OPA3681 Datasheet, PDF (1/22 Pages) Burr-Brown (TI) – Triple Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable

OPA3681
OPA3681
OPA3681
www.ti.com
TM _{Triple Wideband, Current-Feedback}
OPERATIONAL AMPLIFIER With Disable
FEATURES
q WIDEBAND +5V OPERATION: 225MHz (G = +2)
q UNITY GAIN STABLE: 280MHz (G = 1)
q HIGH OUTPUT CURRENT: 150mA
q OUTPUT VOLTAGE SWING: ±4.0V
q HIGH SLEW RATE: 2100V/µs
q LOW SUPPLY CURRENT: 6mA/ch
q LOW DISABLED CURRENT: 300µA/ch
q IMPROVED HIGH FREQUENCY PINOUT
APPLICATIONS
q RGB AMPLIFIERS
q WIDEBAND INA
q BROADBAND VIDEO BUFFERS
q HIGH SPEED IMAGING CHANNELS
q PORTABLE INSTRUMENTS
q ADC BUFFERS
q ACTIVE FILTERS
q CABLE DRIVERS
+5
V₁
1/3
OPA3681
–5
301Ω
66.5Ω
301Ω
250Ω
250Ω
+5
1/3
OPA3681
10 (V₁ – V₂)
–5
499Ω
+5
499Ω
1/3
OPA3681
V₂
–5 ^{High Speed INA (>120MHz)}
DESCRIPTION
The OPA3681 sets a new level of performance for broadband
triple current-feedback op amps. Operating on a very low
6mA/ch supply current, the OPA3681 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 distor-
tion. This gives exceptional single-supply operation. Using a
single +5V supply, the OPA3681 can deliver a 1V to 4V output
swing with over 100mA drive current and 150MHz bandwidth.
This combination of features makes the OPA3681 an ideal RGB
line driver or single-supply ADC input driver.
The OPA3681’s low 6mA/ch supply current is precisely trimmed
at 25°C. This trim, along with low drift over temperature,
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 OPA3681 supply current drops to less than 300µA/ch while
the output goes into a high impedance state. This feature may be
used for power savings or for video MUX applications.
OPA3681 RELATED PRODUCTS
Voltage Feedback
Current Feedback
Fixed Gain
SINGLES
OPA680
OPA681
OPA682
DUALS
OPA2680
OPA2681
OPA2682
TRIPLES
OPA3680
OPA3681
OPA3682
26
23
20
17
14
11
8
5
0.1M
DIFFERENTIAL TO SINGLE-ENDED
FREQUENCY RESPONSE
f_–3dB
1M
10M
100M
1G
Frequency (Hz)
Copyright © 1999, Texas Instruments Incorporated
SBOS095A
Printed in U.S.A. January, 2001