Overview
The AD5621AKSZ-REEL7, produced by Analog Devices Inc., is a 12-bit digital-to-analog converter (DAC) that is part of the nanoDAC family. This device operates from a single 2.7 V to 5.5 V supply and is known for its low power consumption, typically 75 µA at 5 V. It comes in a compact 6-lead SC70 package, making it ideal for space-constrained and power-sensitive applications. The AD5621 features a buffered voltage output and an on-chip precision output amplifier that allows for rail-to-rail output swing. It is designed for level-setting requirements, such as generating bias or control voltages, and is suitable for portable battery-operated equipment due to its low power characteristics.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Resolution | 12 Bits | ||||
| Power Supply Voltage (VDD) | 2.7 | 5.5 | V | ||
| Current Consumption (IDD) | 75 | 100 | µA | VDD = 4.5 V to 5.5 V | |
| Power-Down Current | 0.2 | µA | At 3 V | ||
| Relative Accuracy (INL) | ±1 | ±6 | LSB | B version: ±1 LSB, A version: ±6 LSB | |
| Differential Nonlinearity (DNL) | ±0.5 | ±0.5 | LSB | ||
| Output Voltage Range | 0 | VDD | V | ||
| Slew Rate | 0.5 | V/µs | |||
| Output Noise Spectral Density | 120 | nV/√Hz | DAC code = midscale, 1 kHz | ||
Key Features
- Low Power Consumption: Typically 75 µA at 5 V and power-down to 0.2 µA at 3 V.
- Compact Package: Available in 6-lead SC70 and LFCSP packages.
- Rail-to-Rail Output: On-chip precision output amplifier allows for rail-to-rail output swing.
- High-Speed Serial Interface: Compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, with clock rates up to 30 MHz.
- Power-On Reset and Brownout Detection: Ensures the DAC output powers up to 0 V and remains there until a valid write.
- Software-Selectable Output Loads in Power-Down Mode: Controlled over the serial interface.
- Guaranteed Monotonic by Design: Ensures that the output voltage always increases or remains the same for increasing digital input codes.
Applications
- Voltage Level Setting: Ideal for generating bias or control voltages.
- Portable Battery-Powered Instruments: Suitable due to low power consumption.
- Digital Gain and Offset Adjustment: Used in various analog circuits for precision adjustments.
- Programmable Voltage and Current Sources: Can be used to create adjustable sources.
- Programmable Attenuators: Useful in signal processing and transmission systems.
Q & A
- What is the resolution of the AD5621AKSZ-REEL7?
The AD5621AKSZ-REEL7 has a resolution of 12 bits.
- What is the power supply voltage range for the AD5621AKSZ-REEL7?
The power supply voltage range is from 2.7 V to 5.5 V.
- How much current does the AD5621AKSZ-REEL7 consume in normal operation?
Typically 75 µA at 5 V.
- What is the power-down current consumption of the AD5621AKSZ-REEL7?
Typically 0.2 µA at 3 V.
- What type of serial interface does the AD5621AKSZ-REEL7 use?
A 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, with clock rates up to 30 MHz.
- Does the AD5621AKSZ-REEL7 have a power-on reset feature?
Yes, it includes a power-on reset circuit that ensures the DAC output powers up to 0 V.
- What is the slew rate of the AD5621AKSZ-REEL7?
The slew rate is 0.5 V/µs.
- Is the AD5621AKSZ-REEL7 guaranteed to be monotonic?
Yes, it is guaranteed monotonic by design.
- What are some common applications of the AD5621AKSZ-REEL7?
Voltage level setting, portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
- In what package types is the AD5621AKSZ-REEL7 available?
It is available in 6-lead SC70 and LFCSP packages.
