Overview
The AD9831ASTZ is a Direct Digital Synthesizer (DDS) produced by Analog Devices Inc. This device is a numerically controlled oscillator that integrates a phase accumulator, a sine look-up table, and a 10-bit Digital-to-Analog Converter (DAC) on a single CMOS chip. It is designed to generate high-quality sine waves and supports both phase and frequency modulation. The AD9831ASTZ operates with clock frequencies up to 25 MHz and is suitable for various RF and communications applications.
Key Specifications
| Parameter | Units | Test Conditions/Comments |
|---|---|---|
| Resolution | 10 Bits | |
| Update Rate (fMAX) | 25 MSPS (nom) | |
| IOUT Full Scale | 4 mA (nom), 5 mA (max) | |
| Output Compliance | 1.5 V (max) | |
| DC Accuracy - Integral Nonlinearity | ±1 LSB (typ) | |
| DC Accuracy - Differential Nonlinearity | ±0.5 LSB (typ) | |
| Signal to Noise Ratio | 50 dB (min) @ fMCLK = 25 MHz, fOUT = 1 MHz | |
| Total Harmonic Distortion | -53 dBc (max) @ fMCLK = 25 MHz, fOUT = 1 MHz | |
| Spurious Free Dynamic Range (SFDR) | -72 dBc (min) @ fMCLK = 6.25 MHz, fOUT = 2.11 MHz (narrow band) | |
| Clock Feedthrough | -60 dBc (typ) | |
| Wake-Up Time | 1 ms (typ) | |
| Power Consumption | 125 mW (5 V), 40 mW (3 V) | |
| Package | 48-Pin LQFP | |
| Operating Temperature | -40°C to 85°C |
Key Features
- Integrated phase accumulator, sine look-up table, and 10-bit DAC on a single CMOS chip.
- Supports both phase and frequency modulation.
- Operates with clock frequencies up to 25 MHz.
- Powerdown option for low power consumption.
- High impedance current source DAC capable of driving a wide range of loads.
- Full-scale output current adjustable via an external resistor (RSET).
- Spurious Free Dynamic Range (SFDR) of -72 dBc in narrow band.
- Low power consumption: 125 mW at 5 V and 40 mW at 3 V.
Applications
- DDS Tuning
- Digital Demodulation
- RF and Communications systems
- Phase and Frequency Modulation
- Signal Generation in Test and Measurement Equipment
Q & A
- What is the AD9831ASTZ?
The AD9831ASTZ is a Direct Digital Synthesizer (DDS) produced by Analog Devices Inc., integrating a phase accumulator, a sine look-up table, and a 10-bit DAC on a single CMOS chip.
- What are the key specifications of the AD9831ASTZ?
The key specifications include a 10-bit resolution, an update rate of 25 MSPS, full-scale output current of 4 mA, and a SFDR of -72 dBc in narrow band.
- What modulation capabilities does the AD9831ASTZ support?
The AD9831ASTZ supports both phase and frequency modulation.
- What is the power consumption of the AD9831ASTZ?
The power consumption is 125 mW at 5 V and 40 mW at 3 V.
- What is the operating temperature range of the AD9831ASTZ?
The operating temperature range is -40°C to 85°C.
- What package type is the AD9831ASTZ available in?
The AD9831ASTZ is available in a 48-Pin LQFP package.
- Can the AD9831ASTZ be powered down for low power consumption?
- How is the full-scale output current of the DAC adjusted?
The full-scale output current of the DAC can be adjusted using an external resistor (RSET).
- What are some common applications of the AD9831ASTZ?
- Is there an evaluation board available for the AD9831ASTZ?
