Overview
The AD9772A, produced by Analog Devices Inc., is a high-performance, single-supply, oversampling 14-bit digital-to-analog converter (DAC) designed for baseband or IF waveform reconstruction applications. It is optimized for exceptional dynamic range and is part of the SoftCell® chipset. The AD9772A integrates a complete 14-bit DAC with a 2× digital interpolation filter and a clock multiplier, making it suitable for a variety of high-speed signal processing tasks.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | - | - | 14 bits | - |
| Maximum DAC Output Update Rate (fDAC) | - | - | 400 MSPS | - |
| Output Settling Time (tST) (to 0.025%) | - | - | 11 ns | - |
| AVDD Voltage Range | 3.1 | 3.3 | 3.5 | V |
| Analog Supply Current (IAVDD) | 34 | 37 | - | mA |
| Digital Supply Current (IDVDD) | 37 | 40 | - | mA |
| Clock Supply Current (ICLKVDD + IPLLVDD) | 25 | 30 | - | mA |
| Operating Temperature Range | -40 | - | +85 | °C |
Key Features
- Integrated 2× digital interpolation filter with low-pass or high-pass response, providing up to 73 dB of image rejection.
- On-chip PLL clock multiplier generates all necessary high-speed clocks for the digital filter and DAC.
- Flexible differential clock input for single-ended or differential clock drivers, optimizing jitter performance.
- Low glitch, fast settling 14-bit DAC for exceptional dynamic range in baseband and direct IF applications.
- Supports input data rates up to 160 MSPS with edge-triggered latches and a flexible clock input.
- Configurable current output for various single-ended or differential circuit topologies.
Applications
The AD9772A is primarily used in baseband or IF waveform reconstruction applications, including:
- Wireless communication systems, such as base stations and transceivers.
- Radar and military communication systems.
- Test and measurement equipment requiring high dynamic range and precision.
- Medical imaging and diagnostic equipment.
Q & A
- What is the resolution of the AD9772A DAC?
The AD9772A has a resolution of 14 bits. - What is the maximum DAC output update rate of the AD9772A?
The maximum DAC output update rate is 400 MSPS. - What is the output settling time of the AD9772A?
The output settling time is 11 ns to 0.025%. - What is the voltage range for the AVDD supply?
The AVDD voltage range is from 3.1 V to 3.5 V. - What is the typical analog supply current of the AD9772A?
The typical analog supply current (IAVDD) is 37 mA. - Can the AD9772A support differential clock inputs?
Yes, the AD9772A supports flexible differential clock inputs for single-ended or differential clock drivers. - What is the purpose of the on-chip PLL clock multiplier?
The on-chip PLL clock multiplier generates all the necessary high-speed clocks for the digital filter and the DAC. - What are the primary applications of the AD9772A?
The primary applications include wireless communication systems, radar and military communication systems, test and measurement equipment, and medical imaging and diagnostic equipment. - How does the 2× digital interpolation filter enhance the performance of the AD9772A?
The 2× digital interpolation filter provides a low-pass response, reducing the complexity of the analog reconstruction filter and offering up to 73 dB of image rejection. - What is the operating temperature range of the AD9772A?
The operating temperature range is from -40°C to +85°C.
