Overview
The AD9740ARZ, produced by Analog Devices Inc., is a 10-bit resolution, wideband, third-generation member of the TxDAC series of high-performance, low-power CMOS digital-to-analog converters (DACs). This device is specifically optimized for the transmit signal path of communication systems and is part of a pin-compatible family that includes 8-, 10-, 12-, and 14-bit DACs. The AD9740 offers exceptional AC and DC performance, supporting update rates up to 210 MSPS, making it well-suited for portable and low-power applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Maximum Output Update Rate (fCLOCK) | - | - | 210 | MSPS |
| Output Settling Time (tST) (to 0.1%) | - | - | 11 | ns |
| Output Propagation Delay (tPD) | - | - | 1 | ns |
| Glitch Impulse | - | - | 5 | pV-s |
| Output Rise Time (10% to 90%) | - | - | 2.5 | ns |
| Output Fall Time (10% to 90%) | - | - | 2.5 | ns |
| Output Noise (IOUTFS = 20 mA) | - | - | 50 | pA/√Hz |
| Power Dissipation (Typical) | - | - | 60 | mW |
| Standby Power Dissipation | - | - | 15 | mW |
| Supply Voltage Range | 2.7 | - | 3.6 | V |
Key Features
- Segmented current source architecture combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance.
- Edge-triggered input latches and a 1.2 V temperature-compensated band gap reference for a complete monolithic DAC solution.
- Digital inputs support 3 V CMOS logic families.
- Low power dissipation, with the ability to reduce power further to 60 mW by lowering the full-scale current output.
- Power-down mode reduces standby power dissipation to approximately 15 mW.
- Available in various packages including 28-Lead SOIC, 28-Lead TSSOP, and 32-Lead LFCSP.
Applications
The AD9740 is specifically designed for the transmit signal path of communication systems, making it ideal for applications such as wireless communication systems, radar systems, and other high-speed data transmission environments. Its low power consumption and high performance also make it suitable for portable and battery-powered devices.
Q & A
- What is the maximum output update rate of the AD9740?
The maximum output update rate of the AD9740 is up to 210 MSPS. - What is the typical output settling time of the AD9740?
The typical output settling time (to 0.1%) is 11 ns. - What is the power dissipation of the AD9740 in typical operation?
The typical power dissipation is around 60 mW, which can be further reduced. - Does the AD9740 have a power-down mode?
Yes, the AD9740 has a power-down mode that reduces the standby power dissipation to approximately 15 mW. - What are the supported supply voltage ranges for the AD9740?
The AD9740 can operate over a supply voltage range of 2.7 V to 3.6 V. - What type of logic does the AD9740 support for digital inputs?
The AD9740 supports 3 V CMOS logic families for digital inputs. - What is the architecture of the current sources in the AD9740?
The AD9740 uses a segmented current source architecture combined with a proprietary switching technique. - In what packages is the AD9740 available?
The AD9740 is available in 28-Lead SOIC, 28-Lead TSSOP, and 32-Lead LFCSP packages. - What are the typical applications of the AD9740?
The AD9740 is typically used in wireless communication systems, radar systems, and other high-speed data transmission environments. - How does the AD9740 manage spurious components and dynamic performance?
The AD9740 uses a segmented current source architecture and a proprietary switching technique to reduce spurious components and enhance dynamic performance.
