Overview
The AD9763AST, produced by Analog Devices Inc., is a high-speed, dual-port, 2-channel digital-to-analog converter (DAC). This component integrates two high-quality TxDAC+® cores, a voltage reference, and digital interface circuitry into a compact 48-lead LQFP package. The AD9763AST is part of a family that includes 10-, 12-, and 14-bit resolutions, with the AD9763 specifically offering 10-bit resolution. It is optimized for processing I and Q data in communications applications and supports update rates of up to 125 MSPS, making it suitable for demanding high-speed applications.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 10-bit |
| Update Rate | Up to 125 MSPS |
| Supply Voltage | 3.3 V to 5 V |
| Power Consumption | 380 mW @ 5 V |
| Power-Down Mode | 50 mW @ 5 V |
| Full-Scale Current | Nominal 20 mA |
| Full-Scale Current Matching | Within 0.1% |
| Gain and Offset Matching | Gain: 0.1% of full scale, Offset: Better than 0.02% |
| Package Type | 48-lead LQFP (7mm x 7mm) |
Key Features
- Dual-port or interleaved data interface, allowing for flexible data input configurations.
- On-chip 1.2 V temperature-compensated band gap voltage reference.
- Segmented current source architecture combined with a 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.
- Gain control via external resistors, allowing for independent or single-resistor gain setting.
- Low power operation with a sleep mode for reduced power consumption during idle periods.
Applications
- Communications: Base stations, digital synthesis, and quadrature modulation.
- 3D ultrasound systems.
- Other high-speed digital-to-analog conversion applications requiring low distortion and high accuracy.
Q & A
- What is the resolution of the AD9763AST?
The AD9763AST has a resolution of 10 bits.
- What is the maximum update rate of the AD9763AST?
The AD9763AST supports update rates of up to 125 MSPS.
- What is the supply voltage range for the AD9763AST?
The AD9763AST operates from a single supply of 3.3 V to 5 V.
- How much power does the AD9763AST consume?
The AD9763AST consumes 380 mW of power at 5 V and 50 mW in power-down mode.
- What is the full-scale current of the AD9763AST?
The nominal full-scale current of the AD9763AST is 20 mA.
- How are the full-scale currents of the two DACs matched?
The full-scale currents between each DAC are matched to within 0.1%.
- What type of package does the AD9763AST come in?
The AD9763AST comes in a 48-lead LQFP (7mm x 7mm) package.
- What are the key applications of the AD9763AST?
The AD9763AST is optimized for communications applications, 3D ultrasound systems, and other high-speed digital-to-analog conversion applications.
- How does the gain control work on the AD9763AST?
The gain control can be set independently using two external resistors or collectively using a single external resistor.
- Does the AD9763AST have an on-chip voltage reference?
Yes, the AD9763AST includes a 1.2 V temperature-compensated band gap voltage reference.
