AD9863 12-Bit Mixed-Signal Front-End (MxFE® )Processor For Broadband Applications

The AD9863 is a member of the MxFE® family, a group of integrated converters for the communications market. The AD9863 includes dual 12-bit Analog-to-Digital Converters (ADCs) and dual 12-bit Digital to Analog Converters (TxDAC® converters). A -50 speed grade is available. The -50 is optimized for ADC sampling of 50 MSPS and less. The dual TxDAC converters operate at speeds up to 200 MHz and includes a bypassable 2x or 4x interpolation filter. All devices are optimized for low power, small form factor and provide a cost effective solution for the broadband communication market.

The AD9863 utilizes two independent input clocks input for controlling all system clocks. The ADC sampling rate is controlled by the CLKIN1 input. The DAC sampling rate is controlled by the CLKIN2 input and a Phase-Lock-Loop clock multiplier.

A Flexible bi-directional 24-bit I/O bus is used to accommodate a variety of custom digital back ends or open market DSPs. In half duplex systems, the interface supports 24-bit parallel transfers or 12-bit interleaved transfers. In Full duplex systems, the interface supports an interleaved 12-bit ADC bus and an interleaved 12-bit Tx bus. The Flexible I/O bus reduces pin count and therefore required package size.

The AD9863 can use either mode pins or a serial programmable interface (SPI) to configure the interface bus, operate the ADC in a low power mode, configure the TxDAC converter interpolation rate, control the ADC power down and TxDAC converter power down. The SPI allows for more programmable options for both the TxDAC path (for example, coarse and fine gain control, offset control for channel matching) and ADC path (for example, internal duty cycle stabilizer, 2's complement data format).

The AD9863 is packaged in a 64-pin lfCSP package (low profile, fine pitch chip scale package). The 64-pin lfCSP package footprint is only 9 mm by 9 mm and is less than 0.9 mm high fitting into tightly spaced applications such as PCMCIA cards.

Applications

Broadband Access
Broadband LAN
Communications (Modems)

Features and Benefits

Receive Path Includes Dual 12-Bit Analog-To-Digital Converters with Internal or External Reference, 50 MSPS Version
Transmit Path Includes Dual 12-Bit, 200 MSPS Digital-To-Analog Converters with 1x, 2x, or 4x Interpolation and Programmable Gain Control
Internal Clock Distribution Block Includes a Programmable Phase-Locked Loop and Timing Generation Circuitry Allowing Single or Dual Reference Clock Operation

24 Bit Flexible I/O Data Interface Allow Various Interleaved or Non-Interleaved Data Transfers in Half-Duplex Mode and Interleaved Data Transfers in Full-Duplex Mode
Configurable Through SPI Compliant Port or MODE Selection Pins
Independent Rx and Tx Converter Powerdown Control Pins
64 Lead LFCSP Package (9 mm x 9 mm Footprint)

Data Sheets

Document	note
AD9863: 12-Bit Mixed-Signal Front-End (MxFE™) Baseband Transceiver For Broadband Applications Data Sheet (Rev. A)	PDF 991 kB

Application Notes

Document	note
AN-928: Understanding High Speed DAC Testing and Evaluation (Rev. B)	PDF 4445 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)	PDF 1535 kB
AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev. 0)	PDF 262 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD9863BCPZ-50 Production	64 ld LFCSP (9x9mm, 7.10 exposed pad)	OTH 260	-40 to 85C	25.5	21.68	Y
AD9863BCPZRL-50 Production	64 ld LFCSP (9x9mm, 7.10 exposed pad)	REEL 2500	-40 to 85C	0	21.68	Y