OPA681 Datasheet PDF - Burr-Brown
| Part Number | OPA681 | |
| Description | Wideband / Current Feedback OPERATIONAL AMPLIFIER With Disable | |
| Manufacturers | Burr-Brown | |
| Logo |  |
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®
OPA681
OPA681
OPA681
OPA681
TM 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 dG/dφ: .001%/.01°
q LOW SUPPLY CURRENT: 6mA
q LOW DISABLED CURRENT: 320µA
APPLICATIONS
q xDSL LINE DRIVER
q BROADBAND VIDEO BUFFERS
q HIGH SPEED IMAGING CHANNELS
q PORTABLE INSTRUMENTS
q ADC BUFFERS
q ACTIVE FILTERS
q WIDEBAND INVERTING SUMMING
q 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,
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
Voltage Feedback
Current Feedback
Fixed Gain
SINGLES
OPA680
OPA681
OPA682
DUALS
OPA2680
OPA2681
OPA2682
TRIPLES
OPA3680
OPA3681
OPA3682
+5V
DIS
50Ω
V1
50Ω
V2
50Ω
V3
50Ω
V4
50Ω
V5
OPA681
23.7Ω
100Ω
50Ω
RG-58
VO = – (V1 + V2 + V3 + V4 + V5)
50Ω
100MHz, –1dB Compression
= 15dBm
–5V
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
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TYPICAL PERFORMANCE CURVES: VS = ±5V
G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted (see Figure 1).
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
0
SMALL-SIGNAL FREQUENCY RESPONSE
G = +1, RF = 453Ω
G = +2, RF = 402Ω
G = +5, RF = 261Ω
G = +10, RF = 180Ω
125MHz
Frequency (25MHz/div)
250MHz
LARGE-SIGNAL FREQUENCY RESPONSE
8
7 G = +2, RL = 100Ω
6
5 2Vp-p
4
3
2 1Vp-p
4Vp-p
1
0 7Vp-p
–1
–2
0
125MHz
Frequency (25MHz/div)
250MHz
400
300
200
100
0
–100
–200
–300
–400
SMALL-SIGNAL PULSE RESPONSE
G = +2
VO = 0.5Vp-p
Time (5ns/div)
LARGE-SIGNAL PULSE RESPONSE
+4
+3 G = +2
VO = 5Vp-p
+2
+1
0
–1
–2
–3
–4
Time (5ns/div)
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
VDIS
2.0
1.6
1.2
0.8
0.4
G = +2
VIN = +1V
0
Output Voltage
Time (50ns/div)
6.0
4.0
2.0
0
DISABLED FEEDTHROUGH vs FREQUENCY
–45
–50 VDIS = 0
–55
–60
–65
–70
Forward
Reverse
–75
–80
–85
–90
–95
1
10
Frequency (MHz)
100
®
5 OPA681
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for OPA681 electronic component. |
| Information | Total 21 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ OPA681.PDF Datasheet ] | |
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