Mouser Electronics is now stocking the F197x 75-Ohm digital step attenuators from Integrated Device Technology (IDT). IDT F197x digital step attenuators (DSAs) are the newest additions to IDT’s Glitch-Free family of radio frequency (RF) silicon solutions. The F197x devices are ideal for applications such as cable modem termination systems (CMTS), fiber distribution networks, and hybrid fiber-coaxial (HFC) distribution nodes, and are optimized for the demanding requirements of the broadband and CATV markets.
IDT’s F1975 and F1977 DSAs, available from Mouser Electronics, cover a broad 5 MHz – 3,000 MHz frequency range while delivering low insertion loss and distortion. IDT's Glitch-Free technology protects amplifiers and analog to digital converters (ADCs) from damage during transitions between attenuation states by reducing attenuation setting overshoot (glitches) during most significant bit (MSB) transitions by up to 95 percent.
The F197x DSAs boast an ultra-high IIP3 linearity of 65dBm, a wide temperature range of -40 to 105 degrees Celsius, and a 75-ohm impedance that offers ease of integration in data networks. The 6-bit F1975 DSA provides gain control at 0.5dB steps with insertion loss of only 1.2dB (at 1GHz). The F1977 device is the industry's first monolithic silicon, 75-Ohm, Glitch-Free, 7-bit DSA, enabling customers to achieve 0.25dB gain control while maintaining excellent RF performance.
IDT’s F197x development tools, also available from Mouser Electronics, allow engineers to easily evaluate the F197x DSAs. Using F197xEVBI evaluation boards, engineers can set attenuation by either the parallel control input or its serial control input (through external connection and control). The board includes a DIP switch that allows users to set the attenuation state without off-board connections to the control inputs. The F197xEVS kits are complete hardware and software solutions that allows engineers to digitally control the DSAs with the USB output on a computer. The kits include the corresponding F197xEVBI board, as well as a USB Digital Control Board and interface cables.