Overview
The AD9851BRSRL, produced by Analog Devices Inc., is a highly integrated CMOS 180 MHz Direct Digital Synthesis (DDS)/Digital-to-Analog Converter (DAC) synthesizer. This device leverages advanced DDS technology, combined with an internal high-speed, high-performance DAC and a comparator, to form a digitally programmable frequency synthesizer and clock generator. It generates a stable, frequency and phase-programmable digitized analog output sine wave, which can be used directly or converted internally to a square wave for agile-clock generator applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | |
|---|---|---|---|---|---|
| Frequency Range (6× REFCLK Multiplier Disabled) | 5.0 V Supply | 1 | 180 | MHz | |
| Frequency Range (6× REFCLK Multiplier Disabled) | 3.3 V Supply | 1 | 125 | MHz | |
| Frequency Range (6× REFCLK Multiplier Disabled) | 2.7 V Supply | 0°C to 85°C | 1 | 100 | MHz |
| Frequency Range (6× REFCLK Multiplier Enabled) | 5.0 V Supply | 5 | 30 | MHz | |
| Frequency Range (6× REFCLK Multiplier Enabled) | 3.3 V Supply | 5 | 20.83 | MHz | |
| Frequency Range (6× REFCLK Multiplier Enabled) | 2.7 V Supply | 0°C to 85°C | 5 | 16.66 | MHz |
| Duty Cycle | Full IV | 45 | 60 | % | |
| Input Resistance | 25°C | V | 1 | MΩ | |
| Supply Voltage | 2.7 | 5.25 | V | ||
| Power Dissipation | 555 | mW | |||
| Operating Temperature Range | -40 | +85 | °C | ||
| Package Type | SSOP-28-208mil |
Key Features
- Advanced DDS technology with a 32-bit frequency tuning word, providing an output tuning resolution of approximately 0.04 Hz with a 180 MHz system clock.
- Internal high-speed, high-performance DAC and comparator.
- 6× REFCLK Multiplier circuit that eliminates the need for a high-speed reference oscillator.
- Five bits of programmable phase modulation resolution, enabling phase shifting in increments of 11.25°.
- Asynchronous loading of frequency tuning, control, and phase modulation words via parallel or serial formats.
- Low jitter output pulse generation using the internal high-speed comparator.
- Operation over an extended industrial temperature range of -40°C to +85°C.
- Low power dissipation of 555 mW at the maximum clock rate of 180 MHz.
Applications
- Frequency synthesis and clock generation in various communication systems.
- Agile-clock generator applications.
- Phase-locked loop (PLL) circuits.
- Direct digital synthesis in test and measurement equipment.
- Wireless communication systems requiring precise frequency control.
Q & A
- What is the AD9851BRSRL used for?
The AD9851BRSRL is used as a digitally programmable frequency synthesizer and clock generator, leveraging advanced DDS technology.
- What is the maximum clock frequency of the AD9851BRSRL?
The maximum clock frequency is 180 MHz.
- What is the resolution of the frequency tuning word?
The resolution is approximately 0.04 Hz with a 180 MHz system clock.
- What is the purpose of the 6× REFCLK Multiplier?
The 6× REFCLK Multiplier eliminates the need for a high-speed reference oscillator.
- What is the phase modulation resolution of the AD9851BRSRL?
The phase modulation resolution is 11.25° increments.
- How is data loaded into the AD9851BRSRL?
Data is loaded asynchronously via parallel or serial formats.
- What is the power dissipation of the AD9851BRSRL at maximum clock rate?
The power dissipation is 555 mW at the maximum clock rate of 180 MHz.
- What is the operating temperature range of the AD9851BRSRL?
The operating temperature range is -40°C to +85°C.
- What package type is the AD9851BRSRL available in?
The AD9851BRSRL is available in a SSOP-28-208mil package.
- Is the AD9851BRSRL RoHS compliant?
Yes, the AD9851BRSRL is RoHS compliant.
