S-parameter magnitude and phase measurementĪDI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. Broadband, multi-port vector network analyzers. The ADL5960 is offered in a small footprint 26-lead, 3 mm × 4 mm LFCSP. The IF amplifiers have an adjustable output common-mode level and sufficient drive capability to interface directly with a wide range of ADCs.Īll configurations and functions in the ADL5960 are fully programmable through a 3-wire serial peripheral interface (SPI) using the ADI-SPI interface standard. The IF filters with programmable bandwidth and IF amplifiers with individually programmable gain enable simultaneous dynamic range optimization of the IF signals at the incident channel (IFFP and IFFM) and reverse channel (IFRP and IFRM) IF interfaces. Driving this interface at the ADC sample frequency with the divide by 4 enabled, automatically centers the IF output signal in the first Nyquist zone. The frequency of the IF output signals is then determined by the low-frequency source driving the (OFP and OFM) interface. The IF frequency offset mixer, driven through the (OFP and OFM) interface, enables further simplification by allowing the (swept) RF and LO signals to be driven by the same frequency source. This enables operation over the full 20 GHz bandwidth of the ADL5960 using a 6 GHz synthesizer as the LO source. The frequency divider and multipliers in the LO interface enable measurement sweeps beyond the operating frequency range of the source driving the (LOP and LOM) pins. 
The ADL5960 supports several different LO interface configurations that simplify the clocking design of a VNA solution as well as the interfacing of the device to an analog-to-digital converter (ADC).
The bridge provides >10 dB of directivity up to 17 GHz, and the primary transmission line of the bridge, from RFIN to RFOUT, is wideband impedance matched to 50 Ω and has a flat frequency response with <2.5 dB typical insertion loss. The ADL5960 is a wideband vector network analyzer front-end consisting of a resistive bidirectional bridge, down-conversion mixers, programmable IF amplifiers and filters, and a highly flexible local oscillator (LO) interface.
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