LTC6957IDD-1

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LTC6957IDD-1 application field and working principle.

The LTC6957IDD-1 is part of the family of Clock / Timing products from Linear Technology. It is a Multi Output, Wide Supply, Clock Driver designed to provide superior frequency management over extended temperature range. The LTC6957IDD-1 is ideal for applications that require multiple outputs to be generated from a single clock input. It is designed to minimize the boundaries between the analog and digital worlds by providing output frequency versatility and a wide operating temperature range of -20°C to +85°C.

The design of this device is based on the principle of differential current-mode logic (DCL), which has various characteristics that improve frequency multiplication and division capabilities by avoiding error-prone edge truncation techniques used in prior devices. The LTC6957IDD-1 has multiple outputs with individually programmable duty cycles over a wide operating range. This allows specifiers the flexibility to choose the duty cycle perfect for the system requirements.

The device can drive multiple outputs at independent frequency dividers, and has been optimized to use a fixed operating temperature range of -20°C to +85°C, with a maximum clock input frequency of 50 MHz. Additionally, the device features a DC supply voltage of 3.3V, with an input logic level to match the 33V supply for low EMI. This low-cost solution offers a rapid response time of 15 ps and is optimal for low-speed applications.

The device is ideal for applications such as synchronizing multiple clock sources, frequency multiplication and division, wide supply clock drivers, synchronizing of high performance communications links, and power efficient frequency management. It provides an output frequency range of over 7GHz and supports an extended temperature range from -20°C to +85°C.

The LTC6957IDD-1 features a pin-out optimized for each application, allowing for the best possible mean time between failure (MTTF). All outputs are protected against electrostatic discharges (ESD) to a maximum of +/-4kV Human Body Model for ESD protection. The device also features a partial shut down feature, making it ideal for low power or background board applications. Additionally, the LTC6957IDD-1 features a built-in GND sensing circuitry to optimize performance in the presence of GND bounce.

The device offers excellent signal to noise performance while maintaining low power consumption, ensuring the highest possible system performance. It is also an ideal choice for high temperature environments, since the device is optimized for temperature operation and offers an extended temperature range of -20°C to +85°C. The LTC6957IDD-1 is available in a 32-pin, 5 mm x 7 mm, quad flat no-lead (QFN) package.

In summary, the LTC6957IDD-1 is an ideal solution for clock / timing applications, with applications in synchronizing multiple clock sources, frequency multiplication and division, wide supply clock drivers, synchronizing of high performance communications links, and power efficient frequency management. It offers an extended temperature range of -20°C to +85°C, high signal to noise performance, low power consumption, and an integrated partial shut down feature. Additionally, the device has a DC supply voltage of 3.3V, with an input logic level to match the 33V supply for low EMI.

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