Datenblatt-pdf.com


AD8134 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD8134
Beschreibung Triple Differential Driver
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 21 Seiten
AD8134 Datasheet, Funktion
Data Sheet
FEATURES
Triple high speed differential driver
225 MHz, −3 dB large signal bandwidth
450 MHz, −3 dB small signal bandwidth
Easily drives 1.4 V p-p video signal into doubly terminated
100 Ω UTP cable
1600 V/µs slew rate
Fixed internal gain of 2
Internal common-mode feedback network
Output balance error −60 dB @ 50 MHz
On-chip sync-on-common-mode circuitry
Output pull-down feature for line isolation
Differential input and output
Differential-to-differential or single-ended-to-differential
operation
High isolation between amplifiers: 80 dB @ 10 MHz
Low distortion: 64 dB SFDR @ 10 MHz on 5 V supply,
RL, dm = 200 Ω
Low offset: 3 mV typical output-referred on 5 V supply
Low power: 26.5 mA @ 5 V for three drivers and sync circuitry
Wide supply voltage range: +5 V to ±5 V
Available in space-saving packaging: 4 mm × 4 mm LFCSP
APPLICATIONS
Keyboard-video-mouse (KVM) networking
GENERAL DESCRIPTION
The AD8134 is a major advancement beyond using discrete
op amps for driving differential RGB signals over twisted pair
cable. The AD8134 is a triple, low cost differential or single-
ended input to differential output driver, and each amplifier has
a fixed gain of 2 to compensate for the attenuation of the line
termination resistors. The AD8134 is specifically designed for
RGB signals but can be used for any type of analog signals or
high speed data transmission. The AD8134 is capable of driving
either Category 5 (Cat-5) unshielded twisted pair (UTP) cable
or differential printed circuit board transmission lines with
minimal signal degradation.
A unique feature that allows the user to transmit balanced
horizontal and vertical video sync signals over the three
common-mode channels with minimal electromagnetic
interference (EMI) radiation is included on-chip.
The outputs of the AD8134 can be set to a low voltage state that
allows easy differential multiplexing of multiple drivers on the
same twisted pair cable, when used with external series diodes.
Triple Differential Driver
With Sync-On-Common-Mode
AD8134
FUNCTIONAL BLOCK DIAGRAM
24 23 22 21 20 19
AD8134
OPD 1
VS– 2
–IN R 3
×2
+IN R 4
G
VS– 5
R
B
–OUT R 6
18 SYNC LEVEL
17 VS+ (SYNC)
16 –IN B
15 +IN B
14 VS–
13 –OUT B
7 8 9 10 11 12
Figure 1.
0
VOUT, dm = 2V p-p
–10 VOUT, cm/VOUT, dm
–20
–30
VS = ±5V
–40
–50
VS = +5V
–60
–70
–80
–90
–100
1
10 100
FREQUENCY (MHz)
Figure 2. Output Balance vs. Frequency
500
The AD8134 driver is a natural complement to the AD8143,
AD8129, and AD8130 differential receivers.
Manufactured on the Analog Devices next generation XFCB
bipolar process, the AD8134 has a large signal bandwidth of
225 MHz and a slew rate of 1600 V/µs. The AD8134 has an
internal common-mode feedback feature that provides output
gain and phase matching that is balanced to −60 dB at 50 MHz,
suppressing harmonics and reducing radiated EMI.
The AD8134 is available in a 24-lead LFCSP and can operate
over the −40°C to +85°C extended industrial temperature range.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2004–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com






AD8134 Datasheet, Funktion
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
HSYNC, VSYNC, Sync Level
Power Dissipation
Input Common-Mode Voltage
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering 10 sec)
Junction Temperature
Rating
12 V
±VS
See Figure 3
±VS
−65°C to +125°C
−40°C to +85°C
300°C
150°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, θJA is
specified for the device soldered in a circuit board in still air.
Table 4. Thermal Resistance with the Underside Pad
Thermally Connected to a Copper Plane
Package Type/PCB Type
θJA
Unit
24-Lead LFCSP/4-Layer
70
°C/W
Maximum Power Dissipation
The maximum safe power dissipation in the AD8134 package is
limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, which is the glass transition
temperature, the plastic changes its properties. Even temporarily
exceeding this temperature limit can change the stresses that the
package exerts on the die, permanently shifting the parametric
performance of the AD8134. Exceeding a junction temperature
of 175°C for an extended period can result in changes in the
silicon devices potentially causing failure.
AD8134
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). The load current consists of differential
and common-mode currents flowing to the loads, as well as
currents flowing through the internal differential and common-
mode feedback loops. The internal resistor tap used in the
common-mode feedback loop places a 4 kΩ differential load on
the output. RMS output voltages should be considered when
dealing with ac signals.
Airflow reduces θJA. In addition, more metal directly in contact
with the package leads from metal traces, through holes,
ground, and power planes reduce the θJA. The exposed pad on
the underside of the package must be soldered to a pad on the
PCB surface that is thermally connected to a PCB plane to
achieve the specified θJA.
Figure 3 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the 24-lead LFCSP
(70°C/W) on a JEDEC standard 4-layer board with the
underside paddle soldered to a pad that is thermally connected
to a PCB plane. θJA values are approximations.
4.0
3.5
3.0
2.5
2.0
LFCSP
1.5
1.0
0.5
0
–40 –20 0 20 40 60
AMBIENT TEMPERATURE (°C)
80
Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
ESD CAUTION
Rev. B | Page 5 of 20

6 Page









AD8134 pdf, datenblatt
Data Sheet
–30
VOUT, dm/VIN, dm WITH
–32 OUTPUT PULL-DOWN
–34
–36
–38 VIN = 2V p-p
–40
–42
–44
–46
–48
–50
0.1
1 10 100
FREQUENCY (MHz)
Figure 24. Output Pull-Down Isolation vs. Frequency
4.0
1000
3.5
VS = ±5V
3.0
2.5 5.0
2.0
VS = +5V
1.5
4.5
4.0
1.0
–40 –25
–5 15 35
TEMPERATURE (°C)
55
3.5
75 85
Figure 25. Positive Output Saturation Voltage vs. Temperature
40
VS = ±5V
35
30
25 VS = +5V
20
15
10
5
0
–40 –30
–10 10 30 50
TEMPERATURE (°C)
70
Figure 26. Power Supply Current vs. Temperature
85
AD8134
4.5
3.5
2.5 5
1.5 4
0.5
–0.5
VS = +5V
VS = ±5V
3
2
–1.5 1
–2.5 0
–3.5
–4.5
100
1000
LOAD ()
10000
Figure 27. Output Saturation Voltage vs. Output Load
–1.0
–1.5
VS = +5V
RL, dm = 200
1.5
1.0
–2.0
0.5
–2.5
0
–3.0
VS = ±5V
–3.5
–40 –25
–5 15 35
TEMPERATURE (°C)
55
75 85
Figure 28. Negative Output Saturation Voltage vs. Temperature
Rev. B | Page 11 of 20

12 Page





SeitenGesamt 21 Seiten
PDF Download[ AD8134 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
AD813Low Power Triple Video AmplifierAnalog Devices
Analog Devices
AD8130(AD8129 / AD8130) Low Cost 270 MHz Differential Receiver AmplifiersAnalog Devices
Analog Devices
AD8131Low-Cost / High-Speed Differential DriverAnalog Devices
Analog Devices
AD8132Low-Cost/ High-Speed Differential AmplifierAnalog Devices
Analog Devices
AD8133Triple Differential DriverAnalog Devices
Analog Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche