Overview
The AD9852AST is a highly integrated digital synthesizer produced by Analog Devices Inc. This device utilizes advanced Direct Digital Synthesis (DDS) technology, combined with a high-speed, high-performance Digital-to-Analog Converter (DAC). It is designed to address a wide range of applications, including communications, radar, and various other fields requiring agile local oscillators (LO) and clock generators. The AD9852AST operates on a single 3.3 V supply and is fabricated using 0.35 μ CMOS technology, ensuring high functionality and reliability over an extended industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Internal Clock Rate | - | 300 | - | MHz |
| Frequency Resolution | - | 1 μHz | - | - |
| Output Frequency Range | - | Up to 150 | - | MHz |
| Phase Accumulator Bits | - | 48 | - | - |
| DAC Resolution | - | 12-bit | - | - |
| Supply Voltage | 3.3 V - 5% | 3.3 V | 3.3 V + 5% | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | 80-LQFP (14x14) | - | - |
Key Features
- Advanced DDS technology with a 48-bit phase accumulator, providing 1 μHz frequency resolution.
- Internal high-speed, high-performance 12-bit DACs capable of generating output signals up to 150 MHz.
- Programmable reference clock multiplier circuit to generate a 300 MHz system clock from a lower frequency external reference clock.
- Support for FSK, BPSK, PSK, chirp, and AM operations.
- Internal comparator for converting the cosine wave output to a square wave, suitable for agile clock generator applications.
- Two 14-bit phase registers and a single pin for BPSK operation.
- Chirp functionality for wide bandwidth frequency sweeping applications.
- Static duty cycle control in high-speed clock generator applications using the 12-bit control DAC.
Applications
The AD9852AST is versatile and can be used in various applications, including:
- Communications systems: As an agile LO and for modulation schemes such as FSK, BPSK, and PSK.
- Radar systems: For generating high-frequency signals with precise control over frequency and phase.
- Clock generators: Utilizing the internal comparator to generate square wave outputs.
- Test and measurement equipment: For generating signals with high frequency resolution and stability.
Q & A
- What is the internal clock rate of the AD9852AST?
The internal clock rate of the AD9852AST is 300 MHz. - What is the frequency resolution of the AD9852AST?
The frequency resolution of the AD9852AST is 1 μHz. - What is the maximum output frequency range of the AD9852AST?
The maximum output frequency range of the AD9852AST is up to 150 MHz. - What type of DAC does the AD9852AST use?
The AD9852AST uses a 12-bit high-speed DAC. - What is the operating temperature range of the AD9852AST?
The operating temperature range of the AD9852AST is −40°C to +85°C. - What package type is the AD9852AST available in?
The AD9852AST is available in an 80-LQFP (14x14) package. - Does the AD9852AST support BPSK operation?
Yes, the AD9852AST supports BPSK operation with two 14-bit phase registers and a single pin for BPSK. - Can the AD9852AST generate chirp signals?
Yes, the AD9852AST includes chirp functionality for wide bandwidth frequency sweeping applications. - How does the AD9852AST generate its system clock?
The AD9852AST can generate its 300 MHz system clock internally using a programmable reference clock multiplier circuit from a lower frequency external reference clock. - What modulation schemes does the AD9852AST support?
The AD9852AST supports FSK, BPSK, PSK, chirp, and AM operations.
