Overview
The AD9850BRSZ, produced by Analog Devices Inc., is a highly integrated CMOS device that utilizes advanced Direct Digital Synthesis (DDS) technology. This component combines a high-speed, high-performance D/A converter and a comparator to form a complete, digitally programmable frequency synthesizer and clock generator. It generates a spectrally pure, frequency/phase programmable analog output sine wave, which can be used directly or converted to a square wave for agile-clock generator applications. The device operates with a high degree of precision and flexibility, making it suitable for various high-frequency applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Clock Input Frequency Range (5 V Supply) | 1 - 125 | MHz |
| Clock Input Frequency Range (3.3 V Supply) | 1 - 110 | MHz |
| Pulse Width High/Low (5 V Supply, 25°C) | 3.2 | ns |
| Pulse Width High/Low (3.3 V Supply, 25°C) | 4.1 | ns |
| Full-Scale Output Current (RSET = 3.9 kΩ, 25°C) | 10.24 | mA |
| Full-Scale Output Current (RSET = 1.95 kΩ, 25°C) | 20.48 | mA |
| Gain Error (25°C) | -10 to +10 | % FS |
| Gain Temperature Coefficient | 150 | ppm/°C |
| Output Offset (25°C) | Varies | |
| Frequency Tuning Word | 32-bit | |
| Output Frequency Resolution (125 MHz Reference Clock) | 0.0291 | Hz |
| Maximum Output Frequency | 62.5 | MHz |
| Power Dissipation (3.3 V Supply) | 155 | mW |
| Operating Temperature Range | -40 to +85 | °C |
| Package Type | 28-lead SSOP |
Key Features
- Advanced DDS technology for precise frequency synthesis
- Internal high-speed, high-performance D/A converter and comparator
- 32-bit frequency tuning word for high resolution (0.0291 Hz with a 125 MHz reference clock)
- Digital phase modulation capability with 5 bits of control
- Ability to generate low jitter TTL/CMOS compatible output square wave
- Simplified control interface via parallel byte or serial loading format
- Low power dissipation of 155 mW at 3.3 V supply
- Extended industrial temperature range operation (-40°C to +85°C)
- Space-saving 28-lead SSOP package
Applications
- RF and Microwave systems
- Communications Analog Front Ends
- Frequency Dividers, Multipliers, and Detectors
- Phase Locked Loop (PLL) Synthesizer & Translation Loop
- Quadrature Digital Up Converters (QDUC)
- Agile clock generator applications
- Wireless Sensor Networks
- Tunable Filters and Voltage Controlled Oscillators (VCO)
Q & A
- What is the AD9850BRSZ used for? The AD9850BRSZ is used as a highly integrated, digitally programmable frequency synthesizer and clock generator.
- What is the maximum clock input frequency for the AD9850BRSZ? The maximum clock input frequency is 125 MHz for a 5 V supply and 110 MHz for a 3.3 V supply.
- What is the resolution of the output frequency? The output frequency resolution is 0.0291 Hz with a 125 MHz reference clock.
- How is the frequency tuning word loaded into the AD9850BRSZ? The frequency tuning word can be loaded via a parallel byte or serial loading format.
- What is the power dissipation of the AD9850BRSZ? The power dissipation is 155 mW at a 3.3 V supply.
- What is the operating temperature range of the AD9850BRSZ? The operating temperature range is -40°C to +85°C.
- What package type is the AD9850BRSZ available in? The AD9850BRSZ is available in a 28-lead SSOP package.
- Can the AD9850BRSZ generate a square wave output? Yes, the AD9850BRSZ can generate a low jitter TTL/CMOS compatible output square wave using its internal comparator.
- What is the maximum output frequency of the AD9850BRSZ? The maximum output frequency is 62.5 MHz.
- Does the AD9850BRSZ support phase modulation? Yes, the AD9850BRSZ supports digital phase modulation with 5 bits of control.
