Overview
The AD9740ARURL7, 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. It offers exceptional AC and DC performance, supporting update rates up to 210 MSPS, making it well-suited for high-speed applications. The AD9740 is part of a pin-compatible family that includes 8-, 10-, 12-, and 14-bit DACs, allowing for flexible component selection based on performance, resolution, and cost.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 10 Bits | |||
| 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 | 135 mW (typical) | |||
| Power Supply Range | 2.7 | 3.3 | 3.6 | V |
| Full-Scale Output Current | 2 | 20 | mA | |
| Output Compliance Range | -1 | 1.25 | V | |
| Output Resistance | 100 kΩ | |||
| Output Capacitance | 5 pF | |||
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 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.
- Data input supports twos complement or straight binary data coding.
Applications
The AD9740 is optimized for the transmit signal path of communication systems, making it suitable for a variety of high-speed communication applications, including:
- Wireless communication systems.
- Cable infrastructure.
- Radar and military communication systems.
- Portable and low-power applications where high-speed DAC performance is required.
Q & A
- What is the resolution of the AD9740?
The AD9740 has a 10-bit resolution.
- What is the maximum output update rate of the AD9740?
The maximum output update rate is 210 MSPS.
- What is the typical power dissipation of the AD9740?
The typical power dissipation is 135 mW.
- What are the supported data coding formats for the AD9740?
The AD9740 supports twos complement or straight binary data coding.
- What types of packages are available for the AD9740?
The AD9740 is available in 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP packages.
- How can the power dissipation of the AD9740 be reduced?
The power dissipation can be reduced by lowering the full-scale current output or using the sleep mode.
- What is the voltage range of the power supply for the AD9740?
The power supply range is from 2.7 V to 3.6 V.
- Does the AD9740 have an on-chip voltage reference?
Yes, the AD9740 includes a 1.2 V temperature-compensated band gap voltage reference.
- What is the output compliance range of the AD9740?
The output compliance range is from -1 V to 1.25 V.
- What logic families are supported by the digital inputs of the AD9740?
The digital inputs support 3 V CMOS logic families.
