16-bit, 12 Gsample/sec DAC delivers 2.5 GHz bandwidth

July 12, 2016 // By Graham Prophet
Analog Devices has added a digital-analogue converter with specifications that the company presents as particularly applicable to distribution of HD and 4K television content, as well as RF applications with direct-to-RF synthesis designs.

 

The 16-bit, 12-Gsample/sec AD9162 converter offers 2.5-GHz bandwidth, which exceeds the 1.794-GHz optional future requirement specified by the cable industry’s DOCSIS 3.1 standard by nearly 40%. The wider bandwidth affords cable operators the ability to plan next-generation network upgrades and capacity expansions without changing converter designs.

 

The converter’s dynamic range of -82-dBc SFDR at -167-dBm/Hz NSD allows designers to synthesize signals across a wide frequency spectrum from direct-to-RF up to 6 GHz. In wireless applications, this eliminates an IF-to-RF up-conversion stage and local oscillator generation. The AD9162 supports all wireless communications infrastructure protocols (WCDMA, LTE, LTE-A, point-to-point), enabling advanced multiband and multi-standard radio designs.

 

The AD9162 integrates a 2x interpolator (FIR85) that enables configurations for lower data rates and converter clocking to reduce overall system power and ease filtering requirements. In mix-mode operation, the RF D/A converters can be configured to reconstruct RF carriers in the 2nd and 3rd Nyquist zones up to 7.5 GHz while maintaining dynamic range.

 

Use it, ADI suggests, in 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 and automatic test equipment (ATE); and in radars and jammers.

 

In TV distribution, the converter will support ultra-high-definition (UHD) and 4K resolution across more channels at greater streaming and download speeds. Its specification summary appears in the table below;

 








Product

DDS Frequency Hopping

Update Rate

Direct RF Synthesis

Baseband Mode

Normal Mode

Mix-Mode

AD9162

NA

12 GSPS

6 GSPS

DC to 2.5 GHz

DC to 6 GHz

1.5 to 7.5 GHz

 

In 8 x 8 mm CSP-BGA or in 11 x 11 mm CSP-BGA, the part costs $150 (1000).

 

Analog Devices; www.analog.com/AD9162

 

 

next page; detail description from ADI product page