The AD9869 is a mixed-signal front-end (MxFE®) IC for transceiver applications requiring Tx path and Rx path functionality with data rates up to 80 MSPS. A lower cost, pin-compatible version of the AD9866, the AD9869 removes the current amplifier (IAMP) IOUTP functionality and limits the PLL VCO operating range of 80 MHz to 200 MHz.

The part is well suited for half- and full-duplex applications. The digital interface is extremely flexible, allowing simple interfacing to digital back ends that support half- or full-duplex data transfers, often allowing the AD9869 to replace discrete ADC and DAC solutions. Power-saving modes include the ability to reduce power consumption of individual functional blocks or power down unused blocks in half-duplex applications. A serial port interface (SPI) allows software programming of the various functional blocks. An on-chip PLL clock multiplier and synthesizer provide all the required internal clocks, as well as two external clocks, from a single crystal or clock source.

The Tx signal path consists of a 2×/4× low-pass interpolation filter, a 12-bit TxDAC, and a line driver. The transmit path signal bandwidth can be as high as 34 MHz at an input data rate of 80 MSPS. The TxDAC provides differential current outputs that can be steered directly to an external load or to an internal low distortion current amplifier (IAMP) capable of delivering 17 dBm peak signal power. Tx power can be digitally controlled over a 19.5 dB range in 0.5 dB steps.

The receive path consists of a programmable amplifier (RxPGA), a tunable low-pass filter (LPF), and a 12-bit ADC. The low noise RxPGA has a programmable gain range of −12 dB to +48 dB in 1 dB steps. Its input referred noise is less than 3 nV/√Hz for gain settings beyond 36 dB. The receive path LPF cutoff frequency can be set over a 15 MHz to 35 MHz range or it can be simply bypassed. The 12-bit ADC achieves excellent dynamic performance up to an 80 MSPS span. Both the RxPGA and the ADC offer scalable power consumption allowing power/performance optimization.

The AD9869 provides a highly integrated solution for many broadband modems. It is available in a space-saving package, a 16-lead LFCSP, and is specified over the commercial temperature range (−40°C to +85°C).

Applications

Broadband wireline networking

Data Sheet, Rev. 0, 5/07

Part#	RxTx Function	Channel BW MHz	IF or RF Range MHz	Primary Application	Supply V	Product Description	Price* (1000-4999)	Resolution (Bits)	# Chan	T-Put Rate
AD9868	Bband CODEC	-	-	Broadband Wireline, Home Networking	Multi(+3.3Anlg, +3.3Dig)	10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications	-	10	1	80MSPS
AD9865	Bband CODEC	35	DC-40	Broadband Wireline, Home Networking	Single(+3.3)	10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications	$9.95	10	1	80MSPS
AD9869	Bband CODEC	54	DC-40	Broadband Wireline, Home Networking	Multi(+3.3Anlg, +3.3Dig), Single(+3.3)	12-Bit DAC/80 MSPS, 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications	$18.05	12	1	80MSPS
AD9866	Bband CODEC	35	DC-40	Broadband Wireline, Home Networking	Single(+3.3)	12-Bit DAC/80 MSPS 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications	$18.55	12	1	80MSPS
AD9863	Bband Quadrature CODEC	25/40	DC-40	Broadband Wireless	Single(+3), Single(+3.3)	Dual, 12-Bit DAC/12-Bit 50/80 MSPS ADC, Mixed-Signal Front-End Processor (MxFE™) For Bband Apps	$21.42	12	2	50MSPS
AD9861-50	Bband Quadrature CODEC	25	DC-40	Broadband Wireless	Single(+3), Single(+3.3)	Dual 10-Bit DAC/Dual 50 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps	$10.71	10	2	50MSPS
AD9861-80	Bband Quadrature CODEC	40	DC-40	Broadband Wireless	Single(+3), Single(+3.3)	Dual 10-Bit DAC/Dual 80 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps	$10.71	10	2	80MSPS
AD9862	Bband Quadrature CODEC	32	DC-100	Broadband Wireless	Single(+3.3)	Dual 14-Bit DAC/Dual 12-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB	$29.75	12	2	64MSPS
AD9860	Bband Quadrature CODEC	32	DC-100	Broadband Wireless	Single(+3.3)	Dual 12-Bit DAC/Dual 10-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB	$13.74	10	2	64MSPS
AD6600	IF-to-Bits Rx Subsys	5 to 10	70-250	Wireless Infrastructure	Multi(+3.3, +5), Single(+5)	11-Bit, 1-Channel 20MSPS, or 2-Channel 10 MSPS Gain-Ranging ADC with RSSI	$38.50	11	2	20MSPS
AD9864	IF-to-Bits Rx Subsys	0.007 to 0.270	10-300	Narrowband Radio, Portable & Mobile Radio	Single(+3), Single(+3.3)	24-Bit Bandpass Sigma-Delta ADC/IF Digitizing Subsystem	$9.95	24	1	375kSPS
AD9874	IF-to-Bits Rx Subsys	0.007 to 0.270	10-300	Narrowband Radio, Portable & Mobile Radio	Single(+3), Single(+3.3)	24-Bit Bandpass Sigma-Delta ADC IF Digitizing Subsystem	$14.96	24	1	541.5kSPS
AD6650	IF-to-Bits Rx Subsys	3.5	70-300	Wireless Infrastructure	Single(+3), Single(+3.3)	16/24-Bit, 1 MSPS, Diversity IF-to-Baseband GSM/EDGE Narrowband Receiver	$20.40	24	2	1MSPS
AD9969	Multi-Chan Bband CODEC	8	DC-70	Cable Modem/Set Top Box	Single(+3.3)	3.3 V CMOS MxFE™ Mixed Signal Front End for broadband Set Top Box And Cable Modem applications	$14.25	12	3	29MSPS
AD9878	Multi-Chan Bband CODEC	8	DC-70	Cable Modem/Set Top Box	Single(+3.3)	Dual 12-Bit, 29 MSPS Direct IF ADC/12-Bit Direct IF DAC, Mixed-Signal Front-End for Broadband Apps	$13.52	12	4	29MSPS
AD9879	Multi-Chan Bband CODEC	8	DC-70	Cable Modem/Set Top Box	Single(+3.3)	12-Bit Mixed-Signal Front-End for Set Top Box & Cable Modem Applications	$11.98	12	5	29MSPS

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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