Overview
The AD9779BSVZ, produced by Analog Devices Inc., is a dual 16-bit, high dynamic range, digital-to-analog converter (DAC) designed for high-performance applications. It operates at a sample rate of 1 GSPS, enabling multicarrier generation up to the Nyquist frequency. This DAC 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 is available in a 100-lead TQFP package with an exposed pad.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | - | 16 | - | Bits |
| Integral Nonlinearity (INL) | -3.7 | - | 3.7 | LSB |
| Offset Error | -0.001 | 0 | 0.001 | % FSR |
| 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 |
| Digital Supply Voltages (DVDD18) | 1.70 | 1.8 | 1.90 | V |
| Power Consumption (1× Mode, fDAC = 100 MSPS) | 250 | 300 | - | mW |
| Package | - | 100-lead TQFP with exposed pad | - | - |
Key Features
- Dual 16-bit DAC with a sample rate of 1 GSPS
- High dynamic range, suitable for 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 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 from 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 AD9779BSVZ DAC?
The AD9779BSVZ is a dual 16-bit DAC.
- What is the sample rate of the AD9779BSVZ?
The sample rate is 1 GSPS.
- What type of package does the AD9779BSVZ come in?
The device is available in a 100-lead TQFP package with an exposed pad.
- What are the typical supply voltages for the AD9779BSVZ?
The analog supply voltage (AVDD33) is 3.3 V, and the digital supply voltage (DVDD18) is 1.8 V.
- What is the power consumption of the AD9779BSVZ in 1× mode at 100 MSPS?
The power consumption is typically 300 mW.
- Does the AD9779BSVZ support multiple chip synchronization?
Yes, it includes a multiple chip synchronization interface.
- What is the purpose of the auxiliary DACs in the AD9779BSVZ?
The auxiliary DACs allow control of external VGA and offset.
- Can the full-scale output current of the AD9779BSVZ be programmed?
Yes, the full-scale output current can be programmed from 10 mA to 30 mA.
- What types of modulation does the AD9779BSVZ support?
The device supports complex digital modulation and includes a novel interpolator/coarse complex modulator.
- What is the typical application area for the AD9779BSVZ?
The device is typically used in wireless infrastructure, digital IF synthesis, and wideband communications.
