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Analog Devices - Triple Differential Drivers

Numéro de référence AD8141
Description Triple Differential Drivers
Fabricant Analog Devices 
Logo Analog Devices 





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AD8141 fiche technique
Data Sheet
Low Cost, Triple Differential Drivers
for Wideband Video
AD8141/AD8142
FEATURES
Triple, high speed differential drivers
255 MHz, −3 dB large signal bandwidth
65 MHz, 0.1 dB flatness
1150 V/µs slew rate
12 ns settling time
Single 5 V or split supply operation
Fixed gain of 2
Internal common-mode feedback network
Output balance error −50 dB at 50 MHz
AD8142 has integrated sync-on-common-mode circuitry
High-Z output when disabled
Differential-to-differential or single-ended-to-differential
operation
High isolation between amplifiers: −100 dB at 10 MHz
Low power: 44 mA at 5 V
Available in space-saving packaging: 4 mm × 4 mm LFCSP
FUNCTIONAL BLOCK DIAGRAMS
DIS 1
VS–/GND 2
–IN A 3
+IN A 4
VS–/GND 5
–OUT A 6
24 23 22 21 20 19
+–
AD8141
–+
–+
18 VOCMC
17 VS+
16 –IN C
15 +IN C
14 VS–/GND
13 –OUT C
7 8 9 10 11 12
Figure 1.
APPLICATIONS
Keyboard-video-mouse (KVM) networking
Video distribution
Digital signage
Security cameras
GENERAL DESCRIPTION
The AD8141 and AD8142 are triple, low cost, differential or
single-ended-input-to-differential-output drivers. Each amplifier
has a fixed gain of 2 to compensate for the attenuation of the
line termination resistors. The AD8141 and AD8142 are
specifically designed for RGB signals but can be used for any
type of signals. The amplifiers have very fast slew rate and
settling time while being manufactured on a cost effective
CMOS process. They are optimized for high resolution video
performance with a 0.1 dB flatness of 65 MHz, which allows
driving high resolution video over any type of UTP cable.
The drivers have an internal common-mode feedback loop
that provides output amplitude and phase matching, achieving
−50 dB balance error at 50 MHz and thereby suppressing even-
order harmonics and minimizing radiated electromagnetic
interference (EMI).
24 23 22 21 20 19
AD8142
DIS 1
VS–/GND 2
–IN R 3
+IN R 4
VS–/GND 5
–OUT R 6
×2
+– –+ –+
18 SYNC LEVEL
17 VS+
16 –IN B
15 +IN B
14 VS–/GND
13 –OUT B
7 8 9 10 11 12
Figure 2.
The AD8142 includes a unique sync-on-common-mode feature
that allows the user to transmit balanced horizontal and vertical
video sync signals over the three common-mode channels.
Additionally, the AD8141 and AD8142 both have a disable
feature that, when asserted, produces high-Z outputs, allowing
line isolation and easy multiplexing.
The AD8141 and AD8142 are available in a 24-lead 4 mm × 4 mm
LFCSP and operate over a temperature range of −40°C to +85°C.
They can be used with the AD8145 triple differential-to-single-
ended receiver, AD8123 triple equalizer, AD8120 triple delay
line, and the AD8117 or AD8175 crosspoint switches to produce
a high resolution video distribution system.
Rev. A
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 ©2011–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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