OPA689 Burr-Brown, OPA689 Datasheet

OPA689

Manufacturer Part Number

OPA689

Description

Wideband / High Gain VOLTAGE LIMITING AMPLIFIER

Manufacturer

Burr-Brown

Datasheet

1.OPA689.pdf (16 pages)

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FEATURES

DESCRIPTION

The OPA689 is a wideband, voltage feedback op amp

that offers bipolar output voltage limiting, and is stable

for gains

control of the output when it attempts to drive beyond

these limits. This new output limiting architecture holds

the limiter offset error to 15mV. The op amp operates

linearly to within 30mV of the limits.

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 signals will

be transparent to the signal channel. Implementing the

1997 Burr-Brown Corporation

information, visit www.burr-brown.com

HIGH LINEARITY NEAR LIMITING

FAST RECOVERY FROM OVERDRIVE: 2.4ns

LIMITING VOLTAGE ACCURACY: 15mV

–3dB BANDWIDTH (G = +6): 280MHz

STABLE FOR G

SLEW RATE: 1600V/ s

LOW GAIN VERSION: OPA688

–0.5

–1.0

–1.5

–2.0

–2.5

2.5

2.0

1.5

1.0

0.5

5V AND +5V SUPPLY OPERATION

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

+4. Two buffered limiting voltages take

LIMITED OUTPUT RESPONSE

VOLTAGE LIMITING AMPLIFIER

Time (200ns/div)

Wideband, High Gain

G = +6

= –2.0V

= 2.0V

PDS-1409D

APPLICATIONS

limiting function at the output, as opposed to the input,

gives the specified limiting accuracy for any gain, and

allows the OPA689 to be used in all standard op amp

applications.

Non-linear analog signal processing circuits will benefit

from the OPA689’s sharp transition from linear operation

to output limiting. The quick recovery time supports high

speed applications.

The OPA689 is available in an industry-standard pinout

in PDIP-8 and SO-8 packages. For lower gain applica-

tions requiring output limiting with fast recovery, con-

sider the OPA688.

2.10

2.05

2.00

1.95

1.90

1.85

1.80

1.75

1.70

1.65

1.60

TRANSIMPEDANCE WITH FAST

OVERDRIVE RECOVERY

FAST LIMITING ADC INPUT DRIVER

LOW PROP DELAY COMPARATOR

NON-LINEAR ANALOG SIGNAL

PROCESSING

DIFFERENCE AMPLIFIER

IF LIMITING AMPLIFIER

AM SIGNAL GENERATION

DETAIL OF LIMITED OUTPUT VOLTAGE

Time (50ns/div)

Printed in U.S.A. January, 2000

OPA689

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