AD9142BCPZ

Overview

The AD9142BCPZ is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) from Analog Devices. It supports a maximum sample rate of 1600 MSPS, enabling multicarrier generation up to the Nyquist frequency. The device features a proprietary low spurious and distortion design, achieving an SFDR greater than 85 dBc at zero intermediate frequency with a 300 MHz bandwidth. Key specifications include a differential nonlinearity of ±2.1 LSB and integral nonlinearity of ±3.7 LSB. Power consumption is rated at 2.0 W at 1.6 GSPS and 1.7 W at 1.25 GSPS under full operating conditions.

Feature Summary

• Dual-channel architecture with 16-bit resolution and 1600 MSPS update rate
• On-chip numeric control oscillator for carrier placement anywhere in the DAC Nyquist bandwidth
• Selectable 2×, 4×, or 8× interpolation filters with fixed latency compensation
• Integrated high-performance, low-noise PLL clock multiplier

Applications

• Wireless communications: 3G/4G and MC-GSM base stations
• Wideband repeaters and software-defined radios
• Point-to-point and LMDS/MMDS wideband communications
• Transmit diversity and MIMO systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure compatibility with system voltage requirements, specifically AVDD33 at 3.3 V and DVDD18/CVDD18 at 1.8 V. Confirm that the 72-lead LFCSP footprint matches the PCB layout guidelines provided in the datasheet.

Selection Notes

Select this component for direct conversion transmit applications requiring complex digital modulation. The AD9142 is optimized for interfacing with analog quadrature modulators such as the ADL537x series. Designers should account for the flexible 16-bit LVDS interface and ensure proper termination for the DACCLK and REFCLK inputs to maintain signal integrity at high speeds.

Part Context

The AD9142 belongs to the TxDAC+ family of high-speed digital-to-analog converters. It is designed to replace older generations of DACs by offering improved power efficiency and lower inherent latency variation. The device simplifies multichip synchronization, making it suitable for multi-carrier synthesis in modern communication infrastructure.

Replacement Considerations

The AD9142A is a related variant within the same product family. Verify pinout and register compatibility if substituting between these models. No other direct cross-model replacements are confirmed in the provided documentation.