OPA681N BURR-BROWN [Burr-Brown Corporation], OPA681N Datasheet

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OPA681N

Manufacturer Part Number
OPA681N
Description
Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable
Manufacturer
BURR-BROWN [Burr-Brown Corporation]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
OPA681N
Manufacturer:
TI
Quantity:
5 321
Part Number:
OPA681N
Manufacturer:
BB
Quantity:
20 000
FEATURES
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,
©
1997 Burr-Brown Corporation
WIDEBAND +5V OPERATION: 225MHz (G = +2)
UNITY GAIN STABLE: 280MHz (G = 1)
HIGH OUTPUT CURRENT: 150mA
OUTPUT VOLTAGE SWING: 4.0V
HIGH SLEW RATE: 2100V/ s
LOW dG/d : .001%/.01
LOW SUPPLY CURRENT: 6mA
LOW DISABLED CURRENT: 320 A
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
OPERATIONAL AMPLIFIER With Disable
V
V
V
V
V
1
2
3
4
5
®
50
50
50
50
50
200MHz RF Summing Amplifier
23.7
TM
Wideband, Current Feedback
+5V
–5V
OPA681
100
DIS
PDS-1427C
APPLICATIONS
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 320 A 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
50
Voltage Feedback
Current Feedback
Fixed Gain
xDSL LINE DRIVER
BROADBAND VIDEO BUFFERS
HIGH SPEED IMAGING CHANNELS
PORTABLE INSTRUMENTS
ADC BUFFERS
ACTIVE FILTERS
WIDEBAND INVERTING SUMMING
HIGH SFDR IF AMPLIFIER
RG-58
V
100MHz, –1dB Compression
O
50
= – (V
SINGLES
OPA680
OPA681
OPA682
1
+ V
= 15dBm
2
+ V
3
+ V
OPA2680
OPA2681
OPA2682
DUALS
4
+ V
Printed in U.S.A. March, 1999
5
OPA681
)
TRIPLES
OPA3680
OPA3681
OPA3682

Related parts for OPA681N

OPA681N Summary of contents

Page 1

OPERATIONAL AMPLIFIER With Disable FEATURES WIDEBAND +5V OPERATION: 225MHz (G = +2) UNITY GAIN STABLE: 280MHz ( HIGH OUTPUT CURRENT: 150mA OUTPUT VOLTAGE SWING: 4.0V HIGH SLEW RATE: 2100V/ s LOW dG/d : .001%/.01 LOW SUPPLY CURRENT: ...

Page 2

SPECIFICATIONS 402 , R = 100 , and (Figure 1 for AC performance only), unless otherwise noted PARAMETER AC PERFORMANCE (Figure 1) Small-Signal Bandwidth (V = 0.5Vp-p) O Bandwidth for 0.1dB Gain ...

Page 3

SPECIFICATIONS 499 , R = 100 to V /2, and (Figure 2 for AC performance only), unless otherwise noted PARAMETER AC PERFORMANCE (Figure 2) Small-Signal Bandwidth (V = 0.5Vp-p) O Bandwidth ...

Page 4

... NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are available only as Tape and Reel in the quantity indicated after the slash (e.g. /2K5 indicates 2500 devices per reel). Ordering 3000 pieces of the OPA681N/3K will get a single 3000-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of the Burr-Brown IC Data Book. The information provided herein is believed to be reliable ...

Page 5

TYPICAL PERFORMANCE CURVES + 402 , and R = 100 , unless otherwise noted (see Figure 1 SMALL-SIGNAL FREQUENCY RESPONSE + 453 –1 –2 –3 ...

Page 6

TYPICAL PERFORMANCE CURVES + 402 , and R = 100 , unless otherwise noted (see Figure 1 5MHz 2ND HARMONIC DISTORTION vs OUTPUT VOLTAGE –60 – 100 L – ...

Page 7

TYPICAL PERFORMANCE CURVES + 402 , and R = 100 , unless otherwise noted (see Figure 1 2ND HARMONIC DISTORTION vs FREQUENCY – 2Vp +10 ...

Page 8

TYPICAL PERFORMANCE CURVES + 402 , and R = 100 , unless otherwise noted (see Figure 1 CMRR AND PSRR vs FREQUENCY 70 +PSRR 65 –PSRR 60 55 CMRR ...

Page 9

TYPICAL PERFORMANCE CURVES + 499 , and R = 100 to +2.5V, unless otherwise noted (see Figure 2 SMALL-SIGNAL FREQUENCY RESPONSE + –1 –2 –3 G ...

Page 10

TYPICAL PERFORMANCE CURVES + 499 , and R = 100 to +2.5V, unless otherwise noted (see Figure 2 2ND HARMONIC DISTORTION vs FREQUENCY – 2Vp 100 to 2.5V ...

Page 11

APPLICATIONS INFORMATION WIDEBAND CURRENT FEEDBACK OPERATION The OPA681 gives the exceptional AC performance of a wideband current feedback op amp with a highly linear, high power output stage. Requiring only 6mA quiescent current, the OPA681 will swing to within 1V ...

Page 12

SINGLE-SUPPLY A/D CONVERTER INTERFACE Most modern, high performance A/D converters (such as the Burr-Brown ADS8xx and ADS9xx series) operate on a single +5V (or lower) power supply. It has been a consider- able challenge for single-supply op amps to deliver ...

Page 13

V DIS Video 1 Video 2 FIGURE 4. Two-Channel Video Multiplexer. The section on Disable Operation shows the turn-on and turn-off switching glitches using a grounded input for a single channel is typically less than 50mV. Where two outputs ...

Page 14

... PACKAGE NUMBER OPA681P 8-Pin DIP DEM-OPA68xP OPA681U 8-Pin SO-8 DEM-OPA68xU OPA681N 6-Lead SOT23-6 DEM-OPA68xN Contact the Burr-Brown applications support line to request any of these boards. MACROMODELS AND APPLICATIONS SUPPORT Computer simulation of circuit performance using SPICE is often useful when analyzing the performance of analog circuits and systems. This is particularly true for video and RF amplifier circuits where parasitic capacitance and induc- tance can have a major effect on circuit performance ...

Page 15

A current feedback op amp senses an error current in the inverting node (as opposed to a differential input error voltage for a voltage feedback op amp) and passes this on to the output through an internal frequency dependent transimpedance ...

Page 16

OPA680, since the feedback resistor is the compensation element for a current feedback op amp. Wideband inverting operation (and especially summing) is particularly suited to the OPA681. Figure 8 shows a typical inverting ...

Page 17

A 5 resistor in each power supply lead will limit the internal power dissipation to less than 1W for an output short circuit while decreasing the available output voltage swing only 0.5V for up ...

Page 18

In this model, all noise terms are taken to be noise voltage or current density terms in either nV pA/ Hz. The total output spot noise voltage can be computed as the square root of the sum ...

Page 19

... Note that it is the power in the output stage and not in the load that determines internal power dissipation worst-case example, compute the maximum T OPA681N (SOT23-6 package) in the circuit of Figure 1 operating at the maximum specified ambient temperature of +85 C and driving a grounded 20 = 10V x 7.2mA + 5 ...

Page 20

This puts a high current through a large internal voltage drop in ...

Page 21

INPUT AND ESD PROTECTION The OPA681 is built using a very high speed complemen- tary bipolar process. The internal junction breakdown volt- ages are relatively low for these very small geometry de- vices. These breakdowns are reflected in the Absolute ...

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