USB Vector Network Analyzer
The LTC6952, LTC6953, LTC6955 and LTC6955-1 family of low jitter, high-performance clock generation and distribution devices support JESD204B subclass 1 clocking applications up to 7.5GHz. These products are suitable for high-speed data converter clocking applications, with a scalable architecture to provide thousands of synchronized low jitter clocks, each with a complementary SYSREF signal. LTC6952: ultralow jitter, 4.5GHz PLL with 11 outputs and JESD204B support. LTC6953: ultralow jitter, 4.5GHz clock distributor with 11 outputs and JESD204B support. LTC6955: ultralow jitter, 7.5GHz, 11 output fanout buffer. LTC6955-1: LTC6955 with additional ÷2 on one output. The LTC6952 is a high performance, ultralow jitter, JESD204B clock generation and distribution device. It includes a phase-locked-loop (PLL) core, consisting of a reference divider, phase-frequency detector (PFD) with a phase-lock indicator, ultralow noise charge pump and integer feedback divider. The LTC6952’s eleven outputs can be configured as up to five JESD204B subclass 1 device clock/SYSREF pairs plus one general purpose output, or simply 11 general-purpose clock outputs for non-JESD204B applications. Each output has its own individually programmable frequency divider and output driver. All outputs can be synchronized and set to precise phase alignment using individual coarse half-cycle digital delays and fine analog time delays. For applications requiring more than eleven total outputs, multiple LTC6952s can be connected using the EZSync™ or ParallelSync™ synchronization protocols. The LTC6953 is the clock distribution function of the LTC6952. The LTC6955 is an 11 output fanout buffer with a parallel interface that selects one of three states per output group: in-phase, 180° out of phase, or power-down. The LTC6955-1 is the same as the LTC6955-1 except one output has an integrated ÷2. All devices are offered in a 52-lead, 7 mm × 8 mm plastic QFN package. Analog Devices
Fault-insertion switching
This vendor has expanded its range of PXI fault-insertion switching. The new Model 40-202 PXI fault-insertion switches, available with 22 or 11 fault-insertion channels, were primarily designed to simulate fault conditions in automotive and avionics test applications involving the reliability testing of safety-critical controllers. They are specifically designed for differential signaling requirements, with capabilities to insert three different types of fault conditions between the test fixture and the equipment under test: open-circuit, short-circuit between signal pairs, and short-circuit to user-applied fault conditions such as power or ground. These new models complement a range of PXI fault-insertion switches, which are typically used in hardware-in-the-loop simulation applications for electronic control unit validation. Relays in-line with the signal paths allow open-circuit conditions to be simulated on either side or both sides of a signal pair. Relays between each channel pair enable adjacent signals to be shorted, and relays between signal paths and the fault connection allow the application of external fault conditions. The switching topology of the 40-202 fault insertion switches allows switching channels to be interconnected so that complex fault-insertion channels can be constructed. These products are supported by the vendor’s eBIRST switching-system test tools, which provide a quick and easy way of finding relay failures within the modules. In addition, Switch Path Manager signal-routing software may be used to simplify signal routing through complex switching systems. Pickering Interfaces