Overview
The AD9830ASTZ is a Direct Digital Synthesis (DDS) integrated circuit produced by Analog Devices Inc. This device is a numerically controlled oscillator that employs 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 up to 25 MHz and supports various modulation schemes, including phase and frequency modulation. The AD9830ASTZ is particularly useful in RF and communications systems, offering a high level of integration and flexibility for system designers.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 10 Bits | ||
| Update Rate (fMAX) | 50 MSPS max | ||
| IOUT Full Scale | 20 mA max | ||
| Output Compliance | 1 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 = fMAX, fOUT = 2 MHz | |
| Total Harmonic Distortion | -53 dBc max | fMCLK = fMAX, fOUT = 2 MHz | |
| Spurious Free Dynamic Range (SFDR) | -72 dBc min (±50 kHz), -68 dBc min (±200 kHz), -50 dBc min (±2 MHz) | fMCLK = 6.25 MHz, fOUT = 2.11 MHz | |
| Clock Feedthrough | -55 dBc typ | ||
| Wake Up Time | 1 ms typ | ||
| Power-Down Option | Yes | ||
| Voltage Reference | 1.21 Volts typ @ +25°C | Internal Reference | |
| Power Supply | +5 V | ||
| Power Consumption | 250 mW | ||
| Package | 48-LQFP |
Key Features
- On-chip sine look-up table and 10-bit DAC for high-quality sine wave generation.
- Support for phase and frequency modulation.
- Parallel loading capability.
- Power-down option for power management.
- Internal voltage reference.
- Low power consumption of 250 mW.
- High signal-to-noise ratio and low total harmonic distortion.
- Spurious free dynamic range (SFDR) of up to -72 dBc.
Applications
- DDS tuning in various RF and communications systems.
- Digital demodulation.
- Phase and frequency modulation schemes.
- RF signal generation up to 25 MHz.
- Use in complex modulation algorithms using DSP techniques.
Q & A
- What is the AD9830ASTZ? The AD9830ASTZ is a Direct Digital Synthesis (DDS) integrated circuit produced by Analog Devices Inc., designed for generating high-quality sine waves and supporting various modulation schemes.
- What is the maximum update rate of the AD9830ASTZ? The maximum update rate is 50 MSPS.
- What is the resolution of the DAC in the AD9830ASTZ? The DAC has a resolution of 10 bits.
- Does the AD9830ASTZ support power-down? Yes, it has a power-down option for power management.
- What is the typical power consumption of the AD9830ASTZ? The typical power consumption is 250 mW.
- What is the SFDR of the AD9830ASTZ? The SFDR is up to -72 dBc in narrow band conditions.
- What package type is the AD9830ASTZ available in? It is available in a 48-LQFP package.
- What are the typical applications of the AD9830ASTZ? Typical applications include DDS tuning, digital demodulation, and phase and frequency modulation in RF and communications systems.
- Does the AD9830ASTZ have an internal voltage reference? Yes, it has an internal voltage reference of 1.21 Volts typ at +25°C.
- What is the wake-up time of the AD9830ASTZ from power-down mode? The wake-up time is typically 1 ms.
