Norwood, Mass. - Analog Devices, Inc. has released a highly integrated quad-channel, 2.4-GSPS, 16-bit D/A converter. Touted as the only device of its kind to include an on-chip PLL (phase-locked loop) and eight-lane JESD204B interface, as well as an industry leading dynamic range performance in the 100- to 300-MHz band for complex IF transmitters, the AD9154 device allows designers to use a single device to meet all of their requirements in multi-carrier GSM and LTE transmitters designed for wireless macro base stations, point-to-point microwave radio, military radios and radio test equipment. The new converter offers a variety of features optimized for complex IF (intermediate frequency) transmit applications, including complex digital modulation, input-signal power detection, and gain, phase and offset compensation.
The AD9154, designed with an eight-lane JESD204B interface, is designed to up-convert a pair of I/Q digital input signals, creating a complex IF signal at the input to a pair of on-chip D/A converter cores, said ADI. The device features several interpolation modes, increasing the sampling rate of the digital signal to the Nyquist frequency to enable simpler and less costly transmitter filters following the D/A converter analog output, according to the company. The AD9154 also includes digital-signal correction for quadrature modulator up-converters to cancel RF (radio frequency) local oscillator feed-through and unwanted side-bands.
- Single-carrier LTE 20-MHz bandwidth ACLR = 76.7 dBC at 180-MHz IF
- Six-carrier GSM IMD = 78-dBC, 600-kHz carrier spacing at 180-MHz IF
- SFDR = 72-dBC at 180-MHz IF, -6 dBFS
- 8-lane JESD204B interface
- Support for quad-DAC or dual-DAC mode
- Low power: 2.1-W at 1.5 GSPS
The AD9154 quad, 16-bit D/A converters extends ADI’s transmit capabilities to the 100- to 300-MHz range, and joins the AD9144 quad, 16-bit D/A converter, which operates in the DC to 100-MHz range. ADI plans to introduce a 16-bit dual-channel D/A converter later in 2015.
Availability: The AD9154BCPZ (12x12mm, 88-lead LFCSP), AD9154-EBZ evaluation board, AD9154-FMC-EBZ evaluation board w/ FMC, and AD9154-M6720-EBZ evaluation board w/ 6720 Mod are all available now. Samples can be ordered here.
- EngineerZone, ADI’s online technical support community: https://ez.analog.com/community/data_converters/high-speed_dacs