Overview
The AD9742ACP, produced by Analog Devices Inc., is a 12-bit resolution, high-performance digital-to-analog converter (DAC) that is part of the TxDAC family. This family includes pin-compatible 8-, 10-, 12-, and 14-bit DACs, optimized for the transmit signal path of communication systems. The AD9742 offers exceptional AC and DC performance, supporting update rates up to 210 MSPS, making it suitable for high-speed applications. It is designed with low power dissipation, making it well-suited for portable and low-power applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | - | - | 12 bits | - |
| Update Rate | - | - | 210 MSPS | - |
| Power Supply | 2.7 V | - | 3.6 V | V |
| Power Dissipation | - | 135 mW | - | mW |
| Standby Power Dissipation | - | - | 15 mW | mW |
| Full-Scale Output Current | - | - | 20 mA | mA |
| Package Options | - | - | 28-lead SOIC, 28-lead TSSOP, 32-lead LFCSP | - |
Key Features
- High-speed, single-ended CMOS clock input supporting up to 210 MSPS conversion rate.
- Low power operation: Complete CMOS DAC function operates on 135 mW from a 2.7 V to 3.6 V single supply. Power dissipation can be reduced further by lowering the full-scale current output or using the sleep mode.
- On-chip voltage reference: 1.2 V temperature compensated band gap voltage reference.
- Segmented current source architecture combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance.
- Edge-triggered input latches and support for 3 V CMOS logic families.
- Industry-standard packages: 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP.
Applications
The AD9742 is specifically optimized for the transmit signal path of communication systems. It is suitable for various high-speed applications, including:
- Wireless communication systems
- Cable infrastructure
- Radar and military communication systems
- Portable and low-power applications
Q & A
- What is the resolution of the AD9742?
The AD9742 has a 12-bit resolution.
- What is the maximum update rate of the AD9742?
The AD9742 supports update rates up to 210 MSPS.
- What are the power supply options for the AD9742?
The AD9742 operates from a single supply of 2.7 V to 3.6 V.
- How much power does the AD9742 typically dissipate?
The AD9742 typically dissipates 135 mW of power.
- What is the standby power dissipation of the AD9742?
The standby power dissipation is approximately 15 mW.
- What types of packages are available for the AD9742?
The AD9742 is available in 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP packages.
- Does the AD9742 have an on-chip voltage reference?
Yes, the AD9742 includes a 1.2 V temperature compensated band gap voltage reference.
- What logic families are supported by the digital inputs of the AD9742?
The digital inputs support 3 V CMOS logic families.
- How can the power dissipation of the AD9742 be reduced?
The power dissipation can be reduced by lowering the full-scale current output or by using the sleep mode.
- What is the architecture of the current sources in the AD9742?
The AD9742 uses a segmented current source architecture combined with a proprietary switching technique.
