Overview
The AD9121BCPZ, produced by Analog Devices Inc., is a dual, 14-bit, high dynamic range digital-to-analog converter (DAC) designed for high-performance applications. It offers a sample rate of 1230 MSPS, enabling multicarrier generation up to the Nyquist frequency. This TxDAC+® converter is optimized for direct conversion transmit applications, including complex digital modulation and gain and offset compensation. The device is packaged in a 72-lead Lead Frame Chip Scale Package (LFCSP) and is known for its ultralow noise and intermodulation distortion (IMD), making it suitable for high-quality synthesis of wideband signals from baseband to high intermediate frequencies (IF).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Sample Rate | 1230 MSPS | |
| Full-Scale Output Current Range | 8.7 mA to 31.7 mA | |
| Power Consumption (2× Mode, fDAC = 491.22 MSPS, IF = 10 MHz, PLL Off) | 834 mW | |
| Power Consumption (8× Mode, fDAC = 800 MSPS, IF = 10 MHz, PLL Off) | 1135 mW | |
| Operating Temperature Range | -40°C to +85°C | |
| Package Type | 72-lead LFCSP | |
| Supply Voltages | AVDD33: 3.13 V to 3.47 V, CVDD18: 1.71 V to 1.89 V, DVDD18: 1.71 V to 1.89 V, IOVDD: 1.71 V to 3.47 V |
Key Features
- Ultralow noise and intermodulation distortion (IMD) for high-quality signal synthesis.
- Proprietary DAC output switching technique to enhance dynamic performance.
- Integrated 2×/4×/8× interpolator/complex modulator for flexible carrier placement.
- Gain, DC offset, and phase adjustment for sideband suppression.
- High performance, low noise PLL clock multiplier.
- Digital inverse sinc filter.
- Flexible LVDS digital interface allowing reduction of the standard 28-wire bus to half its width.
- 4-wire serial port interface for programming and readback of internal parameters.
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 resolution of the AD9121BCPZ DAC?
The AD9121BCPZ is a 14-bit digital-to-analog converter.
- What is the maximum sample rate of the AD9121BCPZ?
The maximum sample rate is 1230 MSPS.
- What is the range of the full-scale output current for the AD9121BCPZ?
The full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA.
- What are the typical power consumption values for the AD9121BCPZ?
Power consumption varies by mode, e.g., 834 mW in 2× mode with PLL off, and 1135 mW in 8× mode with PLL off.
- What is the operating temperature range of the AD9121BCPZ?
The operating temperature range is -40°C to +85°C.
- In what package type is the AD9121BCPZ available?
The AD9121BCPZ is available in a 72-lead Lead Frame Chip Scale Package (LFCSP).
- What are the supply voltage ranges for the AD9121BCPZ?
The supply voltages range from 3.13 V to 3.47 V for AVDD33, and 1.71 V to 1.89 V for CVDD18 and DVDD18, with IOVDD ranging from 1.71 V to 3.47 V.
- What are some of the key features of the AD9121BCPZ?
Key features include ultralow noise and IMD, proprietary DAC output switching technique, integrated interpolator/complex modulator, and a high performance, low noise PLL clock multiplier.
- In which applications is the AD9121BCPZ commonly used?
The AD9121BCPZ is commonly used in wireless infrastructure, digital high or low IF synthesis, transmit diversity, and wideband communications.
- How can the internal parameters of the AD9121BCPZ be programmed?
The internal parameters can be programmed using a 4-wire serial port interface.
