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ADG509F:  8-Channel/4-Channel Fault-Protected Analog Multiplexer

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Статус продукта:Производство

The ADG508F and ADG509F are CMOS analog multiplexers, with the ADG508F comprising eight single channels and the ADG509F comprising four differential channels. These 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 with power suppplies off, 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 that drive the multiplexer.

The ADG508F switches one of eight inputs to a common output as determined by the 3-bit binary address lines A0, A1 and A2. The ADG509F switches one of four differential inputs to a common differential output as determined by the 2-bit binary address lines A0 and A1. An EN input on each device is used to enable or disable the device. When disabled, all channels are switched OFF.

Product Highlights
  1. Fault protection. The ADG508F/ADG509F 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.
  2. On channel saturates while fault exists.
  3. Low RON.
  4. Fast switching times.
  5. Break-before-make switching. Switches are guaranteed break-before-make so that input signals are protected against momentary shorting.
  6. Trench isolation eliminates latch-up. A dielectric trench separates the p and n-channel MOSFETs thereby preventing latch-up.

Applications

  • Existing multiplexer applications (both fault-protected and nonfault-protected)
  • New designs requiring multiplexer functions

ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

  • All switches off with power supply off
  • Analog output of on channel clamped within power supplies if an overvoltage occurs
  • Latch-up proof construction
  • Low on resistance (270 Ω typical)
  • Fast Switching Times
    ton 230 ns maximum
    toff 130 ns maximum
  • Low power dissipation (3.3 mW maximum)
  • Fault and overvoltage protection (−40 V to +55 V)
  • Break-before-make construction
  • TTL and CMOS compatible inputs

Functional Block Diagram for ADG509F

OF NOTE ...

For additional information, please see also the ADG508F and the ADG528F.

Документация

Наименование Тип контента Тип файлов
ADG508F/ADG509F: 8-Channel/4-Channel Fault-Protected Analog Multiplexers Data Sheet (Rev F, 07/2011) (pdf, 281 kB) Технические описания PDF
AN-1024: How to Calculate the Settling Time and Sampling Rate of a Multiplexer  (pdf, 210 kB) Статьи по применению PDF
Data-acquisition system uses fault protection
By Catherine Redmond, Analog Devices, Inc. (EDN, 4/15/2004)
Технические статьи HTML
CMOS Switches Offer High Performance in Low Power, Wideband Applications  (pdf, 320 kB)
by Theresa Corrigan and Ray Goggin, Analog Devices, Inc. (High Frequency Electronics, February 2004)
Технические статьи PDF
Temperature monitor measures three thermal zones
by Susan Pratt, Analog Devices, Inc. (EDN, 12/11/03)
Технические статьи HTML
Enhanced Multiplexing for MEMS Optical Cross Connects
by James Caffrey (Fiberoptic Product News, 8/2003)
Технические статьи HTML
Winning the Battle Against Latchup in CMOS Analog Switches
(Analog Dialogue, Vol. 35, No. 5, October, 2001)
Журнал Analog Dialogue HTML
Switches and Multiplexers Product Selection Guide  (pdf, 1462 kB) Product Selection Guide PDF
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

Средства разработки, программные модели, драйверы и ПО

Наименование Тип контента Тип файлов
ADG509F SPICE Macro-Model Модели SPICE HTML

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