®
OPA
681
OPA681
OPA
681
OPA
681
Wideband, Current Feedback
OPERATIONAL AMPLIFIER With Disable
TM
FEATURES
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WIDEBAND +5V OPERATION: 225MHz (G = +2)
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UNITY GAIN STABLE: 280MHz (G = 1)
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HIGH OUTPUT CURRENT: 150mA
OUTPUT VOLTAGE SWING:
±
4.0V
HIGH SLEW RATE: 2100V/
µ
s
LOW dG/d
φ
: .001%/.01
°
LOW SUPPLY CURRENT: 6mA
LOW DISABLED CURRENT: 320
µ
A
APPLICATIONS
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xDSL LINE DRIVER
BROADBAND VIDEO BUFFERS
HIGH SPEED IMAGING CHANNELS
PORTABLE INSTRUMENTS
ADC BUFFERS
ACTIVE FILTERS
WIDEBAND INVERTING SUMMING
HIGH SFDR IF AMPLIFIER
DESCRIPTION
The OPA681 sets a new level of performance for broadband
current feedback op amps. Operating on a very low 6mA
supply current, the OPA681 offers a slew rate and output
power normally associated with a much higher supply cur-
rent. 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 OPA681 can deliver a 1V to
4V output swing with over 100mA drive current and 150MHz
bandwidth. This combination of features makes the OPA681
an ideal RGB line driver or single-supply ADC input driver.
The OPA681’s low 6mA supply current is precisely trimmed
at 25°C. This trim, along with low drift over temperature,
+5V
DIS
50Ω
V
1
50Ω
V
2
50Ω
V
3
50Ω
V
4
50Ω
V
5
–5V
23.7Ω
100Ω
100MHz, –1dB Compression
= 15dBm
50Ω
V
O
= – (V
1
+ V
2
+ V
3
+ V
4
+ V
5
)
RG-58
50Ω
guarantees lower guaranteed maximum supply current than
competing products. System power may be further reduced by
using the optional disable control pin. Leaving this disable pin
open, or holding it high, gives normal operation. If pulled low,
the OPA681 supply current drops to less than 320µA while the
output goes into a high impedance state. This feature may be
used for either power savings or for video MUX applications.
OPA681 RELATED PRODUCTS
SINGLES
Voltage Feedback
Current Feedback
Fixed Gain
OPA680
OPA681
OPA682
DUALS
OPA2680
OPA2681
OPA2682
TRIPLES
OPA3680
OPA3681
OPA3682
OPA681
200MHz RF Summing Amplifier
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1997 Burr-Brown Corporation
PDS-1427C
Printed in U.S.A. March, 1999
BURR-BROWN [ BURR-BROWN CORPORATION ]
