Overview
The AD9854ASTZ is a highly integrated digital synthesizer produced by Analog Devices Inc. It utilizes advanced Direct Digital Synthesis (DDS) technology, combined with two internal high-speed, high-performance quadrature Digital-to-Analog Converters (DACs). This device is designed to generate highly stable, frequency-phase, and amplitude-programmable sine and cosine outputs, making it suitable for various applications such as communications, radar, and other high-frequency systems. The AD9854ASTZ operates on a single 3.3 V supply and is specified to function over an extended industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Frequency Resolution | 48-bit (1 μHz tuning resolution with 300 MHz SYSCLK) | |
| Maximum Output Frequency | Up to 150 MHz | |
| DAC Resolution | 12-bit I and Q DACs | |
| Phase Registers | Two 14-bit phase registers | |
| REFCLK Multiplier | Programmable 4× to 20× REFCLK multiplier | |
| Supply Voltage | 3.3 V ± 5% | V |
| Operating Temperature Range | −40°C to +85°C | °C |
| Residual Phase Noise (at 5 MHz, 1 kHz offset) | 140 dBc/Hz | dBc/Hz |
| Clock Generator Output Jitter (at 5 MHz) | 23 ps rms | ps |
Key Features
- Advanced DDS technology with 48-bit frequency resolution and 1 μHz tuning resolution with a 300 MHz SYSCLK.
- Simultaneous quadrature output signals up to 150 MHz, tunable at a rate of up to 100 million new frequencies per second.
- 12-bit I and Q DACs for excellent wideband and narrow-band output Spurious-Free Dynamic Range (SFDR).
- Programmable amplitude modulation, on/off output shaped keying, and precise amplitude control of the quadrature output.
- Chirp functionality for wide bandwidth frequency sweeping applications.
- Single-pin conventional FSK and enhanced spectral qualities of ramped FSK supported.
- Internal comparator for converting sine wave output to square wave for agile clock generator applications.
- Pin-for-pin compatibility with the AD9852 single-tone synthesizer.
Applications
- Communications systems: The AD9854ASTZ is suitable for agile Local Oscillator (LO) applications in various communication systems.
- Radar systems: Its high stability and precision make it ideal for radar applications.
- High-frequency test and measurement: The device's ability to generate precise and stable frequencies makes it useful in test and measurement equipment).
- Agile clock generators: The internal comparator allows for the conversion of sine wave outputs to square waves, making it suitable for high-speed clock generator applications).
Q & A
- What is the frequency resolution of the AD9854ASTZ?
The AD9854ASTZ has a 48-bit frequency resolution, providing 1 μHz tuning resolution with a 300 MHz SYSCLK).
- What is the maximum output frequency of the AD9854ASTZ?
The maximum output frequency is up to 150 MHz).
- What is the resolution of the I and Q DACs in the AD9854ASTZ?
The I and Q DACs have a resolution of 12 bits each).
- Does the AD9854ASTZ support phase modulation?
Yes, the device supports phase modulation with two 14-bit phase registers and a single pin for BPSK operation).
- What is the operating temperature range of the AD9854ASTZ?
The operating temperature range is −40°C to +85°C).
- Can the AD9854ASTZ generate square wave outputs?
Yes, the internal comparator can convert the sine wave output to a square wave for agile clock generator applications).
- What is the purpose of the REFCLK multiplier in the AD9854ASTZ?
The REFCLK multiplier internally generates the 300 MHz system clock from an external lower frequency reference clock, saving the user the expense and difficulty of implementing a 300 MHz system clock source).
- Is the AD9854ASTZ compatible with other Analog Devices products?
Yes, it is pin-for-pin compatible with the AD9852 single-tone synthesizer).
- What are some common applications of the AD9854ASTZ?
Common applications include communications systems, radar systems, high-frequency test and measurement, and agile clock generators).
- What is the supply voltage for the AD9854ASTZ?
The supply voltage is 3.3 V ± 5%).
