Overview
The AD9850BRS-REEL, 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 high-speed 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 AD9850 operates over an extended industrial temperature range of –40°C to +85°C and is available in a space-saving 28-lead SSOP surface-mount package.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Frequency Range (5V Supply) | 1 | - | 125 | MHz |
| Frequency Range (3.3V Supply) | 1 | - | 110 | MHz |
| Pulse Width High/Low (5V Supply, 25°C) | 3.2 | - | - | ns |
| Pulse Width High/Low (3.3V 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 | - | 10 | % FS |
| Gain Temperature Coefficient (Full V) | - | - | 150 | ppm/°C |
| Output Offset (25°C, 5V Supply) | - | - | 30 | mV |
| Max Power Dissipation | - | - | 480 | mW |
| Max Supply Current | - | - | 96 | mA |
| Max Supply Voltage | - | - | 5.25 | V |
| Min Operating Temperature | -40 | - | - | °C |
| Max Operating Temperature | - | - | 85 | °C |
| Number of Bits | - | - | 10 | - |
| Number of D/A Converters | - | - | 1 | - |
| Number of Outputs | - | - | 1 | - |
| Number of Pins | - | - | 28 | - |
Key Features
- 125 MHz clock rate with the ability to generate output frequencies up to one-half the reference clock frequency (or 62.5 MHz).
- On-chip high-performance D/A converter and high-speed comparator.
- 32-bit frequency tuning word, providing an output tuning resolution of 0.0291 Hz with a 125 MHz reference clock.
- Simplified control interface with parallel byte or serial loading format.
- Phase modulation capability.
- Low power dissipation of 155 mW at 3.3 V supply.
- Extended industrial temperature range of –40°C to +85°C.
Applications
The AD9850BRS-REEL is versatile and can be used in various applications, including:
- Frequency synthesis and clock generation in communication systems.
- Agile-clock generator applications where fast and precise frequency changes are required.
- Phase-continuous waveform generation in radar, navigation, and test equipment.
- Industrial automation and control systems requiring high-resolution frequency control.
- Aerospace and defense systems where precise frequency synthesis is critical.
Q & A
- What is the maximum clock rate of the AD9850BRS-REEL? The maximum clock rate is 125 MHz.
- What is the resolution of the frequency tuning word? The AD9850BRS-REEL has a 32-bit frequency tuning word, providing a resolution of 0.0291 Hz with a 125 MHz reference clock.
- What is the operating temperature range of the AD9850BRS-REEL? The operating temperature range is –40°C to +85°C.
- How many D/A converters does the AD9850BRS-REEL have? It has one 10-bit high-speed D/A converter.
- What is the power dissipation of the AD9850BRS-REEL at 3.3 V supply? The power dissipation is 155 mW at 3.3 V supply.
- What package type is the AD9850BRS-REEL available in? It is available in a 28-lead SSOP surface-mount package.
- Does the AD9850BRS-REEL support phase modulation? Yes, it supports phase modulation.
- What is the maximum supply voltage for the AD9850BRS-REEL? The maximum supply voltage is 5.25 V.
- Is the AD9850BRS-REEL RoHS compliant? No, it is not RoHS compliant.
- What is the typical gain error of the AD9850BRS-REEL? The typical gain error is within ±10% FS.
