Overview
The AD9122BCPZRL is a dual 16-bit, high dynamic range digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the TxDAC+® family and is designed for high-performance, direct conversion transmit applications. It offers a sample rate of 1230 MSPS, enabling multicarrier generation up to the Nyquist frequency. The AD9122 is optimized for complex digital modulation and includes features such as gain and offset compensation, making it suitable for various wireless communication systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16-bit | |
| Sample Rate | 1230 MSPS | |
| Full-Scale Output Current | 8.7 mA to 31.7 mA | |
| Analog Supply Voltage | 3.3 V | |
| Clock Supply Voltage | 1.8 V | |
| Package Type | 72-lead LFCSP | |
| Power Consumption | 1.5 W at 1.2 GSPS, 800 mW at 500 MSPS | |
| Spurious-Free Dynamic Range (SFDR) | 78 dBc at fDAC = 100 MSPS, fOUT = 20 MHz |
Key Features
- Flexible LVDS interface allowing word, byte, or nibble load
- Integrated 2×/4×/8× interpolator/complex modulator for carrier placement anywhere in the DAC bandwidth
- Gain, DC offset, and phase adjustment for sideband suppression
- Multiple chip synchronization interfaces
- High performance, low noise PLL clock multiplier
- Digital inverse sinc filter
- Adjustable analog output current (8.7 mA to 31.7 mA)
Applications
- Wireless infrastructure: W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE
- Digital high or low IF synthesis
- Transmit diversity
- Wideband communications: LMDS/MMDS, point-to-point
Q & A
- What is the sample rate of the AD9122BCPZRL?
The AD9122BCPZRL has a sample rate of 1230 MSPS. - What is the resolution of the AD9122BCPZRL?
The resolution is 16 bits. - What type of interface does the AD9122BCPZRL use?
The AD9122BCPZRL uses a flexible LVDS interface. - What are the typical applications of the AD9122BCPZRL?
Typical applications include wireless infrastructure, digital high or low IF synthesis, transmit diversity, and wideband communications. - What is the power consumption of the AD9122BCPZRL?
The power consumption is 1.5 W at 1.2 GSPS and 800 mW at 500 MSPS. - What is the package type of the AD9122BCPZRL?
The package type is a 72-lead LFCSP. - Can the AD9122BCPZRL be used in defense and aerospace applications?
Yes, the AD9122-EP version supports defense and aerospace applications (AQEC). - How can the full-scale output current of the AD9122BCPZRL be adjusted?
The full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA. - What is the purpose of the digital inverse sinc filter in the AD9122BCPZRL?
The digital inverse sinc filter is used to compensate for the sinc roll-off inherent in the DAC's output. - How is the AD9122BCPZRL programmed?
The AD9122BCPZRL can be programmed via a 4-wire serial port interface.
