AD8115AST

Analog Switches, Multiplexers, Demultiplexers Overview

The AD8115AST is a 16 × 16 high-speed nonblocking video crosspoint switch matrix manufactured by Analog Devices. It features a −3 dB bandwidth of 225 MHz and a slew rate of 375 V/µs. The device operates on ±4.5 V to ±5.5 V supplies with an idle current of 70 mA. It provides buffered inputs, programmable high-impedance outputs, and drives 150 Ω loads. Key performance metrics include 0.05% differential gain error, 0.05° differential phase error, and −70 dB crosstalk at 5 MHz.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• 16 × 16 high-speed nonblocking switch array with G = +2
• Serial or parallel programming with daisy-chain capability via serial data output
• Programmable high-impedance output disable for bus paralleling without loading
• TTL-compatible logic interface supporting asynchronous reset and individual output updates

Analog Switches, Multiplexers, Demultiplexers Applications

• Video signal routing (NTSC, PAL, S, SECAM, YUV, RGB)
• Compressed video processing (MPEG, wavelet)
• 3-level digital video transmission (HDB3)
• Data communications systems
• Telecommunications infrastructure

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'AST' against the manufacturer's ordering guide to confirm temperature range and package variant. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Check for any recent product change notices regarding pinout or electrical specifications. Ensure supply chain availability aligns with project timelines as distribution may vary.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the AD8115AST when a voltage gain of 2 is required for the crosspoint switches. Choose this component over the AD8114 if driving 150 Ω loads necessitates higher output swing. Consider the serial control interface for space-constrained designs requiring fewer control lines. Evaluate power dissipation limits relative to ambient operating temperatures within the LQFP package.

Analog Switches, Multiplexers, Demultiplexers Part Context

This component belongs to the AD8114/AD8115 family of low-cost, high-speed video crosspoint switches. It shares the same physical footprint and control logic with the AD8114, differing primarily in internal amplifier gain configuration. The series is designed for applications requiring extensive signal matrixing with minimal signal degradation and low power consumption.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The AD8114 serves as a functional substitute if unity gain (G=1) is acceptable instead of G=2. For smaller arrays, the AD8108/AD8109 (8 × 8) or AD8110/AD8111 (16 × 8) offer compatible control interfaces. Verify that any replacement maintains the required 225 MHz bandwidth and −70 dB crosstalk specifications.