Overview
The AD9765ASTZ, produced by Analog Devices Inc., is a 12-bit, high-speed, dual-port, 2-channel CMOS 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. It is optimized for processing I and Q data in communications applications, offering exceptional AC and DC performance with update rates up to 125 MSPS.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Update Rate | Up to 125 MSPS | |
| Number of Channels | 2 | |
| Supply Voltage | 3.3 V to 5 V | |
| Power Consumption | 380 mW @ 5 V | |
| Output Settling Time | 35 ns to 0.1% | ns |
| Output Propagation Delay | 1 ns | ns |
| Full-Scale Current | 20 mA (nominal) | mA |
| Gain Matching | 0.1% of full scale | |
| Offset Error | Better than 0.02% | |
| Package Type | 48-lead LQFP |
Key Features
- Dual-port or interleaved data interface, allowing flexible data input configurations.
- Separate write inputs and clocks for independent control of each DAC port.
- On-chip 1.2 V temperature-compensated band gap voltage reference.
- Segmented current source architecture with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy.
- Differential current output supporting single-ended or differential applications.
- Full-scale current can be set independently or using a single external resistor.
- Low power operation with a sleep mode consuming 50 mW @ 5 V.
Applications
- Communications: Base stations, digital synthesis, and quadrature modulation.
- 3D ultrasound systems.
- Any application requiring high-speed, high-accuracy DACs for processing I and Q data.
Q & A
- What is the resolution of the AD9765ASTZ DAC?
The AD9765ASTZ has a 12-bit resolution.
- What is the maximum update rate of the AD9765ASTZ?
The maximum update rate is up to 125 MSPS.
- How many channels does the AD9765ASTZ have?
The AD9765ASTZ has 2 channels.
- What is the supply voltage range for the AD9765ASTZ?
The supply voltage range is from 3.3 V to 5 V.
- What is the power consumption of the AD9765ASTZ at 5 V?
The power consumption is 380 mW at 5 V.
- How does the AD9765ASTZ handle I and Q data?
The AD9765ASTZ is optimized for processing I and Q data and can handle it through separate or interleaved data ports.
- What is the full-scale current of the AD9765ASTZ?
The nominal full-scale current is 20 mA.
- How is the gain of the AD9765ASTZ controlled?
The gain can be controlled using either two external resistors for independent setting or a single external resistor for both DACs.
- What is the package type of the AD9765ASTZ?
The package type is a 48-lead LQFP.
- Does the AD9765ASTZ have a sleep mode for low power operation?
