AD5668BCPZ-2-RL7 compatible with? The device is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- What is the maximum clock rate for the serial interface? The serial interface operates at clock rates up to 50 MHz.
- Is the AD5668BCPZ-2-RL7 guaranteed monotonic? Yes, the device is guaranteed monotonic by design.
- What is the asynchronous CLR function used for? The asynchronous CLR function updates all DACs to a user-programmable code—zero scale, midscale, or full scale.
- What are some common applications for the AD5668BCPZ-2-RL7? Common applications include industrial control systems, aerospace and defense, medical devices, automotive systems, and test and measurement equipment.
