MAX4570
Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches
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Overview
Features and Benefits
- Selectable Soft Switching Mode for Clickless Audio Operation
- 43Ω Typical On-Resistance (±5V Supplies)
- 5Ω Typical On-Resistance Matching Between Channels
- 4Ω Typical On-Resistance Flatness
- 0.014% Total Harmonic Distortion with 1kΩ Load
- -110dB Off-Isolation at 20kHz
- -78dB Off-Isolation at 4MHz
- -95dB Crosstalk at 20kHz
- -54dB Crosstalk at 4MHz
- Serial Interface
- 2-Wire, Fast-Mode, I²C-Compatible (MAX4550)
- 3-Wire, SPI/QSPI/MICROWIRE-Compatible (MAX4570)
- Four Auxiliary Outputs that Extend µP Ports
- Single-Supply Operation: +2.7V to +5.5V
- Dual-Supply Operation: ±2.7V to ±5.5V
Product Details
The MAX4550/MAX4570 serial-interface, programmable, dual 4x2 audio/video crosspoint switches are ideal for multimedia applications. Each device contains two identical crosspoint switch arrays, each with four inputs and two outputs. To improve off-isolation, use the additional crosspoint inputs SA and SB as shunts. Each output is selectively programmable for clickless or regular mode operation. A set of internal resistive voltage-dividers supplies DC bias for each output when using AC-coupled inputs. Additionally, four auxiliary outputs control additional circuitry via the MAX4550/MAX4570's 2-wire or 3-wire interface.
The MAX4550/MAX4570 feature 80Ω on-resistance, 10Ω on-resistance matching between channels, 5Ω on-resistance flatness, and 0.014% total harmonic distortion. Additionally, they feature off-isolation of at least -110dB in the audio frequency range and -78dB at 4MHz, with -95dB crosstalk in the audio frequency range and -54dB at 4MHz. The MAX4550 uses a 2-wire I²C-compatible serial interface, while the MAX4570 uses a 3-wire SPI™/QSPI™ or MICROWIRE™-compatible serial interface. These parts are available in 28-pin SSOP and wide SO packages and are tested over either the commercial (0°C to +70°C) or extended (-40°C to +85°C) operating temperature range.
Applications
- High-End Audio Systems
- PC Multimedia Boards
- Set-Top Boxes
- Video Conferencing Systems
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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Selecting the Right CMOS Analog Switch1/29/2013
Design Resources
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