Overview
The AD9740ACPZ is a 10-bit resolution, wideband, third-generation member of the TxDAC series of high-performance, low-power CMOS digital-to-analog converters (DACs) from Analog Devices Inc. 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 high-speed applications. It features low power dissipation, with options to further reduce power consumption, and includes a power-down mode for low power idle periods.
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 Supply Voltage | 2.7 | 3.3 | 3.6 | V |
| Power Dissipation (typical) | 135 | mW | ||
| Standby Power Dissipation | 15 | mW | ||
| Package Type | 32-Lead LFCSP (5mm x 5mm) | |||
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, with options to reduce power further.
- 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.
- Power-down mode for low power idle periods, reducing standby power dissipation to approximately 15 mW.
- Industry-standard packages including 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP.
Applications
The AD9740 is specifically optimized for the transmit signal path of communication systems. It is suitable for a variety of high-speed applications, including:
- Wideband communication transmit channels.
- Portable and low-power applications due to its low power dissipation.
- High-speed data acquisition and signal processing systems.
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 up to 210 MSPS.
- What are the power supply voltage ranges for the AD9740?
The power supply voltage ranges from 2.7 V to 3.6 V.
- How much power does the AD9740 typically consume?
The typical power consumption is 135 mW.
- What is the standby power dissipation of the AD9740?
The standby power dissipation is approximately 15 mW.
- 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.
- Does the AD9740 support different data coding formats?
Yes, it supports both twos complement and straight binary data coding.
- What is the output settling time of the AD9740?
The output settling time (to 0.1%) is 11 ns.
- How does the AD9740 reduce spurious components and enhance dynamic performance?
The AD9740 uses a segmented current source architecture combined with a proprietary switching technique.
- What logic families do the digital inputs of the AD9740 support?
The digital inputs support 3 V CMOS logic families.
