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ADG528F: 8-Channel Fault-Protected Analog Multiplexer Data Sheet (Rev. F)7/20/2011PDF280 kB
Overview
Features and Benefits
- Low on resistance (300 Ω typical)
- Fast Switching Times
ton 250 ns max
toff 250 ns max - Low Power Dissipation (3.3 mW Max)
- Fault and overvoltage protection (- 40 V to + 55 V)
- All Switches off with power supply off
- Analog output of on channel clamped within power supplies if an overvoltage occurs
- Latch-up proof construction
- Break-before-make switching action
- TTL and CMOS compatible inputs
Product Details
The ADG528F is a CMOS analog multiplexer, with the comprising eight single channels. The multiplexer provides fault protection. Using a series n-channel, p-channel, n-channel MOSFET structure, both device and signal source protection is provided in the event of an overvoltage or power loss. The multiplexer can withstand continuous overvoltage inputs from -40 V to +55 V. During fault conditions, the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current will flow. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources which drive the multiplexer.
The ADG528F switch one of eight inputs to a common output as determined by the 3-bit binary address lines A0, A1 and A2. The ADG528F has on-chip address and control latches that facilitate microprocessor interfacing. An EN input on each device is used to enable or disable the device. When disabled, all channels are switched OFF.
PRODUCT HIGHLIGHTS
- Fault protection. The ADG528F can withstand continuous voltage inputs from −40 V to +55 V. When a fault occurs due to the power supplies being turned off, all the channels are turned off and only a leakage current of a few nanoamperes flows.
- On channel turns off while fault exists.
- Low RON.
- Fast switching times.
- Break-before-make switching. Switches are guaranteed break-before-make so that input signals are protected against momentary shorting.
- Trench isolation eliminates latch-up. A dielectric trench separates the p-channel and n-channel MOSFETs thereby preventing latch-up.
APPLICATIONS
- Existing multiplexer applications (both fault-protected and nonfault-protected)
- New designs requiring multiplexer functions
Product Categories
Markets and Technologies
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.
Documentation & Resources
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AN-1024: How to Calculate the Settling Time and Sampling Rate of a Multiplexer (Rev. 0)7/31/2009PDF210 kB
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AN-32: Single Supply Operation of JFET Multiplexers1/1/2000PDF87 kB
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Switches and Multiplexers Product Selection Guide5/9/2008PDF614 K
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Ask The Applications Engineer—40: Switch and Multiplexer Design Considerations for Hostile Environments5/1/2011 Analog Dialogue
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Data-acquisition system uses fault protection4/15/2004
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Temperature monitor measures three thermal zones12/11/2003
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Enhanced Multiplexing for MEMS Optical Cross Connects8/1/2003
Tools & Simulations
SPICE Models
ADG528F SPICE Macro Models
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Support & Discussions
ADG528F Discussions
Sample & Buy
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