Overview
The AD9831ASTZ-REEL is a high-performance Direct Digital Synthesizer (DDS) integrated circuit produced by Analog Devices Inc. This device combines a Numerical Controlled Oscillator (NCO), a sine look-up table, frequency and phase modulators, and a 10-bit Digital-to-Analog Converter (DAC) on a single chip. It is designed to provide a flexible and integrated solution for RF and communications system designers.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 10-bit |
| Maximum Clock Frequency | 25 MHz |
| Output Frequency Range | fMCLK/2^32 * FREG (where FREG is the value loaded into the frequency register) |
| Phase Resolution | 12 bits (4096 phases) |
| Package Type | 48-TQFP |
| Lead Free Status / RoHS Status | Lead free / RoHS compliant |
| DAC Configuration | Single-ended operation |
| Full-Scale Output Current Adjustment | Adjustable via external resistor (RSET) |
Key Features
- Integrated NCO, sine look-up table, frequency and phase modulators, and a 10-bit DAC.
- High impedance current source DAC capable of driving a wide range of loads.
- Adjustable full-scale output current via an external resistor (RSET).
- Four phase registers for phase modulation.
- Pipeline delay of approximately 6 MCLK cycles for changes in FSELECT, PSEL0, and PSEL1 inputs.
- Data loaded into the device via a 16-bit data bus with address selection using A0-A2 inputs.
Applications
The AD9831ASTZ-REEL is suitable for various applications in RF and communications systems, including but not limited to:
- Wireless communication systems.
- RF signal generation.
- Phase and frequency modulation.
- Test and measurement equipment.
- Medical imaging and diagnostic equipment.
Q & A
- What is the maximum clock frequency of the AD9831ASTZ-REEL?
The maximum clock frequency is 25 MHz. - How is the output frequency of the AD9831ASTZ-REEL determined?
The output frequency is determined by the formula fMCLK/2^32 * FREG, where FREG is the value loaded into the frequency register. - What is the resolution of the phase modulation in the AD9831ASTZ-REEL?
The phase resolution is 12 bits, providing 4096 phases. - How is the full-scale output current of the DAC adjusted?
The full-scale output current is adjustable via an external resistor (RSET). - What is the package type of the AD9831ASTZ-REEL?
The package type is 48-TQFP. - Is the AD9831ASTZ-REEL lead-free and RoHS compliant?
Yes, it is lead-free and RoHS compliant. - How many phase registers does the AD9831ASTZ-REEL have?
The device has four phase registers. - What is the pipeline delay for changes in FSELECT, PSEL0, and PSEL1 inputs?
The pipeline delay is approximately 6 MCLK cycles. - How is data loaded into the AD9831ASTZ-REEL?
Data is loaded via a 16-bit data bus with address selection using A0-A2 inputs. - What are some typical applications of the AD9831ASTZ-REEL?
Typical applications include wireless communication systems, RF signal generation, phase and frequency modulation, test and measurement equipment, and medical imaging and diagnostic equipment.
