OPA656

(47 pF)

λ

499 k

Ω

499 k

Ω

V

O

1 pF

Frequency

130

120

110

100

90

80

10kHz

100kHz

1MHz

5MHz

1MHz Bandwidth

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OPA656

SBOS196H – DECEMBER 2001 – REVISED SEPTEMBER 2015

OPA656 Wideband, Unity-Gain Stable, FET-Input Operational Amplifier

1 Features

3 Description

The OPA656 device combines a very wideband,

1

•

500 MHz Unity-gain Bandwidth

unity-gain

stable,

voltage-feedback

operational

•

Low Input Bias Current: 2 pA

amplifier with a FET-input stage to offer an ultra high

•

Low Offset And Drift: ±250 µV, ±2

μV/°C

dynamic-range

amplifier

for

Analog-to-Digital

Converter

(ADC)

buffering

and

transimpedance

•

Low Distortion: 74-dB SFDR at 5 MHz

applications. Extremely low DC errors give good

•

High-Output Current: 70 mA

precision in optical applications.

•

Low Input Voltage Noise: 7 nV/

√Hz

The high unity-gain stable bandwidth and JFET input

allows exceptional performance in high-speed, low-

2 Applications

noise integrators.

•

Wideband Photodiode Amplifiers

The high input impedance and low bias current

•

Sample-and-Hold Buffers

provided by the FET input is supported by the ultra-

•

CCD Output Buffers

low 7-nV/

√Hz input voltage noise to achieve a very

low

integrated

noise

in

wideband

photodiode

•

ADC Input Buffers

transimpedance applications.

•

Wideband Precision Amplifiers

Broad transimpedance bandwidths are achievable

•

Test and Measurement Front Ends

given the OPA656 device’s high 230-MHz gain

bandwidth

product.

As

shown

below,

a

–3-dB

bandwidth of 1 MHz is provided even for a high 1-M

Ω

transimpedance

gain

from

a

47-pF

source

capacitance.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOIC (8)

2.90 mm × 1.60 mm

OPA656

SOT-23 (5)

4.90 mm × 3.91 mm

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

the end of the data sheet.

1-M

Ω Transimpedance Bandwidth

Wideband Photodiode Transimpedance Amplifier

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.