描述 Description

The MAX4548/MAX4549 serial-interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications. The devices include three crosspoint switch matrices, each containing three inputs and two outputs. To improve off-isolation, each switch matrix has a shunt input and each output is selectively programmable for clickless or regular-mode operation. A selectable set of internal resistive voltage dividers supplies DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage dividers include four externally accessible bypass points.
The MAX4548/MAX4549 feature 35Ω max on-resistance, 7Ω on-resistance matching between channels, 5Ω on-resistance flatness, and 0.07% total harmonic distortion (THD). Additionally, they feature off-isolation of -85dB at 20kHz and -72dB at 10MHz, with crosstalk of -85dB at 20kHz and -55dB at 10MHz. The MAX4548 uses a 2-wire I2-compatible serial interface, while the MAX4549 uses a 3-wire SPI?/QSPI?/MICROWIRE?-compatible serial interface. These parts are available in 36-pin SSOP packages and are specified for the extended (-40°C to +85°C) operating range.

特性 Features

? Selectable Soft-Switching Mode for \"Clickless\" Audio Operation
? 22Ω Typical On-Resistance (+5V Supply)
? 5Ω Typical On-Resistance Matching Between Channels
? 2Ω Typical On-Resistance Flatness
? Audio Performance
? -85dB Off-Isolation at 20kHz
? -85dB Crosstalk at 20kHz
? 0.07% THD with 600Ω Load
? Video Performance
? -72dB Off-Isolation at 10MHz
? -55dB Crosstalk at 10MHz
? Serial Interface
? 2-Wire I2C-Compatible (MAX4548)
? 3-Wire SPI/QSPI/MICROWIRE-Compatible (MAX4549)
? Single-Supply Operation from +2.7V to +5.5V

應(yīng)用 Application

? 高端音頻系統(tǒng)
? PC多媒體板
? 安全系統(tǒng)
? 機(jī)頂盒
? 視頻會議系統(tǒng)

簡介

MAX4548屬于集成電路（IC）的模擬開關(guān)-特殊用途。由制造生產(chǎn)的MAX4548模擬開關(guān) - 特殊用途特殊用途模擬開關(guān)通過固態(tài)設(shè)備路由模擬信號。該系列產(chǎn)品的與眾不同之處在于，這些模擬開關(guān)針對特定的應(yīng)用，因此具有通用模擬開關(guān)通常所沒有的獨(dú)特功能。