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

Product

Folder

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Buy

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OPA659

SBOS342C – DECEMBER 2008 – REVISED NOVEMBER 2015

OPA659 Wideband, Unity-Gain Stable, JFET-Input

Operational Amplifier

1 Features

3 Description

The OPA659 combines a very wideband, unity-gain

1

•

High Bandwidth: 650 MHz (G = 1 V/V)

stable, voltage-feedback operational amplifier with a

•

High Slew Rate: 2550 V/

μs (4-V Step)

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

•

Excellent THD: –78 dBc at 10 MHz

amplifier

for

high

impedance

buffering

in

data

acquisition applications such as oscilloscope front-

•

Low Input Voltage Noise: 8.9 nV/

√Hz

end amplifiers and machine vision applications such

•

Fast Overdrive Recovery: 8 ns

as photodiode transimpedance amplifiers used in

•

Fast Settling time (1% 4-V Step): 8 ns

wafer inspection.

•

Low Input Offset Voltage: ±1 mV

The

wide

650-MHz

unity-gain

bandwidth

is

•

Low Input Bias Current: ±10 pA

complemented by a very high 2550-V/

μs slew rate.

•

High Output Current: 70 mA

The high input impedance and low bias current

provided by the JFET input are supported by the low

2 Applications

8.9-nV/

√Hz input voltage noise to achieve a very low

integrated

noise

in

wideband

photodiode

•

High-Impedance Data Acquisition Input Amplifiers

transimpedance applications.

•

High-Impedance Oscilloscope Input Amplifiers

Broad transimpedance bandwidths are possible with

•

Wideband Photodiode Transimpedance Amplifiers

the high 350-MHz gain bandwidth product of this

•

Wafer Scanning Equipment

device.

•

Optical Time-Domain Reflectometry (OTDR)

Where lower speed with lower quiescent current is

•

High-Speed Time-of-Flight (TOF) Sensing

required, consider the OPA656. Where unity-gain

stability is not required, consider the OPA657.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOT-23 (5)

2.90 mm × 1.60 mm

OPA659

SON (8)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

Transimpedance Gain vs Frequency

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.