NXP DAC1008D750双路750MSPS数模转换方案
NXP公司的DAC1008D750是集成了JESD204A接口的双路10位750MSPS数模转换器,可选择2/4/8内插滤波器以优化多载波WCDMA发送器,IMD3为80 dBc, fs = 737.28 Msps而fo = 140 MHz,最大速率为750MSPS,双载波WCDMA的ACPR为64dBc,主要用在无线基础架构如LTE, WiMAX, GSM, CDMA, WCDMA, TD-SCDMA;LMDS/MIMO和点对点通信,直接数字合成(DDS),宽带无线系统,数字无线链路以及自动测试设备(ATE)和仪表.本文介绍了DAC1008D750主要特性和优势,方框图以及ESD204A接收器, 主从模式框图和全从模式框图.
DAC1008D750:Dual 10-bit DAC; up to 750 Msps; 2,4 or 8 interpolating with JESD204A interface
The DAC1008D750 is a high-speed 10-bit dual channel Digital-to-Analog Converter
(DAC) with selectable 2,4or 8 interpolating filters optimized for multi-carrier WCDMA transmitters.
Because of its digital on-chip modulation, the DAC1008D750 allows the complex pattern provided through lane 0, lane 1, lane 2 and lane 3, to be converted up from baseband to IF. The mixing frequency is adjusted via a Serial Peripheral Interface (SPI) with a 32-bit Numerically Controlled Oscillator (NCO) and the phase is controlled by a 16-bit register.
The DAC1008D750 also includes a 2,4or 8 clock multiplier which provides the appropriate internal clocks and an internal regulation to adjust the output full-scale current.
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