Overview
The AD9746BCPZ is a high-performance, dual 14-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the AD9743/AD9745/AD9746/AD9747 family, which are pin-compatible and offer various resolutions and sample rates. The AD9746 is specifically designed for direct conversion transmit applications, featuring a dynamic output architecture that allows for analog output synthesis even beyond the Nyquist frequency. It is ideal for applications requiring high dynamic range and low noise, making it suitable for wireless infrastructure, wideband communications, and RF signal generation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 bits | |||
| Sample Rate | Up to 250 MSPS | |||
| DAC Clock Input Differential Peak-to-Peak Voltage | 400 | 800 | 1600 | mV |
| DAC Clock Input Single-Ended Peak-to-Peak Voltage | 800 | mV | ||
| DAC Clock Input Common-Mode Voltage | 300 | 400 | 500 | mV |
| Input Current (CLKP, CLKN) | 1 μA | |||
| Input Frequency | 250 MHz | |||
| Data to DAC Clock Setup Time (tDBS Dual-Port Mode) | 400 | ps | ||
| Data to DAC Clock Hold Time (tDBH Dual-Port Mode) | 1200 | ps | ||
| Power Dissipation | 315 mW | |||
| Package Type | 72-Lead LFCSP (10mm x 10mm w/ EP) | |||
Key Features
- Innovative switching output stage allowing useable outputs beyond the Nyquist frequency
- LVCMOS inputs with dual-port or optional interleaved single-port operation
- Differential analog current outputs programmable from 8.6 mA to 31.7 mA full-scale
- Auxiliary 10-bit current DACs with source/sink capability for external offset nulling
- Internal 1.2 V precision reference voltage source
- Operates from 1.8 V and 3.3 V supplies
- Small footprint, RoHS-compliant
- Serial peripheral interface (SPI) port for full programmability
- Pin-programmable features for applications without a controller
Applications
- Wireless infrastructure: W-CDMA, CDMA2000, TD-SCDMA, WiMAX
- Wideband communications: LMDS/MMDS, point-to-point
- Instrumentation
- Radio frequency (RF) signal generators, arbitrary waveform generators
Q & A
- What is the resolution of the AD9746BCPZ DAC?
The AD9746BCPZ has a resolution of 14 bits.
- What is the maximum sample rate of the AD9746BCPZ?
The maximum sample rate is up to 250 MSPS.
- What type of package does the AD9746BCPZ come in?
The AD9746BCPZ comes in a 72-Lead LFCSP (10mm x 10mm w/ EP) package.
- What are the operating supply voltages for the AD9746BCPZ?
The device operates from 1.8 V and 3.3 V supplies.
- Does the AD9746BCPZ support SPI programming?
- What are some of the key applications for the AD9746BCPZ?
Key applications include wireless infrastructure, wideband communications, instrumentation, and RF signal generators.
- How much power does the AD9746BCPZ dissipate?
The power dissipation is 315 mW.
- Is the AD9746BCPZ RoHS-compliant?
- What is the common-mode voltage range for the DAC clock input?
The common-mode voltage range is from 300 mV to 500 mV.
- Can the analog current outputs be programmed?
