Overview
The AD9767AST is a 14-bit, dual-channel, high-speed digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the TxDAC+® family and is optimized for high-performance applications, particularly in communications and data processing. The AD9767 integrates two high-quality DAC cores, a voltage reference, and digital interface circuitry into a compact 48-lead LQFP package. It supports update rates of up to 125 MSPS and is designed for processing I and Q data, making it ideal for applications requiring low distortion and high dynamic accuracy.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 14-bit | |||
| Update Rate | 125 | MSPS | ||
| Output Settling Time (to 0.1%) | 35 | ns | ||
| Output Propagation Delay | 1 | ns | ||
| Glitch Impulse | 5 | pV-s | ||
| Output Rise Time (10% to 90%) | 2.5 | ns | ||
| Output Fall Time (90% to 10%) | 2.5 | ns | ||
| Power Supply Voltage | 3.3 | 5.0 | V | |
| Power Consumption | 380 | mW | ||
| Operating Temperature | -40 | 85 | °C | |
| Package Type | 48-Lead LQFP | |||
Key Features
- Dual 14-bit, 125 MSPS DACs optimized for low distortion performance and flexible transmission of I and Q information.
- Excellent gain and offset matching: 0.1% gain matching and offset error better than 0.02%.
- Flexible dual-port interface allowing dual or interleaved input data.
- On-chip 1.20 V temperature-compensated bandgap voltage reference.
- Low power operation: 380 mW from a 3.3 V to 5.0 V single supply, with a sleep mode for low power idle periods.
- Segmented current source architecture combined with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy.
- Differential current output supporting single-ended or differential applications.
- Separate write inputs and clocks for independent control of each DAC port.
Applications
- Communications: Base stations, digital synthesis, and quadrature modulation.
- Digital signal processing and data acquisition systems.
- 3D ultrasound and other high-speed data conversion applications.
Q & A
- What is the resolution of the AD9767AST DAC?
The AD9767AST has a resolution of 14 bits.
- What is the maximum update rate of the AD9767AST?
The maximum update rate is 125 MSPS.
- What is the typical power consumption of the AD9767AST?
The typical power consumption is 380 mW from a 3.3 V to 5.0 V single supply.
- Does the AD9767AST have an on-chip voltage reference?
Yes, it includes a 1.20 V temperature-compensated bandgap voltage reference.
- What is the operating temperature range of the AD9767AST?
The operating temperature range is from -40°C to +85°C.
- Can the AD9767AST be used in differential applications?
Yes, it provides differential current output, supporting both single-ended and differential applications.
- How is the full-scale current of the AD9767AST controlled?
The full-scale current can be set from 2 mA to 20 mA via an external resistor connected to the Full Scale Adjust (FSADJ) pin.
- Does the AD9767AST support interleaved data input?
Yes, it allows dual or interleaved input data through its flexible dual-port interface.
- What is the package type of the AD9767AST?
The package type is a 48-lead LQFP.
- Is the AD9767AST optimized for specific applications?
Yes, it is optimized for processing I and Q data in communications applications.
