AD9851BRSZ

Product Overview

• Category: Integrated Circuit
• Use: Frequency Synthesizer
• Characteristics: High-resolution, low-phase noise, wide frequency range
• Package: Small Outline Integrated Circuit (SOIC)
• Essence: Digital-to-Analog Converter (DAC) with Direct Digital Synthesis (DDS) technology
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Resolution: 10 bits
• Frequency Range: 0 to 70 MHz
• Output Amplitude Range: 0.6 Vpp to 2.4 Vpp
• Phase Noise: -138 dBc/Hz at 10 kHz offset
• Power Supply: 3.3 V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD9851BRSZ has a total of 28 pins. The pin configuration is as follows:

1. REFOUT
2. REFIN
3. AGND
4. DGND
5. AVDD
6. DVDD
7. NC
8. NC
9. FQ_UD
10. W_CLK
11. DATA
12. RESET
13. D7
14. D6
15. D5
16. D4
17. D3
18. D2
19. D1
20. D0
21. I/O_RESET
22. I/O_UPDATE
23. I/O_DATA
24. I/OWCLK
25. I/OFQUD
26. SLEEP
27. MCLK
28. OUT

Functional Features

• Direct digital synthesis for generating precise frequency signals
• Programmable phase and frequency control
• Serial interface for easy integration with microcontrollers
• Low power consumption
• Fast frequency hopping capability

Advantages and Disadvantages

Advantages: - High-resolution output - Low-phase noise for accurate signal generation - Wide frequency range for versatile applications - Small package size for space-constrained designs - Easy integration with microcontrollers

Disadvantages: - Limited output amplitude range - Requires external components for filtering and amplification

Working Principles

The AD9851BRSZ utilizes Direct Digital Synthesis (DDS) technology to generate precise frequency signals. It consists of a digital-to-analog converter (DAC), phase accumulator, and a sine wave lookup table. The desired frequency and phase information is programmed into the device through a serial interface. The DAC converts the digital values into analog voltages, which are then used to generate the desired waveform. The phase accumulator controls the phase progression of the waveform, while the sine wave lookup table provides the actual waveform samples.

Detailed Application Field Plans

The AD9851BRSZ finds applications in various fields, including:

1. Communications: Frequency synthesis for wireless transceivers, software-defined radios, and base stations.
2. Test and Measurement: Signal generation for calibration, frequency response analysis, and waveform synthesis.
3. Instrumentation: Precision frequency generation for scientific instruments, signal generators, and function generators.
4. Radar Systems: Frequency agility for radar systems, target simulation, and signal processing.
5. Audio Equipment: Frequency synthesis for audio signal generation, tone generation, and musical instrument synthesis.

Alternative Models

Other alternative models that offer similar functionality to the AD9851BRSZ include:

1. AD9833: 12-bit resolution, 0 to 12.5 MHz frequency range.
2. AD9959: 14-bit resolution, 0 to 400 MHz frequency range.
3. AD9910: 10-bit resolution, 0 to 400 MHz frequency range.

These alternative models provide options with different resolution, frequency range, and additional features to suit specific application requirements.

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