Texas Instruments Intros 800 MSPS Dual-Channel DAC

Texas Instruments Incorporated (TI) has introduced a 16-bit, dual channel, 800 MSPS digital-to-analog converter (DAC). The device builds on the design of the DAC5687 and continues to push the space and performance boundaries in transmit DAC solutions for wireless base stations, software-defined radio applications and multi-frequency test equipment. The DAC5688 expands on TI’s portfolio of full-featured DACs and represents a 67 percent space reduction over the previous generation. Offered in a space-saving 64-pin 9 mm x 9 mm QFN package, the DAC5688 features enhanced performance to support existing 3G applications, including WCDMA and TD-SCDMA, and emerging 4G applications, including WiMAX and LTE. For instance, for an output frequency of 70 MHz, the device achieves 81 dBC ACLR for a single-carrier WCDMA application.



The DAC5688 dual CMOS data bus provides 250 Mbps input data transfer per DAC channel. Several input data options are available including dual-bus data, single-bus interleaved data, even and odd multiplexing at half-rate, and an input FIFO with either external or internal clock, which eases interface timing. Input data can be interpolated two, four or eight times by on-board digital interpolating FIR filters with greater than 80dB stop-band attenuation. The DAC5688 is available now in 64-pin quad flat no-lead (QFN) package and is priced at $29.95 in 1,000-piece quantities (suggested resale pricing).