AD9861-80

• Product Introduction

The AD9861 is a member of the MxFE ® family of integrated converters for the communications market. The AD9861 includes dual 10-bit analog-to-digital converters (ADCs) and dual 10-bit digital-to-analog converters (TxDAC ® converters). In the case of two speed classes, one -50 -80. -50 is optimized for 50 MSPS and reduced sampling ADC, while -80 ADC has a sampling rate of 50 MSPS and optimized, 80 MSPS. The TxDAC converter operates at dual speeds up to 200 MHz and includes a bypassable 2x or 4x interpolation filter. Three auxiliary converters can also provide the required system-level control voltage or monitoring system signal. All devices are optimized for low power consumption, small size, and cost-effective solutions for the broadband communications market. The AD9861 uses a single input clock pin (CLKIN) to generate all system clocks. The ADC and TxDAC convert clocks to generate a generation block in time, utilizing user-programmable options such as gap circuits, PLL multipliers, and switches. A flexible bidirectional 20-bit I/O bus is used to accommodate custom digital backends or open market DSPs. In a half-duplex system, the interface supports 20-bit parallel transmission or 10-bit interleaved transmission. In a full-duplex system, the interface supports a staggered 10-bit ADC bus as well as an interleaved 10-bit transmit bus. The flexible I/O bus reduces the number of pins, so the package size is required. The AD9861 can be used to configure the interface bus with either mode pins or serial programmable interface (SPI), configure the TxDAC series converter insertion rate, and control the ADC's power off and TxDAC series power-off. Allows more SPI programmable options for both the TxDAC path (e.g., thick gain control, channel matching offset control) and the ADC path (e.g., internal duty cycle stability, 2 complement data format). The AD9861 is available in a 64-pin LFCSP package (low-profile, fine-pitch chip-level package). The 64-pin LFCSP package area is only 9 mm, 9 mm, and less than 0.9 mm for high fitting applications such as PCMCIA clamp spacing. Applications Broadband Access Broadband LAN Communications (Modems)