11-Bit, 12 GSPS, RF Digital-to-Analog Converters

The AD9161 is a high performance, 11-bit digital-to-analog converter (DAC) that supports data rates to 6 GSPS. The DAC core is based on a quad-switch architecture coupled with a 2× interpolator filter that enables an effective DAC update rate of up to 12 GSPS in some modes. The high dynamic range and bandwidth makes these DACs ideally suited for the most demanding high speed radio frequency (RF) DAC applications.

In baseband mode, wide bandwidth capability combines with high dynamic range to support DOCSIS 3.1 cable infrastructure compliance from the minimum of two carriers to full maximum spectrum of 1.794 GHz. A 2× interpolator filter (FIR85) enables the AD9161/AD9162 to be configured for lower data rates and converter clocking to reduce the overall system power and ease the filtering requirements. In Mix-Mode™ operation, the AD9161/AD9162 can reconstruct RF carriers in the second and third Nyquist zones up to 7.5 GHz while still maintaining exceptional dynamic range. The output current can be programmed from 8 mA to 38.76 mA. The AD9161/AD9162 data interface consists of up to eight JESD204B serializer/deserializer (SERDES) lanes that are programmable in terms of lane speed and number of lanes to enable application flexibility.

A serial peripheral interface (SPI) can configure the AD9161/AD9162 and monitor the status of all registers. The AD9161/AD9162 are offered in an 165-ball, 8.0 mm × 8.0 mm, 0.5 mm pitch, CSPBGA package and in an 169-ball, 11 mm × 11 mm, 0.8 mm pitch, CSPBGA package, including a leaded ball option for the AD9162.

Product Highlights

* High dynamic range and signal reconstruction bandwidth supports RF signal synthesis of up to 7.5 GHz.

* Up to eight lanes JESD204B SERDES interface flexible in terms of number of lanes and lane speed.

* Bandwidth and dynamic range to meet DOCSIS 3.1 compliance with margin.

Applications

* Broadband communications systems

* DOCSIS 3.1 cable modem termination system (CMTS)/video on demand (VOD)/edge quadrature amplitude modulation (EQAM)

* Wireless communications infrastructure

* W-CDMA, LTE, LTE-A, point to point

* Instrumentation, automatic test equipment (ATE)

* Radars and jammers

* DAC update rate up to 12 GSPS (minimum)

* Direct RF synthesis at 6 GSPS (minimum)

* DC to 2.5 GHz in baseband 1× bypass mode

* DC to 6 GHz in 2× nonreturn-to-zero (NRZ) mode

* 1.5 GHz to 7.5 GHz in Mix-Mode