OP

A659

1

FEATURES

DESCRIPTION

APPLICATIONS

TRANSIMPEDANCEGAIN

vsFREQUENCY(C =22pF)

D

130

120

110

100

90

80

70

60

50

40

100k

1M

10M

100M

Frequency(Hz)

R =1M ,C =Open

F

F

W

R =1k ,C =4.7pF

F

F

W

R =10k ,

C =Open

F

F

W

R =10k ,C =1.5pF

F

F

W

R =100k ,C =Open

F

F

W

R =100k ,

C =0.5pF

F

F

W

R =1k ,C =Open

F

F

W

OPA659

+6V

R

OUT

0.1 F

m

10 F

m

0.1 F

m

10 F

m

-

6V

50

Load

W

I

D

C

D

C

F

V

OUT

R

F

Photo

Diode

-

V

B

l

OPA659

Wideband, Unity-Gain Stable, JFET-Input

OPERATIONAL AMPLIFIER

2

• HIGH BANDWIDTH: 650MHz (G = +1V/V)

The OPA659 combines a very wideband, unity-gain

stable, voltage-feedback operational amplifier with a

• HIGH SLEW RATE: 2550V/µs (4V Step)

JFET-input stage to offer an ultra-high dynamic range

• EXCELLENT THD: –78dBc at 10MHz

amplifier

for

high

impedance

buffering

in

data

• LOW INPUT VOLTAGE NOISE: 8.9nV/√Hz

acquisition

applications

such

as

oscilloscope

• FAST OVERDRIVE RECOVERY: 8ns

front-end amplifiers and machine vision applications

such as photodiode transimpedance amplifiers used

• FAST SETTLING TIME (1% 4V Step): 8ns

in wafer inspection.

• LOW INPUT OFFSET VOLTAGE: ±1mV

The

wide

650MHz

unity-gain

bandwidth

is

• LOW INPUT BIAS CURRENT: ±10pA

complemented by a very high 2550V/

µs slew rate.

• HIGH OUTPUT CURRENT: 70mA

The high input impedance and low bias current

provided by the JFET input are supported by the low

8.9nV/

√Hz input voltage noise to achieve a very low

• HIGH-IMPEDANCE DATA ACQUISITION INPUT

integrated

noise

in

wideband

photodiode

AMPLIFIER

transimpedance applications.

• HIGH-IMPEDANCE OSCILLOSCOPE INPUT

Broad transimpedance bandwidths are possible with

AMPLIFIER

the high 350MHz gain bandwidth product of this

• WIDEBAND PHOTODIODE TRANSIMPEDANCE

device.

AMPLIFIER

Where lower speed with lower quiescent current is

• WAFER SCANNING EQUIPMENT

required, consider the OPA656. Where unity-gain

stability is not required, consider the OPA657.

RELATED

OPERATIONAL AMPLIFIER

PRODUCTS

VOLTAGE

SLEW

BW

RATE

NOISE

AMPLIFIER

DEVICE

(V)

(MHz)

(V/

µs)

(nV/

√Hz)

DESCRIPTION

Unity-Gain

OPA356

+5

200

300

5.80

Stable CMOS

Fixed Gain of

OPA653

±6

500

2675

6.1

+2V/V

JFET-Input

Unity-Gain

OPA656

±5

500

290

7

Stable

JFET-Input

Gain of +7

OPA657

±5

1600

700

4.8

Stable

JFET-Input

Unity-Gain

OPA627

±15

16

55

4.5

Stable

DI-FET-Input

Unity-Gain

THS4631

±15

105

900

7

Stable

JFET-Input

1

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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.