Overview
The AD9745BCPZRL, produced by Analog Devices Inc., is a high dynamic range, dual digital-to-analog converter (DAC) with a 12-bit resolution and a sample rate of up to 250 MSPS. This device is part of the AD9743/AD9745/AD9746/AD9747 family, which are pin-compatible and designed for various high-performance applications. The AD9745 features a proprietary dynamic output architecture that allows for the synthesis of analog outputs even beyond the Nyquist frequency by shifting energy away from the fundamental and into the image frequency. It is particularly suited for direct conversion transmit applications and interfaces seamlessly with analog quadrature modulators such as the ADL5370.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | Bits | ||
| Differential Nonlinearity (DNL) | ±0.13 | LSB | ||
| Integral Nonlinearity (INL) | ±0.25 | LSB | ||
| Offset Error | ±0.001 | %FSR | ||
| Gain Error | ±2.0 | %FSR | ||
| Full-Scale Output Current | 8.6 | 31.7 | mA | |
| Output Compliance Voltage | -1.0 | +1.0 | V | |
| Output Resistance | 10 | MΩ | ||
| Sample Rate | 250 | MSPS | ||
| Power Dissipation | 315 | mW | ||
| Supply Voltage | 1.8 V, 3.3 V | V |
Key Features
- Proprietary dynamic output architecture allowing for analog outputs beyond Nyquist frequency.
- High dynamic range with 12-bit resolution.
- Sample rates up to 250 MSPS.
- Dual DACs with differential analog current outputs programmable from 8.6 mA to 31.7 mA full-scale.
- Auxiliary 10-bit current DACs for external offset nulling.
- Internal 1.2 V precision reference voltage source.
- LVCMOS inputs with dual-port or optional interleaved single-port operation.
- 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 and arbitrary waveform generators.
Q & A
- What is the resolution of the AD9745BCPZRL?
The AD9745BCPZRL has a 12-bit resolution. - What is the maximum sample rate of the AD9745BCPZRL?
The maximum sample rate is up to 250 MSPS. - What are the supply voltage options for the AD9745BCPZRL?
The device operates from 1.8 V and 3.3 V supplies. - What is the power dissipation of the AD9745BCPZRL?
The power dissipation is approximately 315 mW. - What type of output does the AD9745BCPZRL provide?
The device provides differential analog current outputs. - Can the AD9745BCPZRL be used in direct conversion transmit applications?
Yes, it is specifically designed for direct conversion transmit applications with features like gain and offset compensation. - How does the AD9745BCPZRL interface with other components?
It interfaces seamlessly with analog quadrature modulators such as the ADL5370. - What is the package type of the AD9745BCPZRL?
The device comes in a 72-lead LFCSP package. - Is the AD9745BCPZRL RoHS-compliant?
Yes, it is RoHS-compliant. - What is the purpose of the auxiliary 10-bit current DACs in the AD9745BCPZRL?
The auxiliary 10-bit current DACs are used for external offset nulling.
