AD8115ASTZ

Overview

The AD8115ASTZ is a high-speed, non-blocking 16 × 16 video crosspoint switch matrix manufactured by Analog Devices Inc. It features buffered inputs and sixteen independent output amplifiers configured with a fixed gain of +2. The device operates on dual ±5 V power supplies and supports both serial and parallel digital control interfaces for programming the switch array. It provides excellent video performance metrics, including a −3 dB bandwidth of 225 MHz, a slew rate of 375 V/µs, and low crosstalk of −70 dB at 5 MHz. The component is housed in a 100-lead LQFP package (14 mm × 14 mm) and functions within an extended industrial temperature range of −40°C to +85°C.

Feature Summary

• Features a 16x16 high-speed nonblocking switch array with programmable serial or parallel control interfaces.
• Includes sixteen independent output buffers capable of being placed into a high impedance state to prevent loading the output bus.
• Supports daisy-chaining multiple arrays via a serial data output interface for scalable system expansion.
• Provides a dedicated reset pin to disable all outputs simultaneously, preventing bus conflicts during power-up.

Applications

• Routing of uncompressed video signals such as NTSC, PAL, S, SECAM, YUV, and RGB.
• Switching compressed video formats including MPEG and wavelet standards.
• Handling 3-level digital video signals like HDB3.
• High-speed data communications and telecommunications signal routing.

Procurement Notes

Verify that the specific part number matches the required gain configuration, as the AD8115 offers a gain of +2 compared to the unity gain AD8114. Confirm the package type is the 100-lead LQFP and ensure the operating temperature range meets the application's environmental requirements. Check datasheet specifications for supply voltage tolerances and logic level compatibility before integration.

Selection Notes

Select the AD8115ASTZ when a voltage gain of +2 is required for the crosspoint switching application. Consider the AD8114 if a gain of 1 is preferred. Evaluate the need for serial versus parallel control based on available microcontroller pins and speed requirements. Ensure the design can accommodate the dual ±5 V supply rails and the thermal dissipation characteristics of the 100-lead LQFP package under maximum load conditions.

Part Context

The AD8115 is part of the AD8114/AD8115 family of high-speed video crosspoint switches from Analog Devices. It shares the same physical footprint, pinout, and control logic as the AD8114, differing primarily in its internal amplifier gain setting. This family is designed for applications requiring large-scale signal routing with minimal signal degradation and low power consumption relative to performance capabilities.

Replacement Considerations

The AD8114ASTZ serves as a direct functional substitute if a gain of 1 is acceptable instead of +2. For larger arrays, multiple AD8115 units can be cascaded using the serial data out feature. Smaller matrix requirements may utilize the AD8108, AD8109, AD8110, or AD8111 models.