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ADG784:  CMOS 3V/5 V, Wide Bandwidth Quad 2:1 Mux in Chip Scale

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The ADG784 is a monolithic CMOS device comprising four 2:1 multiplexer/demultiplexers with high impedance outputs. The CMOS process provides low power dissipation yet gives high switching speed and low on resistance. The on-resistance variation is typically less than 0.5 Ω with an input signal ranging from 0 V to 5 V.

The bandwidth of the ADG784 is greater than 200 MHz and this, coupled with low distortion (typically 0.5%), makes the part suitable for switching fast ethernet signals.

The on-resistance profile is very flat over the analog input range ensuring excellent linearity and low distortion when switching audio signals. Fast switching speed, coupled with high signal bandwidth, also makes the part suitable for video signal switching. CMOS construction ensures ultralow power dissipation making the parts ideally suited for portable and battery powered instruments.

The ADG784 operates from a single 3.3 V/5 V supply and is TTL logic compatible. The control logic for each switch is shown in the Truth Table.

These switches conduct equally well in both directions when ON, and have an input signal range that extends to the supplies. In the OFF condition, signal levels up to the supplies are blocked. The ADG784 switches exhibit break-before-make switching action.

Product Highlights

  1. Also Available as ADG774 in 16-Lead QSOP and SOIC.
  2. Wide Bandwidth Data Rates >200 MHz.
  3. Ultralow Power Dissipation.
  4. Extended Signal Range. The ADG784 is fabricated on a CMOS process giving an increased signal range that fully extends to the supply rails.
  5. Low Leakage over Temperature.
  6. Break-Before-Make Switching. This prevents channel shorting when the switches are configured as a multiplexer.
  7. Crosstalk is typically –70 dB @ 30 MHz.
  8. Off isolation is typically –60 dB @ 10 MHz.
  9. Available in Chip Scale Package (CSP).

Applications

  • 100VG-AnyLAN
  • Token Ring 4 Mbps/16 Mbps
  • ATM25/155
  • NIC Adapter and Hubs
  • Audio and Video Switching
  • Relay Replacement

ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

  • Low Insertion Loss and On Resistance: 4 Ω Typical
  • On-Resistance Flatness <2 Ω
  • Bandwidth >200 MHz
  • Single 3 V/5 V Supply Operation
  • Rail-to-Rail Operation
  • Very Low Distortion: <1%
  • Low Quiescent Supply Current
    (100 nA Typical)
  • Fast Switching Times
    - tON 10 ns
    - tOFF 4 ns
  • TTL/CMOS Compatible
  • For Functionally Equivalent Devices in 16-Lead QSOP/ SOIC Packages, see ADG774

Functional Block Diagram for ADG784

Документация

Наименование Тип контента Тип файлов
ADG784: CMOS 3 V/5 V, Wide Bandwidth Quad 2:1 Mux in Chip Scale Package Data Sheet (Rev A, 02/2013) (pdf, 125 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
Switches and Multiplexers Product Selection Guide  (pdf, 1462 kB) Product Selection Guide PDF
Multiplexer Parametric Search Product Selection Guide HTML
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

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