Overview
The AD9775BSV, produced by Analog Devices Inc., is a 14-bit, high-performance, programmable digital-to-analog converter (DAC) that is part of the AD977x family. This device is designed for wide dynamic range, multicarrier, and multistandard systems, making it ideal for applications such as wideband CDMA, multicarrier CDMA, multicarrier TDMA, and multicarrier GSM. The AD9775 features advanced interpolation and modulation capabilities, enhancing its suitability for high-performance communications systems.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 160 MSPS |
| Interpolation Factors | 2×, 4×, 8× |
| Digital Modulation | fS/2, fS/4, fS/8 |
| Supply Voltage | 3.1 V to 3.5 V |
| Power Consumption | 1.2 W |
| Package Type | 80-Lead TQFP (12mm x 12mm) |
| Data Interface | SPI, Straight Binary or Twos Complement |
| DAC Output Current Range | 2 mA to 20 mA |
| Clock Input | Differential or Single-Ended Sine Wave or Digital Logic Inputs |
Key Features
- Selectable 2×, 4×, 8× interpolation filters to simplify reconstruction filter requirements and enhance pass-band noise/distortion performance.
- Digital quadrature modulation and image rejection capabilities to reduce the need for signal band filters.
- Direct IF mode to eliminate costly mixer stages in communications systems.
- Programmable channel gain and offset control for calibration and error correction.
- Flexible clock interface with internal PLL clock multiplier and programmable divider.
- Support for single-port or dual-port data interfaces in straight binary or twos complement formats.
- Dual high-performance DAC outputs with programmable differential current output.
- On-chip 1.2 V temperature-compensated band gap voltage reference.
- Low power operation with several sleep functions to reduce power during idle periods.
Applications
- Communications systems: 3G, multicarrier GSM, TDMA, CDMA, and high-performance systems employing high-order QAM modulation schemes.
- Analog quadrature modulation architecture.
- Broadband wireless and point-to-point microwave radios.
- Instrumentation and Automated Test Equipment (ATE).
Q & A
- What is the resolution of the AD9775?
The AD9775 has a resolution of 14 bits.
- What are the interpolation factors available on the AD9775?
The AD9775 supports 2×, 4×, and 8× interpolation factors.
- What is the maximum sampling rate of the AD9775?
The maximum sampling rate of the AD9775 is 160 MSPS.
- What types of digital modulation does the AD9775 support?
The AD9775 supports fS/2, fS/4, and fS/8 digital quadrature modulation.
- What is the supply voltage range for the AD9775?
The AD9775 operates from a single supply of 3.1 V to 3.5 V.
- How much power does the AD9775 consume?
The AD9775 consumes 1.2 W of power.
- What is the package type of the AD9775?
The AD9775 comes in an 80-Lead TQFP (12mm x 12mm) package.
- What data interface options are available on the AD9775?
The AD9775 supports SPI, straight binary, or twos complement data interfaces.
- What is the range of the DAC output current on the AD9775?
The DAC output current on the AD9775 is programmable over a range of 2 mA to 20 mA.
- What types of clock inputs are supported by the AD9775?
The AD9775 supports differential or single-ended sine wave or digital logic inputs for the clock.
