ADG784 Analog Devices, ADG784 Datasheet

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ADG784

Manufacturer Part Number
ADG784
Description
CMOS 3 V/5 V/ Wide Bandwidth Quad 2:1 Mux in Chip Scale Package
Manufacturer
Analog Devices
Datasheet
a
GENERAL DESCRIPTION
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 full analog input
range ensuring excellent linearity and low distortion when switch-
ing audio signals. Fast switching speed, coupled with high signal
bandwidth, also makes the parts suitable for video signal switch-
ing. 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.
CMOS 3 V/5 V, Wide Bandwidth Quad 2:1
These switches conduct equally well in both directions when
ON, and have an input signal range that extends to the sup-
plies. 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.
5. Low Leakage over Temperature.
6. Break-Before-Make Switching.
7. Crosstalk is typically –70 dB @ 30 MHz.
8. Off isolation is typically –60 dB @ 10 MHz.
9. Available in Chip Scale Package (CSP).
The ADG784 is fabricated on a CMOS process giving an
increased signal range that fully extends to the supply rails.
This prevents channel shorting when the switches are config-
ured as a multiplexer.
Mux in Chip Scale Package
FUNCTIONAL BLOCK DIAGRAM
S1A
S1B
S2A
S2B
S3A
S3B
S4A
S4B
EN
DECODER
ADG784
1-OF-2
IN
ADG784
D1
D2
D3
D4

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ADG784 Summary of contents

Page 1

... 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. CMOS 3 V/5 V, Wide Bandwidth Quad 2:1 ...

Page 2

... ADG784–SPECIFICATIONS SINGLE SUPPLY ( 10%, GND = 0 V. All specifications T DD Parameter ANALOG SWITCH Analog Signal Range On Resistance ( Resistance Match Between Channels (∆ Resistance Flatness (R ) FLAT(ON) LEAKAGE CURRENTS Source OFF Leakage I (OFF) S Drain OFF Leakage I (OFF) D Channel ON Leakage (ON) ...

Page 3

... MHz; Test Circuit Ω MHz; Test Circuit Ω; Test Circuit Ω nF; Test Circuit kHz kHz MHz Digital Inputs = Function DISABLE ADG784 ...

Page 4

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADG784 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...

Page 5

... DRAIN OR SOURCE VOLTAGE – 4 4.0 +85 C 3.5 3.0 +25 C 2.5 –40 C 2.0 1.5 1.0 0.5 0 0.6 1.1 1.6 2 DRAIN OR SOURCE VOLTAGE – Typical Performance Characteristics–ADG784 –2 –4 –6 4.9 10k – 100 L –20 –30 –40 –50 –60 –70 –80 –90 –100 4 ...

Page 6

... –5 –10 0 0.5 1.0 1.5 2.0 2.5 3.0 SOURCE VOLTAGE – BASE TX+ 10 BASE TX– 100 BASE TX+ 100 BASE TX– 10 BASE TX+ 10 BASE TX– 100 BASE TX+ 100 BASE TX– 10 BASE TX 100 BASE TX TX1 RX1 3.5 4.0 4.5 5.0 TX1 ADG784 TX2 RX1 TRANSFORMER RX2 120 100 RJ45 ...

Page 7

... OUT V 100 35pF S DECODER GND NETWORK ANALYZER OUT IN 50 ADG784 50% 50% 90% 90% t OFF t ON 50% 50% 50% 50 0.1 F ADG784 NETWORK ANALYZER S1A GND I (ON OUT ...

Page 8

... S3B S4A S4B PIN 1 INDICATOR 0.035 (0.90) MAX 0.033 (0.85) NOM SEATING PLANE V DD 0.1 F ADG784 S2A S1A GND ADG784 D1 V OUT C L 1nF D2 V OUT C L 1nF D3 V OUT C L 1nF D4 V OUT C L 1nF 1-OF-2 DECODER EN IN OUTLINE DIMENSIONS Dimensions shown in inches and (mm) ...

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