Overview
The AD9912ABCPZ-REEL7 is a high-performance direct digital synthesizer (DDS) produced by Analog Devices Inc. This component integrates a 14-bit digital-to-analog converter (DAC) and operates at an internal clock speed of 1 GSPS, enabling output frequencies up to 400 MHz. The AD9912 features a 48-bit frequency tuning word, allowing for fine frequency resolution of 4 Hz. It also includes an on-chip low noise phase-locked loop (PLL) and supports flexible system clock inputs, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Internal Clock Speed | - | 1 GSPS | - | - | Up to 400 MHz output directly |
| DAC Resolution | - | 14-bit | - | - | Integrated DAC |
| Frequency Tuning Word | - | 48-bit | - | - | 4 Hz resolution |
| System Clock Input Range | 25 MHz | - | 1000 MHz | - | Accepts crystal or external reference clock |
| Operating Temperature Range | -40°C | - | +85°C | - | Industrial temperature range |
| Power Supply Current (DAC) | 205 mA | - | 246 mA | - | IDVDD, SpurKiller off |
| Power Supply Current (Digital I/O) | 2 mA | - | 3 mA | - | IDVDD_I/O, varies dynamically |
Key Features
- Integrated 1 GSPS 14-bit DAC for high-resolution signal generation
- 48-bit frequency tuning word with 4 Hz resolution for precise frequency control
- Flexible system clock input accepting either crystal or external reference clock
- On-chip low noise PLL REFCLK multiplier for stable clock generation
- 2 SpurKiller channels to reduce spurious signals
- Low jitter clock doubler for frequencies up to 750 MHz
- Single-ended CMOS comparator and differential HSTL comparator
- Programmable output divider for CMOS output
- Serial I/O control for software-controlled operations
Applications
- Test and measurement equipment
- Wireless base stations and controllers
- Secure communications systems
- Fast frequency hopping systems
- Radar and electronic warfare systems
Q & A
- What is the internal clock speed of the AD9912?
The AD9912 operates at an internal clock speed of 1 GSPS, enabling output frequencies up to 400 MHz. - What is the resolution of the integrated DAC?
The AD9912 features a 14-bit DAC. - What is the resolution of the frequency tuning word?
The frequency tuning word is 48-bit, allowing for a resolution of 4 Hz. - What is the operating temperature range of the AD9912?
The AD9912 operates over an industrial temperature range spanning -40°C to +85°C. - What types of system clock inputs does the AD9912 support?
The AD9912 supports system clock inputs from either crystal or external reference clock sources. - Does the AD9912 have any features to reduce spurious signals?
Yes, the AD9912 includes 2 SpurKiller channels to reduce spurious signals. - What is the maximum frequency supported by the low jitter clock doubler?
The low jitter clock doubler supports frequencies up to 750 MHz. - What types of comparators are available on the AD9912?
The AD9912 features both single-ended CMOS and differential HSTL comparators. - Can the AD9912 be controlled via software?
Yes, the AD9912 supports serial I/O control for software-controlled operations. - What are some common applications of the AD9912?
The AD9912 is commonly used in test and measurement equipment, wireless base stations, secure communications systems, and fast frequency hopping systems.
