Overview
The AD9775BSVZRL is a 14-bit, high-performance, programmable 2×/4×/8× interpolating dual Transmit Digital-to-Analog Converter (TxDAC+) produced by Analog Devices Inc. This component is part of the AD977x family, known for its pin compatibility and advanced features. The AD9775 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, as well as systems employing high-order QAM modulation schemes.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 14 bits |
| Sample Rate | Up to 160 MSPS |
| Interpolation Factors | 2×, 4×, 8× |
| Differential Output | Yes |
| Integral Nonlinearity (INL) | 5 LSB |
| Interface | Parallel, SPI |
| Max Input Voltage | 1.25 V |
| Supply Voltage | 3.1 V to 3.5 V |
| Power Consumption | 1.2 W @ 3.3 V typical |
| Package | 80-Lead Thin Quad Flat Package (TQFP_EP) |
| Operating Temperature | −40°C to +85°C |
Key Features
- Dual high-performance DAC outputs with differential current output programmable over a 2 mA to 20 mA range.
- Selectable 2×/4×/8× interpolation filters to simplify reconstruction filter requirements and enhance pass-band noise/distortion performance.
- Direct IF transmission capability for frequencies above 70 MHz through a novel digital mixing process.
- Programmable channel gain and offset control, including 6 dB of gain adjustment range.
- Flexible clock interface accepting differential or single-ended sine wave or digital logic inputs, with an internal PLL clock multiplier and programmable divider.
- Flexible data input interface supporting straight binary or twos complement formats, and single-port interleaved or dual-port data.
- Excellent spurious-free dynamic range (SFDR) and low noise floor.
- Image rejection feature to simplify and reduce the number of signal band filters needed in the transmit signal chain.
Applications
- Communications systems: wideband CDMA, multicarrier CDMA, multicarrier TDMA, multicarrier GSM, 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 AD9775BSVZRL?
The AD9775BSVZRL has a resolution of 14 bits.
- What are the interpolation factors available on the AD9775BSVZRL?
The AD9775BSVZRL supports 2×, 4×, and 8× interpolation factors.
- What is the maximum sample rate of the AD9775BSVZRL?
The maximum sample rate is up to 160 MSPS.
- What type of output does the AD9775BSVZRL provide?
The AD9775BSVZRL provides differential current output programmable over a 2 mA to 20 mA range.
- What is the operating supply voltage range for the AD9775BSVZRL?
The operating supply voltage range is 3.1 V to 3.5 V.
- What is the typical power consumption of the AD9775BSVZRL?
The typical power consumption is 1.2 W @ 3.3 V.
- What package type is the AD9775BSVZRL available in?
The AD9775BSVZRL is available in an 80-Lead Thin Quad Flat Package (TQFP_EP).
- What are the key applications of the AD9775BSVZRL?
The key applications include communications systems, analog quadrature modulation architecture, broadband wireless, point-to-point microwave radios, and instrumentation/ATE.
- Does the AD9775BSVZRL support image rejection?
Yes, the AD9775BSVZRL supports image rejection, which helps simplify and reduce the number of signal band filters needed in the transmit signal chain.
- Can the AD9775BSVZRL perform direct IF transmission?
Yes, the AD9775BSVZRL can perform direct IF transmission for frequencies above 70 MHz through a novel digital mixing process.
