Product Details
●The AD9142 is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a sample rate of 1600 MSPS, permitting a multicarrier generation up to the Nyquist frequency. The AD9142 TxDAC+® includes features optimized for direct conversion transmit applications, including complex digital mod-ulation, input signal power detection, and gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL537x F-MOD series and the ADRF670x series from Analog Devices, Inc. A 3-wire serial port interface provides for the pro-gramming/readback of many internal parameters. Full-scale output current can be programmed over a range of 9 mA to 33 mA. The AD9142 is available in a 72-lead LFCSP.
●PRODUCT HIGHLIGHTS
● 1. Advanced low spurious and distortion design techniques provide high quality synthesis of wideband signals from baseband to high intermediate frequencies.
● 2. Very small inherent latency variation simplifies both software and hardware design in the system. It allows easy multichip synchronization for most applications.
● 3. New low power architecture improves power efficiency (mW/MHz/channel) by 30%.
● 4. Input signal power and FIFO error detection simplify designs for downstream analog circuitry protection.
● 5. Programmable transmit enable function allows easy design balance between power consumption and wakeup time.
●APPLICATIONS
● Wireless communications: 3G/4G and MC-GSM base stations,
●wideband repeaters, software defined radios
● Wideband communications: point-to-point, LMDS/MMDS
● Transmit diversity/MIMO
● Instrumentation
● Automated test equipment
●### Features and Benefits
● Very small inherent latency variation: <2 DAC clock cycles
● Proprietary low spurious and distortion design
●6-carrier GSM ACLR = 79 dBc at 200 MHz IF
●SFDR > 85 dBc (bandwidth = 300 MHz) at ZIF
● Flexible 16-bit LVDS interface
●Supports word and byte load
● Multiple chip synchronization
●Fixed latency and data generator latency compensation
● Selectable 2×, 4×, 8× interpolation filter
●Low power architecture
●fS/4 power saving coarse mixer
● Input signal power detection
●Emergency stop for downstream analog circuitry protection
● FIFO error detection
● See data sheet for additional features
