Overview
The AD9744ACP from Analog Devices Inc. is a high-performance, 14-bit digital-to-analog converter (DAC) that is part of the TxDAC family. This device is optimized for the transmit signal path in communication systems and offers exceptional AC and DC performance. It supports update rates up to 210 MSPS, making it suitable for wideband communication applications. The AD9744ACP features a segmented current source architecture combined with a proprietary switching technique to enhance dynamic performance and reduce spurious components. It also includes edge-triggered input latches and a 1.2 V temperature-compensated band gap reference for a complete monolithic DAC solution.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 bits | |||
| Maximum Output Update Rate (fCLOCK) | 210 MSPS | |||
| Output Settling Time (tST) (to 0.1%) | 11 ns | ns | ||
| Differential Current Outputs | 2 mA | 20 mA | mA | |
| Power Dissipation at 3.3 V | 135 mW | mW | ||
| Power-Down Mode at 3.3 V | 15 mW | mW | ||
| On-Chip Reference Voltage | 1.2 V | V | ||
| Package Type | 28-Lead SOIC, 28-Lead TSSOP, 32-Lead LFCSP | |||
| Supply Voltage Range | 2.7 V | 3.6 V | V | |
Key Features
- High-performance member of the pin-compatible TxDAC product family
- Excellent SFDR (Spurious-Free Dynamic Range) performance
- Supports twos complement or straight binary data format
- Differential current outputs: 2 mA to 20 mA
- Low power dissipation: 135 mW at 3.3 V, with power-down mode at 15 mW
- On-chip 1.2 V temperature-compensated band gap reference
- CMOS-compatible digital interface
- Edge-triggered input latches
- Segmented current source architecture with proprietary switching technique
Applications
- Wideband communication transmit channels
- Direct IF (Intermediate Frequency) stages
- Base stations
- Wireless local loops
- Digital radio links
- Direct digital synthesis (DDS)
- Instrumentation
Q & A
- What is the resolution of the AD9744ACP?
The AD9744ACP has a resolution of 14 bits.
- What is the maximum output update rate of the AD9744ACP?
The maximum output update rate is up to 210 MSPS.
- What are the differential current output ranges of the AD9744ACP?
The differential current outputs range from 2 mA to 20 mA.
- How much power does the AD9744ACP dissipate at 3.3 V?
The power dissipation is 135 mW at 3.3 V, and it reduces to 15 mW in power-down mode.
- What type of digital interface does the AD9744ACP support?
The AD9744ACP supports a CMOS-compatible digital interface.
- What is the on-chip reference voltage of the AD9744ACP?
The on-chip reference voltage is 1.2 V.
- What are the available package types for the AD9744ACP?
The available package types are 28-Lead SOIC, 28-Lead TSSOP, and 32-Lead LFCSP.
- What is the supply voltage range for the AD9744ACP?
The supply voltage range is from 2.7 V to 3.6 V.
- What are some common applications of the AD9744ACP?
Common applications include wideband communication transmit channels, direct IF stages, base stations, wireless local loops, digital radio links, direct digital synthesis (DDS), and instrumentation.
- How does the power-down mode affect the AD9744ACP?
The power-down mode reduces the standby power dissipation to approximately 15 mW and allows the device to power down in less than 50 ns and power back up in approximately 5 μs.
