Overview
The AD9778BSVZRL is a high-performance, dual 14-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the AD9776/AD9778/AD9779 family, which is designed for high dynamic range applications. It offers a sample rate of 1 GSPS, enabling multicarrier generation up to the Nyquist frequency. The AD9778BSVZRL is optimized for direct conversion transmit applications, featuring complex digital modulation, gain, and offset compensation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 | - | - | Bits |
| Differential Nonlinearity (DNL) | ±0.65 | - | - | LSB |
| Integral Nonlinearity (INL) | ±1 | - | - | LSB |
| Main DAC Output Offset Error | -0.001 | 0 | +0.001 | % FSR |
| Main DAC Output Gain Error (with Internal Reference) | -0.001 | 0 | +0.001 | % FSR |
| Analog Supply Voltages (AVDD33) | 3.13 | 3.3 | 3.47 | V |
| Digital Supply Voltages (DVDD33) | 3.13 | 3.3 | 3.47 | V |
| Power Consumption (1× Mode, fDAC = 100 MSPS, IF = 1 MHz) | 250 | 300 | 350 | mW |
| Operating Temperature Range | -40 | - | +85 | °C |
| Package Type | - | - | - | 100-lead TQFP (14mm x 14mm w/ EP) |
Key Features
- High dynamic range with 14-bit resolution
- Sample rate of 1 GSPS, enabling multicarrier generation up to the Nyquist frequency
- Complex digital modulation and gain and offset compensation for direct conversion transmit applications
- Auxiliary DACs for controlling external VGA and offset
- Novel 2×, 4×, and 8× interpolator/coarse complex modulator for flexible carrier placement
- High performance, low noise PLL clock multiplier
- Digital inverse sinc filter
- Multiple chip synchronization interface
- Serial peripheral interface (SPI) for programming and readback of internal parameters
- Full-scale output current programmable over a range of 10 mA to 30 mA
Applications
- Wireless infrastructure: WCDMA, CDMA2000, TD-SCDMA, WiMax, GSM
- Digital high or low IF synthesis
- Internal digital upconversion capability
- Transmit diversity
- Wideband communications: LMDS/MMDS, point-to-point
Q & A
- What is the resolution of the AD9778BSVZRL DAC?
The AD9778BSVZRL has a resolution of 14 bits.
- What is the maximum sample rate of the AD9778BSVZRL?
The maximum sample rate is 1 GSPS.
- What are the typical operating supply voltages for the AD9778BSVZRL?
The typical operating supply voltages are 3.3 V for AVDD33 and DVDD33, and 1.8 V for DVDD18 and CVDD18.
- What is the power consumption in the 1× mode at 100 MSPS?
The power consumption in the 1× mode at 100 MSPS is typically 300 mW.
- What is the operating temperature range of the AD9778BSVZRL?
The operating temperature range is from -40°C to +85°C.
- What type of package does the AD9778BSVZRL come in?
The AD9778BSVZRL comes in a 100-lead TQFP package (14mm x 14mm w/ EP).
- Does the AD9778BSVZRL support multiple chip synchronization?
Yes, it includes a multiple chip synchronization interface.
- How can the full-scale output current be adjusted?
The full-scale output current can be programmed over a range of 10 mA to 30 mA.
- What are some of the key applications for the AD9778BSVZRL?
Key applications include wireless infrastructure, digital high or low IF synthesis, internal digital upconversion, transmit diversity, and wideband communications.
- Does the AD9778BSVZRL support complex digital modulation?
Yes, it includes features optimized for complex digital modulation.
