OPA687 Burr-Brown, OPA687 Datasheet

OPA687

Manufacturer Part Number

OPA687

Description

Wideband / Ultra-Low Noise / Voltage Feedback OPERATIONAL AMPLIFIER With Power Down

Manufacturer

Burr-Brown

Datasheet

1.OPA687.pdf (16 pages)

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DESCRIPTION

The OPA687 combines a very high gain bandwidth and

large signal performance with an ultra-low input noise

voltage (0.95nV/ Hz) while dissipating only 18mA sup-

ply current. Where power savings is paramount, the

OPA687 also includes an optional power down pin that,

when pulled low, will disable the amplifier and decrease

the quiescent current to only 1% of its powered up value.

This optional feature may be left disconnected to insure

normal amplifier operation when no power-down is re-

quired.

The combination of low input voltage and current noise,

along with a 3.8GHz gain bandwidth product, make the

OPA687 an ideal amplifier for wideband transimpedance

For most current data sheet and other product

Figure

FEATURES

< 6dB

Noise

1998 Burr-Brown Corporation

information, visit www.burr-brown.com

HIGH GAIN BANDWIDTH: 3.8GHz

LOW INPUT VOLTAGE NOISE: 0.95nV/ Hz

VERY LOW DISTORTION: –95dBc (5MHz)

LOW DISABLED POWER: 2mW

VERY HIGH SLEW RATE: 900V/ s

STABLE FOR G

Voltage Feedback OPERATIONAL AMPLIFIER

IInternational 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 In

1:2

Differential Input ADC Driver

Ultra-High Dynamic Range

100

39pF

OPA687

+5V

–5V

850

1.7pF

With Power Down

Wideband, Ultra-Low Noise,

80pF

PDS-1372C

65MSPS

ADS852

14-Bit

+5V

–

APPLICATIONS

OPA687 RELATED PRODUCTS

stages. As a voltage gain stage, the OPA687 is opti-

mized for a flat frequency response at a gain of +20 and

is guaranteed stable down to gains of +12. New external

compensation techniques allows the OPA687 to be used

at any inverting gain with excellent frequency response

control. Using this compensation can give an extremely

high dynamic range ADC driver to support > 40MSPS

12- and 14-bit converters.

SINGLES

OPA642

OPA643

OPA686

LOW DISTORTION ADC DRIVER

OC-3 FIBER OPTIC RECEIVER

LOW NOISE DIFFERENTIAL AMPLIFIERS

EQUALIZING RECEIVERS

ULTRASOUND CHANNEL AMPLIFIERS

IMPROVED REPLACEMENT FOR THE

CLC425

Measured 2-Tone, 3rd-Order Distortion for

–60

–65

–70

–75

–80

–85

OPA2686

DUAL

Differential ADC Driver.

VOLTAGE (nV/ Hz)

INPUT NOISE

Center Frequency (MHz)

2.7

2.3

1.3

OPA687

Printed in U.S.A. May, 2000

OPA687

4Vp-p

GAIN BANDWIDTH

PRODUCT (MHz)

2Vp-p

1600

210

800

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