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OPA2681U Datasheet

  • OPA2681U

  • Current-Feedback Operational Amplifier

  • 22頁

  • ETC

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OPA
2
OPA
268
681
OPA2681
1
www.ti.com
Dual Wideband, Current Feedback
OPERATIONAL AMPLIFIER With Disable
TM
FEATURES
q
WIDEBAND +5V OPERATION: 225MHz (G = +2)
q
UNITY GAIN STABLE: 280MHz (G = 1)
q
q
q
q
q
q
HIGH OUTPUT CURRENT: 150mA
OUTPUT VOLTAGE SWING:
鹵
4.0V
HIGH SLEW RATE: 2100V/
碌
s
LOW SUPPLY CURRENT: 6mA/ch
LOW DISABLED CURRENT: 200
碌
A/ch
ENABLE/DISABLE TIME: 25ns/100ns
APPLICATIONS
q
q
q
q
q
q
q
q
xDSL LINE DRIVER
MATCHED I/Q CHANNEL AMPLIFIER
BROADBAND VIDEO BUFFERS
HIGH SPEED IMAGING CHANNELS
PORTABLE INSTRUMENTS
DIFFERENTIAL ADC DRIVERS
ACTIVE FILTERS
WIDEBAND INVERTING SUMMING
DESCRIPTION
The OPA2681 sets a new level of performance for broadband dual
current feedback op amps. Operating on a very low 6mA/ch
supply current, the OPA2681 offers a slew rate and output power
normally associated with a much higher supply current. A new
output stage architecture delivers a high output current with
minimal voltage headroom and crossover distortion. This gives
exceptional single supply operation. Using a single +5V supply,
the OPA2681 can deliver a 1V to 4V output swing with over
100mA drive current and 150MHz bandwidth. This combination
of features makes the OPA2681 an ideal RGB line driver or single
supply ADC input driver.
+12V
The OPA2681鈥檚 low 6mA/ch supply current is precisely trimmed
at 25擄C. This trim, along with low drift over temperature, guaran-
tees lower guaranteed maximum supply current than competing
products. System power may be further reduced by using the
optional disable control pin (SO-14 only). Leaving this disable
pin open, or holding it high, gives normal operation. If pulled low,
the OPA2681 supply current drops to less than 400碌A while the
output goes into a high impedance state. This feature may be used
for either power savings or for video MUX applications.
OPA2681 RELATED PRODUCTS
SINGLES
Voltage Feedback
Current Feedback
Fixed Gain
OPA680
OPA681
OPA682
DUALS
OPA2680
OPA2681
OPA2682
TRIPLES
OPA3680
OPA3681
OPA3682
1/2
OPA2681
324鈩?/div>
12.4鈩?/div>
1:2
+6.5V
2Vp-p
2k鈩?/div>
1碌F
100鈩?/div>
15Vp-p
100鈩?/div>
324鈩?/div>
12.4鈩?/div>
2k鈩?/div>
1/2
OPA2681
Single Supply ADSL Upstream Driver
Copyright 漏 1997, Texas Instruments Incorporated
SBOS091A
Printed in U.S.A. January, 2001

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