Overview
The AD9740ACPZRL7, 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 offers exceptional AC and DC performance. It supports update rates up to 210 MSPS, making it suitable 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 Supply Range | 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. Power dissipation can be further reduced to 60 mW with a slight degradation in performance by lowering the full-scale current output.
- 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.
- Power-down mode reduces standby power dissipation to approximately 15 mW.
Applications
The AD9740ACPZRL7 is specifically optimized for the transmit signal path of communication systems. It is suitable for a wide range of applications, including:
- Wideband communication systems
- Data acquisition systems
- Medical equipment
- Portable and low-power applications
Q & A
- What is the resolution of the AD9740ACPZRL7?
The AD9740ACPZRL7 has a 10-bit resolution.
- What is the maximum output update rate of the AD9740ACPZRL7?
The maximum output update rate is up to 210 MSPS.
- What is the typical power dissipation of the AD9740ACPZRL7?
The typical power dissipation is 135 mW from a 2.7 V to 3.6 V single supply.
- How can the power dissipation be reduced?
Power dissipation can be further reduced to 60 mW by lowering the full-scale current output, and a power-down mode reduces the standby power dissipation to approximately 15 mW.
- What type of voltage reference does the AD9740ACPZRL7 include?
The AD9740ACPZRL7 includes a 1.2 V temperature-compensated band gap voltage reference.
- What are the supported logic families for the digital inputs?
The digital inputs support 3 V CMOS logic families.
- What is the package type of the AD9740ACPZRL7?
The package type is a 32-Lead LFCSP (5mm x 5mm).
- What are some common applications for the AD9740ACPZRL7?
Common applications include wideband communication systems, data acquisition systems, medical equipment, and portable and low-power applications.
- How does the segmented current source architecture enhance performance?
The segmented current source architecture combined with a proprietary switching technique reduces spurious components and enhances dynamic performance.
- Can the full-scale output current be adjusted?
Yes, the full-scale output current can be set from 2 mA to 20 mA via an external resistor connected to the full-scale adjust (FS ADJ) pin).
