Overview
The AD9121BCPZRL is a dual, 14-bit, high dynamic range digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the TxDAC+® family and is optimized for direct conversion transmit applications. It features a sample rate of up to 1230 MSPS, enabling the generation of multicarrier signals up to the Nyquist frequency. The AD9121 includes integrated 2×/4×/8× interpolators and complex modulators, along with gain, DC offset, and phase adjustment capabilities for sideband suppression. It is particularly suited for wireless infrastructure and wideband communication systems due to its high performance, low noise, and low power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Sample Rate | Up to 1230 MSPS | |
| Interpolation Factors | 2×, 4×, 8× | |
| Full-Scale Output Current | 8.7 mA to 31.7 mA | |
| Power Consumption | 1.5 W at 1.2 GSPS, 800 mW at 500 MSPS | |
| Package Type | 72-lead LFCSP | |
| Operating Temperature Range | -40°C to +85°C | |
| 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 | |
| Latency (DACCLK Cycles) | 1×: 64 cycles, 2×: 135 cycles, 4×: 292 cycles, 8×: 608 cycles |
Key Features
- Ultralow noise and intermodulation distortion (IMD) for high-quality signal synthesis.
- Proprietary DAC output switching technique to enhance dynamic performance.
- Flexible LVDS digital interface allowing for a reduced bus width.
- Current outputs easily configured for various single-ended or differential circuit topologies.
- Integrated high-performance, low-noise PLL clock multiplier and digital inverse sinc filter.
- Multiple chip synchronization interfaces for synchronized operation.
- 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 maximum sample rate of the AD9121BCPZRL?
The AD9121BCPZRL has a maximum sample rate of up to 1230 MSPS. - What are the interpolation factors available on the AD9121BCPZRL?
The AD9121BCPZRL supports interpolation factors of 2×, 4×, and 8×. - What is the full-scale output current range of the AD9121BCPZRL?
The full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA. - What is the typical power consumption of the AD9121BCPZRL?
The typical power consumption is 1.5 W at 1.2 GSPS and 800 mW at 500 MSPS. - What package type does the AD9121BCPZRL come in?
The AD9121BCPZRL comes in a 72-lead LFCSP package. - What is the operating temperature range of the AD9121BCPZRL?
The operating temperature range is -40°C to +85°C. - What are the supply voltage ranges for the AD9121BCPZRL?
The supply voltage ranges are AVDD33: 3.13 V to 3.47 V, CVDD18: 1.71 V to 1.89 V, DVDD18: 1.71 V to 1.89 V, and IOVDD: 1.71 V to 3.47 V. - What are some of the key applications of the AD9121BCPZRL?
Key applications include wireless infrastructure, digital high or low IF synthesis, transmit diversity, and wideband communications. - Does the AD9121BCPZRL support multiple chip synchronization?
Yes, the AD9121BCPZRL supports multiple chip synchronization interfaces. - How is the AD9121BCPZRL programmed and configured?
The AD9121BCPZRL is programmed and configured through a 4-wire serial port interface.
