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OPA688U Datasheet

  • OPA688U

  • Unity Gain Stable, Wideband VOLTAGE LIMITING AMPLIFIER

  • 16頁

  • BB

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廬
OPA
6
88
OPA688
OPA
6
88
For most current data sheet and other product
information, visit www.burr-brown.com
Unity Gain Stable, Wideband
VOLTAGE LIMITING AMPLIFIER
TM
FEATURES
q
q
q
q
q
q
q
HIGH LINEARITY NEAR LIMITING
FAST RECOVERY FROM OVERDRIVE: 2.4ns
LIMITING VOLTAGE ACCURACY:
鹵
15mV
鈥?dB BANDWIDTH (G = +1): 530MHz
SLEW RATE: 1000V/
碌
s
鹵
5V AND 5V SUPPLY OPERATION
HIGH GAIN VERSION: OPA689
APPLICATIONS
q
q
q
q
q
q
q
q
FAST LIMITING ADC INPUT BUFFER
CCD PIXEL CLOCK STRIPPING
VIDEO SYNC STRIPPING
HF MIXER
IF LIMITING AMPLIFIER
AM SIGNAL GENERATION
NON-LINEAR ANALOG SIGNAL PROCESSING
COMPARATOR
DESCRIPTION
The OPA688 is a wideband, unity gain stable voltage
feedback op amp that offers bipolar output voltage lim-
iting. Two buffered limiting voltages take control of the
output when it attempts to drive beyond these limits.
This new output limiting architecture holds the limiter
offset error to
鹵15mV.
The op amp operates linearly to
within 30mV of the output limit voltages.
The combination of narrow nonlinear range and low
limiting offset allows the limiting voltages to be set
within 100mV of the desired linear output range. A fast
2.4ns recovery from limiting ensures that overdrive sig-
nals will be transparent to the signal channel. Imple-
menting the limiting function at the output, as opposed to
the input, gives the specified limiting accuracy for any
gain, and allows the OPA688 to be used in all standard
op amp applications.
Non-linear analog signal processing will benefit from
the OPA688鈥檚 sharp transition from linear operation to
output limiting. The quick recovery time supports high
speed applications.
The OPA688 is available in an industry standard pinout
in PDIP-8 and SO-8 packages. For higher gain, or
transimpedance applications requiring output limiting
with fast recovery, consider the OPA689.
LIMITED OUTPUT RESPONSE
2.5
2.0
Input and Output Voltage (V)
2.10
DETAIL OF LIMITED OUTPUT VOLTAGE
2.05
2.00
V
H
= 鈥揤
L
= 2.0V
G = +2
Output Voltage (V)
1.5
1.0
0.5
0
鈥?.5
鈥?.0
鈥?.5
鈥?.0
鈥?.5
Time (200ns/div)
V
IN
V
O
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
Time (50ns/div)
V
O
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111
Twx: 910-952-1111 鈥?Internet: http://www.burr-brown.com/ 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
廬
漏
1997 Burr-Brown Corporation
PDS-1424D
1
OPA688
Printed in U.S.A. January, 2000

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