Overview
The AD9779BSVZRL is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the AD9776/AD9778/AD9779 family and is designed to operate at a sample rate of 1 GSPS, enabling multicarrier generation up to the Nyquist frequency. It is optimized for direct conversion transmit applications, including complex digital modulation, and features gain and offset compensation. The device is manufactured on an advanced 0.18 μm CMOS process and operates on 1.8 V and 3.3 V supplies, with a total power consumption of 1.0 W. It is packaged in a 100-lead TQFP (Thin Quad Flat Package) with an exposed paddle.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | - | 16 | - | Bits |
| Sample Rate | - | 1 GSPS | - | - |
| Differential Nonlinearity (DNL) | - | ±2.1 | - | LSB |
| Integral Nonlinearity (INL) | - | ±3.7 | - | LSB |
| Main DAC Output Offset Error | -0.001 | 0 | +0.001 | % FSR |
| Main DAC Output Gain Error (with Internal Reference) | - | - | - | % 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 | - | mW |
| Package Type | - | 100-lead TQFP | - | - |
Key Features
- High dynamic range digital-to-analog conversion with 16-bit resolution.
- Sample rate of 1 GSPS, enabling multicarrier generation up to the Nyquist frequency.
- Optimized for direct conversion transmit applications, including complex digital modulation.
- Gain and offset compensation.
- Novel 2×, 4×, and 8× interpolator/coarse complex modulator for flexible carrier placement.
- Auxiliary DACs for control of external VGA and offset control.
- Multiple chip synchronization interface.
- High performance, low noise PLL clock multiplier.
- Digital inverse sinc filter.
- 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 AD9779BSVZRL DAC?
The AD9779BSVZRL has a resolution of 16 bits.
- What is the sample rate of the AD9779BSVZRL?
The sample rate is 1 GSPS.
- What are the typical supply voltages for the AD9779BSVZRL?
The typical supply voltages are 1.8 V and 3.3 V.
- What is the power consumption of the AD9779BSVZRL in 1× mode?
The power consumption in 1× mode is typically 300 mW.
- What type of package does the AD9779BSVZRL come in?
The device is packaged in a 100-lead TQFP with an exposed paddle.
- What are some of the key features optimized for direct conversion transmit applications?
Key features include complex digital modulation, gain and offset compensation, and auxiliary DACs for external VGA and offset control.
- 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 interface is used for programming and readback of internal parameters?
A serial peripheral interface (SPI) is used for programming and readback.
- What are some of the typical applications for the AD9779BSVZRL?
Typical applications include wireless infrastructure, digital high or low IF synthesis, internal digital upconversion, transmit diversity, and wideband communications.
- What is the operating temperature range for the AD9779BSVZRL?
The operating temperature range is not explicitly stated in the provided sources, but typical operating ranges for similar devices are usually between -40°C to 85°C.
